From lve1@inel.gov Wed Sep 18 16:17:34 1996 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.1/8.7.1) with ESMTP id QAA09900 for ; Wed, 18 Sep 1996 16:17:01 -0400 (EDT) X-Received-x: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.1/8.7.1) with ESMTP id QAA09900 for ; Wed, 18 Sep 1996 16:17:01 -0400 (EDT) Received: from pc-lve.inel.gov ([134.20.14.12]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA23715; Wed, 18 Sep 1996 14:17:05 -0600 Message-Id: <2.2.16.19960918201800.27c7b378@134.20.173.29> X-Sender: lve1@134.20.173.29 X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Wed, 18 Sep 1996 14:18:00 -0600 To: Anders Wandahl , William McFadden , "Taylor Greg" , , cookes@pop.jaring.my (Siong Teck Cheun @ Joseph), BERGESON@PPCC.CCCOES.EDU From: lve1@inel.gov (Larry V East) Subject: QRP+ V4C EPROM Status: RO 16 September 1996 I finally got around to installing the "Rev 4C" EPROM from Index in my QRP-PLUS. This is a "supplied upon request" $6 upgrade for the original QRP+ (not the new improved version) that is intended to cure a couple of keying problems. In particular, it eliminates the "forced spacing" of the internal keyer that so many folks objected to and it allows an external keyer to be used up to at least 40 wpm. Turns out that characteristics of the SCAF (switched capacitance audio filter) are also changed by this upgrade. The EPROM that I replaced was "Rev 03"; that's the one that changes the internal keyer to provide 1 wpm rather than 5 wpm speed increments and "remembers" the last operating mode (CW or SSB). The Rev 03 new features are still present in the Rev 4C code. I decided to keep the Rev 03 EPROM (I sent Index $10 rather than $6 and the old chip) for a "backup" and so that I could make some direct comparisons with the Rev 4C code. I present the results of my comparisons here for your information and edification. Keying Characteristics ---------------------- The Rev 4C code changes did indeed eliminate the "forced spacing" characteristic of the internal keyer. The "feel" of the internal keyer is now the same (or very close to) "Curtis B mode" keyers and is much easier (for me) to use. The rig will now follow an external keyer up to at least 44 wpm (that's as fast as my keyer will run), whereas the Rev 03 and earlier EPROMs would not allow external keying above 27 wpm or so. However, keying becomes erratic above 42 wpm when in RIT or SPLIT mode with either the internal keyer or external keying, so for all practical purposes the keying speed is limited to about 40 wpm. A disappointing side-effect of the Rev 4C code is that keying is very mushy when in normal XCEVE mode -- the rise time of the transmitter output envelope is almost 10ms! When the front panel mode switch is in the RIT or SPLIT position, the keyed output risetime is about 2ms -- the same as with the Rev 03 code -- resulting in much better sounding keying. "What's going on here," you may well ask (as did I). To answer that requires a little explanation of the keying sequence in the rig. When a key closure occurs, +12V is immediately applied to the transmitter driver stages and the antenna is switched from the receive to the transmit RF chain. However, the actual keying signal (a voltage applied to the balanced modulator to unbalance it and let RF pass) is delayed slightly -- about 5ms in XCEVE and about 25 ms if RIT or SPLIT is turned on. (This delay was much longer with previous firmware versions which resulted in the limited external keying speed.) The short delay when in XCEVE does not allow the bias on the first driver transistor to reach its final operating point before RF is applied resulting in the slow rise of the output RF envelope. So -- does that mean that one must leave the mode switch in RIT or SPLIT to get decent keying? Well, not if you are willing to make a simple modification to the RF board: decrease the size of C54 by a factor of 10 from 4.7uF to 0.47uF. That simple change will result in a 2ms risetime when in XCEVE as well as RIT and SPLIT modes. The RF board is the top one in the stack, and C54 is located in the upper left-hand quadrant (when viewed from the front of the rig). Another problem noted with the Rev 4C EPROM: an RIT or SPLIT receive/transmit offset of more than 3 to 5 kHz (depending on the band) resulted in noticeable "chirp" on the keyed signal monitored on another receiver. The chirp became very pronounced at offsets of 10kHz or more. With the Rev 03 EPROM installed, I could not detect any noticeable chip below a receive/transmit offset of 15 to 20 kHz (depending on band). The Rev 4C EPROM provides less delay between key-down and transmitter output in order to accommodate faster external keying (see above), but this reduced delay does not give the PLL sufficient time to stabilize the VCO frequency. I have seen complaints from others about chirp with this EPROM even with no RIT offset, so the PLL settling time may vary somewhat from rig to rig. The good news is that the chirp CAN be cured -- at least for receive/transmit offsets that are not too great -- by replacing a couple of caps on the LO board. The bad news is that the LO board is the third one down in the stack. I changed C43 and C44 from 4.7uF (original values) to 2.2 uF, and now I don't notice any keying chirp for receive/transmit offsets of at least 20 kHz. This is good enough for "DX split" operation, which is typically no more than 10 kHz on CW. Some care is in order when mucking about with these cap values; reducing the values too much can result in the PLL becoming unstable. I did not try to determine how much lower than 2.2uF can be safely used since that value seems to do the trick. C43 and C44 are located near the LO board's right-hand rear edge (when viewed from the front of the rig). I have seen reports that the Rev 4C EPROM produces more pronounced key- clicks in the side tone. I have installed mods in my rig that greatly reduce keying clicks and thumps in the audio output, and I did not notice any change in the sidetone after installing the new EPROM. However, the reduced keying delay (with the new EPROM) could well result in a noticeable increase in the key-down click in unmodified rigs. (The descriptions of these modes were included in my posting for reducing AGC thump some time ago and are available on request.) SCAF Response Changes --------------------- Replacing the Rev 03 EPROM with Rev 4C chip resulted in different SCAF bandpass characteristics for filter width settings of 1.0 and below. The approximate 6 dB bandpass edges and center frequencies for a few filter settings are compared in the table below (frequencies are in Hertz). Width | Rev 03 | Rev 4C Setting | low center high | low center high -----------|----------------------------|---------------------------- 0.8 | 410 905 1400 | 600 1095 1590 0.4 | 410 705 1000 | 600 895 1190 0.2 | 410 600 790 | 600 795 990 My filter width measurements weren't the most precise, but they WERE performed with the AGC disabled (just in case anyone asks...). The new filter characteristics are more consistent with the receive/transmit offset of about 700 Hz (I measured 720 Hz on my rig). Using the narrowest filter settings (0.3 and below) with the older EPROMs can result in inadvertently listening about 100 Hz (or more) below the transmit frequency if the received signal is centered in the filter passband. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Copyright (c) 1996 by Larry East, W1HUE May be reproduced if proper credit is given and not quoted out of context. From lve1@inel.gov Thu Sep 19 12:28:52 1996 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.1/8.7.1) with ESMTP id MAA12827 for ; Thu, 19 Sep 1996 12:28:49 -0400 (EDT) X-Received-x: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.1/8.7.1) with ESMTP id MAA12827 for ; Thu, 19 Sep 1996 12:28:49 -0400 (EDT) Received: from pc-lve1 ([134.20.194.51]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA15273; Thu, 19 Sep 1996 10:27:55 -0600 Message-Id: <2.2.16.19960919162726.14573c0a@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Thu, 19 Sep 1996 10:27:26 -0600 To: pepperb@gov.on.ca, Charlie Lofgren , bkassel@enet.net (Brian Kassel), Paul Erickson , Mike Rioux , John Dundas , af852@rgfn.epcc.Edu (William R Colbert), Bob_Tellefsen-CNSE97@email.mot.com, Christoph Zehntner , GREGOIRE@ENDOR.COM (ERNEST GREGOIRE), jdorson@bbs.mpcs.com (John Dorson), "GaryNye" , Bill Acito , "Mark B. Peterson" <70233.1106@CompuServe.COM>, bfollett@ditell.com, bcutter@teal.csn.net (Bob Cutter), john@antenna.demon.co.uk, "Francis A. McCrackin" , "Richard Hieber" , "JOHN F. McCLUN" , MCDANIELD@ouvaxa.cats.ohiou.edu, Norbert.Heyder@erno.de, N5EM@aol.com, larsennc@alaska.net (Nancy-KL7NY/Jim-AL7FS/Juliann-WL7MP), "Jerry L. Bartachek" , "Alvin G. Gann" , Peter Zenker <100743.3320@CompuServe.COM>, Wolfgang Schwarz <101511.61@CompuServe.COM>, Jerry KD0CA , jim_kc1fb@usa.pipeline.com (Jim Francoeur KC1FB), DYARNES@aol.com, tavan@tibco.com, "Bob Barry" , dgf@netcom.com (David Feldman), john andrews , Joel Malman , Dean Marzocca , rwright@soml.com (Robert Wright), Anders Wandahl , , rcmcc@cc.bellcore.com (ronald c mcconnell), , Scott Cranston , William McFadden , "Taylor Greg" , Art Winterbauer , , cookes@pop.jaring.my (Siong Teck Cheun @ Joseph), BERGESON@PPCC.CCCOES.EDU, George Gingell , "Doyle, Ron" From: lve1@inel.gov (Larry V East) Subject: General Information Status: RO Good morning/afternoon/evening (depending on your time zone...)! You are receiving this message because your email address is present in my "QRP-PLUS Mods and Information" address list. If you are no longer interested in receiving information on QRP-PLUS mods, measurements, etc. please let me know and I will remove you from the list. This is NOT an email reflector, but simply a private list of people who have expressed interest in receiving QRP-PLUS info. I created this list primarily to eliminate posting information on QRP-L that is of little or no interest to the majority of its subscribers. If you would like to send information on mods or measurements you have made to members of this list, you can send it to me and I will forward it. HOWEVER... if I get more than a few requests per week, I may well withdraw the offer! :-) Don't expect instant response as I am often busy or out of town for a few days. I have made several general postings to the list; if you have been recently added, you probably missed some of them. You can request copies by sending email to me with the following in the body of the message: SEND FILE where is one of the following: THUMP -- describes a simple audio limiter to reduce the effect of "AGC thump". A couple of other mods to eliminate clicks and thumps in the sidetone monitor are also described. COMPARE -- some comparisons that I made between my modified QRP+ and a relatively new QRP++. This information also appeared in the July 1996 issue of the ARCI QRP Quarterly. FILTER -- describes new transmit output filters that I installed in my rig. EPROM -- contains some comparisons between the Rev 03 and Rev 4C EPROMs. The same message can contain multiple requests -- just put them at the beginning of the message so that I don't miss them. UPPER or lower case is OK. NOTE: If you wish to further distribute any information received via this mailing list, please give proper credit and do not quote out of context! If you wish to publish any of the information in any form (newsletter, etc.), please be kind enough to ask the author(s) for permission. _________________________________________________________ "Any opinions expressed herein are my own and probably do not agree with those of my employer, the U.S. Government or my spouse" --... ...-- Larry V. East (W1HUE) Idaho Falls, ID e-mail: LVE1@inel.gov work: (208) 526-0081 home: (208) 529-2162 From owner-qrp-l@Lehigh.EDU Sun Sep 8 13:07:29 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.1/8.7.1) with ESMTP id NAA04033 for ; Sun, 8 Sep 1996 13:07:27 -0400 (EDT) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.1/8.7.1) with ESMTP id NAA04033 for ; Sun, 8 Sep 1996 13:07:27 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <175808-29099>; Sun, 8 Sep 1996 13:01:04 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <175732-41390>; Sun, 8 Sep 1996 13:00:15 -0400 Received: from omail.eee.org (omail.eee.org [163.150.1.3]) by nss2.CC.Lehigh.EDU (8.7.5/8.7.3) with ESMTP id MAA57910 for ; Sun, 8 Sep 1996 12:59:59 -0400 Received: from mickey.sbcss.k12.ca.us (mcinet.sbcss.k12.ca.us) by omail.eee.org with SMTP (1.39.111.2/16.2) id AA287821871; Sun, 8 Sep 1996 09:57:52 -0700 Message-Id: <3232FA6A.3B6E@eee.org> Date: Sun, 08 Sep 1996 09:55:06 -0700 Reply-To: jm165723@eee.org Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: john andrews To: "Low Power Amateur Radio Discussion" Subject: Re: Berlin Files on Index Labs QRP+/QRP++ References: <960908121116_518247878@emout08.mail.aol.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-To: NoesisDG@aol.com X-Cc: qrp-l@Lehigh.EDU X-Mailer: Mozilla 2.01KIT (Win95; U) X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO NoesisDG@aol.com wrote: > > Can anyone help me with a URL (preferably to an English language web page) > for a Berlin QRP club that carries mods and firmware changes for the Index > Labs QRP++/QRP++? > > When I spoke to Bruce Franklin at Index Labs some time ago he mentioned that > there was a group of enthusiasts in Germany who had disassembled and > commented at least part of the firmware coding for the QRP+ (it tickled him > that someone was taking the time to do that). He's not on the Internet so > couldn't provide any URLs. > > I have a couple of firmware mods (one to change the fast tuning rate for the > frequency dial) that I worked out with Bruce but would like to see more. > > Thanks guys! > > David Gwillim KB2TQX/QRP QRP-L #679 Sorry, David, feeling a little silly right now. The mods for the QRP+ are right under my nose. Try the QRP-L ftp site under /mods/ I think the Larry East mods are there as well. 72, John- N5INZ/6 From owner-qrp-l@Lehigh.EDU Mon Sep 9 17:30:24 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.1/8.7.1) with ESMTP id RAA18578 for ; Mon, 9 Sep 1996 17:30:23 -0400 (EDT) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.1/8.7.1) with ESMTP id RAA18578 for ; Mon, 9 Sep 1996 17:30:23 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <174774-41306>; Mon, 9 Sep 1996 17:23:18 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <174489-57687>; Mon, 9 Sep 1996 17:18:49 -0400 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by nss2.CC.Lehigh.EDU (8.7.5/8.7.3) with ESMTP id RAA106682 for ; Mon, 9 Sep 1996 17:18:39 -0400 Received: from pc-lve1 ([134.20.194.51]) by eloi.inel.gov (post.office MTA v1.9.3 ID# 0-12374) with SMTP id AAA1391 for ; Mon, 9 Sep 1996 15:19:06 -0600 Message-Id: <2.2.16.19960909211820.18ef3a32@eloi> Date: Mon, 09 Sep 1996 15:18:20 -0600 Reply-To: lve1@inel.gov Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: lve1@inel.gov (Larry V East) To: "Low Power Amateur Radio Discussion" Subject: QRP+/QRP++ Output Filters - Clarification Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO A point of clarification -- unless the recent review in QST prompted Index to make a change, the transmitter output filters in the "New Improved QRP++" are the same as the ones in the "Old QRP+". The filters for 160M thru 40M are "elliptic" design and provide at least 40dB of harmonic attenuation. The filters for bands above 40M are shared between two bands -- one filter for 30M and 20M, one for 17M and 15M and one for 12M and 10M. These filters are NOT elliptic (for some strange reason) and in some cases the harmonic attenuation is less than 40dB but (usually) greater than 30dB. The US FCC requires spurious radiations to be at least 30dB below the carrier for amateur HF transmitters running 5W or less, and at least 40dB below the carrier above 5W. A QRP+/QRP++ will (usually) meet this requirement if output power is limited to 5W, but not on some of the higher bands at >5W output. Some countries require harmonic emissions to be >40dB below the carrier at any output power level. My previous post stated that I have new output filter designs that will provide >45dB harmonic attenuation for the bands above 40M. (Send me email if you want the design info.) There is another problem regarding 12M spurs that CANNOT be eliminated by the output filter as they are very close to the carrier frequency. These spurs are (just barely) >30dB below the carrier in the QRP++, but NOT the QRP+ (at least not mine). I have an idea for fixing the 12M spur problem, but I haven't had tome to try it. Hopefully I'll have it done before the sun spots return. :-) I hope that everything is all perfectly clear now... :-) :-) 72, Larry W1HUE/7 From lve1@inel.gov Mon Sep 23 11:25:24 1996 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA25303 for ; Mon, 23 Sep 1996 11:25:20 -0400 (EDT) X-Received-x: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA25303 for ; Mon, 23 Sep 1996 11:25:20 -0400 (EDT) Received: from pc-lve1 ([134.20.194.51]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAF2876; Mon, 23 Sep 1996 09:24:45 -0600 Message-Id: <2.2.16.19960923152329.1c6f9594@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Mon, 23 Sep 1996 09:23:29 -0600 To: pepperb@gov.on.ca, Charlie Lofgren , bkassel@enet.net (Brian Kassel), Paul Erickson , Mike Rioux , John Dundas , af852@rgfn.epcc.Edu (William R Colbert), Bob_Tellefsen-CNSE97@email.mot.com, Christoph Zehntner , GREGOIRE@ENDOR.COM (ERNEST GREGOIRE), jdorson@bbs.mpcs.com (John Dorson), "GaryNye" , Bill Acito , "Mark B. Peterson" <70233.1106@CompuServe.COM>, bfollett@ditell.com, bcutter@teal.csn.net (Bob Cutter), john@antenna.demon.co.uk, "Francis A. McCrackin" , "Richard Hieber" , "JOHN F. McCLUN" , MCDANIELD@ouvaxa.cats.ohiou.edu, Norbert.Heyder@erno.de, N5EM@aol.com, larsennc@alaska.net (Nancy-KL7NY/Jim-AL7FS/Juliann-WL7MP), "Jerry L. Bartachek" , "Alvin G. Gann" , Peter Zenker <100743.3320@CompuServe.COM>, Wolfgang Schwarz <101511.61@CompuServe.COM>, Jerry KD0CA , jim_kc1fb@usa.pipeline.com (Jim Francoeur KC1FB), DYARNES@aol.com, tavan@tibco.com, "Bob Barry" , dgf@netcom.com (David Feldman), john andrews , Joel Malman , Dean Marzocca , rwright@soml.com (Robert Wright), Anders Wandahl , , rcmcc@cc.bellcore.com (ronald c mcconnell), , Scott Cranston , William McFadden , "Taylor Greg" , Art Winterbauer , , cookes@pop.jaring.my (Siong Teck Cheun @ Joseph), BERGESON@PPCC.CCCOES.EDU, George Gingell , "Doyle, Ron" , "Gert, SM5LWC" From: lve1@inel.gov (Larry V East) Subject: QRP+ Memory Channels Status: RO George asked me to forward the following to the QRP+ Mail List: >Return-Path: >Date: Thu, 19 Sep 1996 16:16:09 -0400 (EDT) >From: George Gingell >To: Larry East >Subject: QRP+ Memory Channels > >Larry, >I realise that this is probably old hat to you, but I thought I would >pass it along for anyone who might be interested. When I got my rig >back from Index Labs recently. It had blown the Final Mysteriously. >I think it was related to the loose foot on the bottom of the rig. It >has a ground lug under the same screw inside. It worked perfectly on >Field Day in the Car. I went to use it in the house for the weekly QRP >Net on Saturday morning the following week, I t came on briefly then >Started blowing fuses. Lesson learned, Check the screws for tightness >before fireing it up after a field trip. :^) (Or risk letting the smoke >out!) Back to the contribution. This is a list of the Factory Default >Frequencies and my new list of preferred settings. I was thinking of >sending out an inquiry to other QRP+ owners for a copy of their >personal preferred frequency list. My thought was that we might discover >where the real QRP Hot Spots were located? So, for what it is worth, here >it goes. >---------------------QRP + Settings of QRP+ # 0306 ----------------------- >Chuck, 3 A.M.- September 7, 1996 > > >Here a few additional comments. Not sure what happens if I exceed five lines :-) > > >COM> I hope I finish this in time, I have put in at least four hours overtime >COM> on this and I am supposed to be on vacation :-). >COM> How about a survey on What are your favorite Frequencies? >COM> Not just the "Standard QRP Frequencies," But where do you hang out ? >COM> How about A TMPS Report on what Freq you worked each State? >COM> Now that would be useful. >COM> I thought of this while trying to reprogram my QRP Plus Memory channels. >COM> I would especially like to see a list of QRP Plus Memory Channel Lists. >COM> I hope I finish this in time, I have put in at least four hours overtime >COM> on this and I am supposed to be on vacation :-). >COM> How about a survey on What are your favorite Frequencies? >COM> Not just the "Standard QRP Frequencies," But where do you hang out ? >COM> How about A TMPS Report on what Freq you worked each State? >COM> Now that would be useful. >COM> I thought of this while trying to reprogram my QRP Plus Memory channels. >COM> I would especially like to see a list of QRP Plus Memory Channel Lists. >COM> Since I didn't do TMPS, I can't give you a list of frequencies used. >COM> I think it might be interesting to see which are the HOT spots, and it >COM> might be useful to list the Beacons, Broadcast, Commercial and any other >COM> points of interest on the band for the benefit of those New Kids on the >COM> block. >COM> I will include my QRP PLUS Memory Channel Program List for a start. >COM> I think it will help define where the real aqction can be found. > >QRP DX TU (C) 1986, G. Danny Gingell, K3TKS@abs.net >Maryland Milliwatt Club QRP Reference Library, (301)572-6789 > > INDEX LABS QRP PLUS - K3TKS - Serial # 0306 Memory Storage Assignments >--------------------------------------------------------------------------- >Memory Channel # Frequency Assigned Factory Default Settings > CW Mode SSB Mode >--------------------------------------------------------------------------- >CH # 01 1.810.0 Mhz 1.819.6 Mhz 1.820.3 Mhz. >CH # 02 3.535.0 Mhz 1.949.6 Mhz 1.950.3 Mhz. >CH # 03 3.560.0 Mhz 3.559.6 Mhz 3.560.3 Mhz. >CH # 04 3.710.0 Mhz 3.989.6 Mhz 3.990.3 Mhz. >CH # 05 3.855.0 Mhz 7.039.6 Mhz 7.040.3 Mhz. >CH # 06 7.030.0 Mhz 7.139.6 Mhz 7.140.3 Mhz. >CH # 07 7.040.0 Mhz 10.116.3 Mhz 10.115.6 Mhz. >CH # 08 7.110.0 Mhz 10.123.3 Mhz 10.122.6 Mhz. >CH # 09 7.285.0 Mhz 14.060.3 Mhz 14.059.6 Mhz. >CH # 10 10.106.0 Mhz 14.250.3 Mhz 14.249.6 Mhz. >CH # 11 10.120.0 Mhz 18.070.3 Mhz 18.069.6 Mhz. >CH # 12 14.060.0 Mhz 18.120.3 Mhz 18.119.6 Mhz. >CH # 13 14.285.0 Mhz 21.060.3 Mhz 21.059.6 Mhz. >CH # 14 18.070.0 Mhz 21.400.3 Mhz 21.399.6 Mhz. >CH # 15 21.060.0 Mhz 24.900.3 Mhz 24.899.6 Mhz. >CH # 16 21.285.0 Mhz 24.920.3 Mhz 24.919.6 Mhz. >CH # 17 24.900.0 Mhz 28.060.3 Mhz 28.059.6 Mhz. >CH # 18 28.060.0 Mhz 28.350.3 Mhz 28.349.6 Mhz. >CH # 19 28.332.0 Mhz 30.053.3 Mhz 30.052.6 Mhz. >CH # 20 30.000.0 Mhz 30.053.3 Mhz 30.052.6 Mhz. > >Note: default Moode comes up in SSB Mode on Memory Channel # 05 = 7.040.3 Mhz. >Channels 19 & 20 are exactly alike. Making it appear that there are only 19 >memory channels. > >QRP DX TU (C) 1986 G.Danny Gingell, K3TKS@.abs.net >Maryland Milliwatt Club QRP Reference Library, (301)572-6789 > > > From lve1@inel.gov Wed Sep 25 11:10:54 1996 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA05801 for ; Wed, 25 Sep 1996 11:10:53 -0400 (EDT) X-Received-x: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA05801 for ; Wed, 25 Sep 1996 11:10:53 -0400 (EDT) Received: from pc-lve1 ([134.20.194.51]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA9782; Wed, 25 Sep 1996 09:10:33 -0600 Message-Id: <2.2.16.19960925150902.1877abfa@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Wed, 25 Sep 1996 09:09:02 -0600 To: pepperb@gov.on.ca, Charlie Lofgren , bkassel@enet.net (Brian Kassel), Paul Erickson , Mike Rioux , John Dundas , af852@rgfn.epcc.Edu (William R Colbert), Bob_Tellefsen-CNSE97@email.mot.com, Christoph Zehntner , GREGOIRE@ENDOR.COM (ERNEST GREGOIRE), jdorson@bbs.mpcs.com (John Dorson), "GaryNye" , Bill Acito , "Mark B. Peterson" <70233.1106@CompuServe.COM>, bfollett@ditell.com, bcutter@teal.csn.net (Bob Cutter), john@antenna.demon.co.uk, "Francis A. McCrackin" , "Richard Hieber" , "JOHN F. McCLUN" , MCDANIELD@ouvaxa.cats.ohiou.edu, Norbert.Heyder@erno.de, N5EM@aol.com, larsennc@alaska.net (Nancy-KL7NY/Jim-AL7FS/Juliann-WL7MP), "Jerry L. Bartachek" , "Alvin G. Gann" , Peter Zenker <100743.3320@CompuServe.COM>, Wolfgang Schwarz <101511.61@CompuServe.COM>, Jerry KD0CA , jim_kc1fb@usa.pipeline.com (Jim Francoeur KC1FB), DYARNES@aol.com, tavan@tibco.com, "Bob Barry" , dgf@netcom.com (David Feldman), john andrews , Joel Malman , Dean Marzocca , rwright@soml.com (Robert Wright), Anders Wandahl , , rcmcc@cc.bellcore.com (ronald c mcconnell), , Scott Cranston , William McFadden , "Taylor Greg" , Art Winterbauer , , cookes@pop.jaring.my (Siong Teck Cheun @ Joseph), BERGESON@PPCC.CCCOES.EDU, George Gingell , "Doyle, Ron" , "Gert, SM5LWC" , From: lve1@inel.gov (Larry V East) Subject: Preselector Status: RO Norbert, DL8BDF, posted a description of a preselector on QRP-L that he is using with his QRP+. If anyone did not get it and would like a copy, let me know and I will forward a copy. Simply send me email with the following in the message body: send file preselect 72, Larry W1HUE/7 From lve1@inel.gov Fri Sep 27 12:32:56 1996 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id MAA13698 for ; Fri, 27 Sep 1996 12:32:54 -0400 (EDT) X-Received-x: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id MAA13698 for ; Fri, 27 Sep 1996 12:32:54 -0400 (EDT) Received: from pc-lve1 ([134.20.194.51]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA18321; Fri, 27 Sep 1996 10:32:55 -0600 Message-Id: <2.2.16.19960927163103.48077f08@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Fri, 27 Sep 1996 10:31:03 -0600 To: pepperb@gov.on.ca, Charlie Lofgren , bkassel@enet.net (Brian Kassel), Paul Erickson , Mike Rioux , John Dundas , af852@rgfn.epcc.Edu (William R Colbert), Bob_Tellefsen-CNSE97@email.mot.com, Christoph Zehntner , GREGOIRE@ENDOR.COM (ERNEST GREGOIRE), jdorson@bbs.mpcs.com (John Dorson), "GaryNye" , Bill Acito , "Mark B. Peterson" <70233.1106@CompuServe.COM>, bfollett@ditell.com, bcutter@teal.csn.net (Bob Cutter), john@antenna.demon.co.uk, "Francis A. McCrackin" , "Richard Hieber" , "JOHN F. McCLUN" , MCDANIELD@ouvaxa.cats.ohiou.edu, Norbert.Heyder@erno.de, N5EM@aol.com, larsennc@alaska.net (Nancy-KL7NY/Jim-AL7FS/Juliann-WL7MP), "Jerry L. Bartachek" , "Alvin G. Gann" , Peter Zenker <100743.3320@CompuServe.COM>, Wolfgang Schwarz <101511.61@CompuServe.COM>, Jerry KD0CA , jim_kc1fb@usa.pipeline.com (Jim Francoeur KC1FB), DYARNES@aol.com, tavan@tibco.com, "Bob Barry" , dgf@netcom.com (David Feldman), john andrews , Joel Malman , Dean Marzocca , rwright@soml.com (Robert Wright), Anders Wandahl , , rcmcc@cc.bellcore.com (ronald c mcconnell), , Scott Cranston , William McFadden , "Taylor Greg" , Art Winterbauer , , cookes@pop.jaring.my (Siong Teck Cheun @ Joseph), BERGESON@PPCC.CCCOES.EDU, George Gingell , "Doyle, Ron" , "Gert, SM5LWC" , From: lve1@inel.gov (Larry V East) Subject: Norbert's Preselector Status: RO There appears to be some confusion/misunderstanding as to the purpose of the preselector that Norbert, DL8BDF, built for his QRP+. Norbert's preselector is intended for use in reducing receiver front-end overload from strong off-frequency signals. This is a big problem in Europe where 100KW+ broadcast stations transmitting in the 31M and 49M bands really raise havoc with broad-band receiver front ends. This is particularly troublesome when operating on 30 and 40M (I know first-hand as I've operated from Europe). Adding a preselector to the QRP+ probably won't make that much difference in North America -- except perhaps on the US east coast. 72, Larry W1HUE/7 (ex OE1ZES, W1HUE/SM3, W1HUE/G, opr 4U1VIC) From Bob_Tellefsen-CNSE97@email.mot.com Fri Sep 27 21:01:34 1996 Received: from motgate2.mot.com (motgate2.mot.com [129.188.136.20]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id VAA17369 for ; Fri, 27 Sep 1996 21:01:33 -0400 (EDT) X-Received-x: from motgate2.mot.com (motgate2.mot.com [129.188.136.20]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id VAA17369 for ; Fri, 27 Sep 1996 21:01:33 -0400 (EDT) Received: from pobox.mot.com (pobox.mot.com [129.188.137.100]) by motgate2.mot.com (8.7.3/8.6.10/MOT-3.8) with ESMTP id AAA01695; Sat, 28 Sep 1996 00:46:33 GMT Received: from azbx.mot.com (azbx.mot.com [129.188.127.40]) by pobox.mot.com (8.7.3/8.6.10/MOT-3.8) with SMTP id NAA08630; Fri, 27 Sep 1996 13:29:33 -0500 (CDT) Received: by azbx.mot.com (1.38.193.5/16.2) id AA06746; Fri, 27 Sep 1996 13:29:18 -0500 Date: Fri, 27 Sep 1996 11:22:00 -0500 From: "Bob Tellefsen-CNSE97" Message-Id: Subject: Re: Norbert's Preselector To: lve1@inel.gov (Receipt Notification Requested), pepperb@gov.on.ca (Receipt Notification Requested), clofgren@BENSON.MCKENNA.EDU (Receipt Notification Requested), bkassel@enet.net (Receipt Notification Requested), paul1@wizard.ucs.sfu.ca (Receipt Notification Requested), mrioux@usa1.com (Receipt Notification Requested), ab6dg@netcom.com (Receipt Notification Requested), af852@rgfn.epcc.Edu (Receipt Notification Requested), zehntner@grd.admin.ch (Receipt Notification Requested), GREGOIRE@ENDOR.COM (Receipt Notification Requested), jdorson@bbs.mpcs.com (Receipt Notification Requested), gcnye@brutus.bright.net (Receipt Notification Requested), acito@ultranet.com (Receipt Notification Requested), 70233.1106@CompuServe.COM (Receipt Notification Requested), bfollett@ditell.com (Receipt Notification Requested), bcutter@teal.csn.net (Receipt Notification Requested), john@antenna.demon.co.uk (Receipt Notification Requested), wb6lma@cdsnet.net (Receipt Notification Requested), Richard.Hieber@rrze.uni-erlangen.de (Receipt Notification Requested), JFM001@DENTAL3.AB.UMD.EDU (Receipt Notification Requested), MCDANIELD@ouvaxa.cats.ohiou.edu (Receipt Notification Requested), Norbert.Heyder@erno.de (Receipt Notification Requested), N5EM@aol.com (Receipt Notification Requested), larsennc@alaska.net (Receipt Notification Requested), jbartac@max.state.ia.us (Receipt Notification Requested), jgann@mindspring.com (Receipt Notification Requested), 100743.3320@CompuServe.COM (Receipt Notification Requested), 101511.61@CompuServe.COM (Receipt Notification Requested), jim_kc1fb@usa.pipeline.com (Receipt Notification Requested), DYARNES@aol.com (Receipt Notification Requested), tavan@tibco.com (Receipt Notification Requested), rbarry@VNET.IBM.COM (Receipt Notification Requested), dgf@netcom.com (Receipt Notification Requested), jm165723@eee.org (Receipt Notification Requested), malman@BBN.COM (Receipt Notification Requested), n2tnn@ifu.net (Receipt Notification Requested), rwright@soml.com (Receipt Notification Requested), aw@lib.kth.se (Receipt Notification Requested), w7ls@brigadoon.com (Receipt Notification Requested), rcmcc@cc.bellcore.com (Receipt Notification Requested), Peter_Simpson@3mail.3Com.COM (Receipt Notification Requested), cranston@zk3.dec.com (Receipt Notification Requested), wmcfadde@oucsace.cs.ohiou.edu (Receipt Notification Requested), GTAYLOR@ag-eco.tamu.edu (Receipt Notification Requested), art@comet.ucar.edu (Receipt Notification Requested), Mark_E_Gustoff@ccm.ch.intel.com (Receipt Notification Requested), cookes@pop.jaring.my (Receipt Notification Requested), BERGESON@PPCC.CCCOES.EDU (Receipt Notification Requested), k3tks@u1.abs.net (Receipt Notification Requested) X400-Mts-Identifier: [ /P=MOT/A=MOT/C=US/ ; c\lmpcc10\960927132457b ] X-Mailer: Worldtalk (4.0.2-p15)/STREAM Status: RO Larry (and group), I'm curious about another potential benefit from a preselector. This is timely as I have been contemplating building one myself. Since we have a front end that is about as selective as a vacuum cleaner, there is a tremendous amount of noise+signal bombarding the front end. My assumption is that a fairly narrow front end filter would reduce the total noise input. My question is whether we would notice any difference on receive. My QRP++ has more gain than I can use, so usually have my rf gain control backed off anyway. Insertion loss doesn't seem likely to be a problem. Wonder if anyone else has already experimented with this? Bob N6WG There appears to be some confusion/misunderstanding as to the purpose of the preselector that Norbert, DL8BDF, built for his QRP+. Norbert's preselector is intended for use in reducing receiver front-end overload from strong off-frequency signals. This is a big problem in Europe where 100KW+ broadcast stations transmitting in the 31M and 49M bands really raise havoc with broad-band receiver front ends. This is particularly troublesome when operating on 30 and 40M (I know first-hand as I've operated from Europe). Adding a preselector to the QRP+ probably won't make that much difference in North America -- except perhaps on the US east coast. 72, Larry W1HUE/7 (ex OE1ZES, W1HUE/SM3, W1HUE/G, opr 4U1VIC) Note: To assure proper delivery to all recipients, the following addresses have been moved from the header: - - - From aw@lib.kth.se Sun Sep 29 16:38:52 1996 Received: from kthbib.lib.kth.se (kthbib.lib.kth.se [130.237.29.3]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with SMTP id QAA21994 for ; Sun, 29 Sep 1996 16:38:46 -0400 (EDT) X-Received-x: from kthbib.lib.kth.se (kthbib.lib.kth.se [130.237.29.3]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with SMTP id QAA21994 for ; Sun, 29 Sep 1996 16:38:46 -0400 (EDT) Date: Sun, 29 Sep 1996 16:38:46 -0400 (EDT) Message-Id: <199609292038.QAA21994@oucsace.cs.ohiou.edu> Received: from sl43.modempool.kth.se by kthbib.lib.kth.se (MX V4.1 AXP) with SMTP; Sun, 29 Sep 1996 21:23:25 MET X-Sender: aw@kthbib.lib.kth.se X-Mailer: Windows Eudora Version 2.1.1 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable To: "Bob Tellefsen-CNSE97" From: Anders Wandahl Subject: Re: Norbert's Preselector CC: lve1@inel.gov (Receipt Notification Requested), pepperb@gov.on.ca (Receipt Notification Requested), clofgren@BENSON.MCKENNA.EDU (Receipt Notification Requested), bkassel@enet.net (Receipt Notification Requested), paul1@wizard.ucs.sfu.ca (Receipt Notification Requested), mrioux@usa1.com (Receipt Notification Requested), ab6dg@netcom.com (Receipt Notification Requested), af852@rgfn.epcc.Edu (Receipt Notification Requested), zehntner@grd.admin.ch (Receipt Notification Requested), GREGOIRE@ENDOR.COM (Receipt Notification Requested), jdorson@bbs.mpcs.com (Receipt Notification Requested), gcnye@brutus.bright.net (Receipt Notification Requested), acito@ultranet.com (Receipt Notification Requested), 70233.1106@CompuServe.COM (Receipt Notification Requested), bfollett@ditell.com (Receipt Notification Requested), bcutter@teal.csn.net (Receipt Notification Requested), john@antenna.demon.co.uk (Receipt Notification Requested), wb6lma@cdsnet.net (Receipt Notification Requested), Richard.Hieber@rrze.uni-erlangen.de (Receipt Notification Requested), JFM001@DENTAL3.AB.UMD.EDU (Receipt Notification Requested), MCDANIELD@ouvaxa.cats.ohiou.edu (Receipt Notification Requested), Norbert.Heyder@erno.de (Receipt Notification Requested), N5EM@aol.com (Receipt Notification Requested), larsennc@alaska.net (Receipt Notification Requested), jbartac@max.state.ia.us (Receipt Notification Requested), jgann@mindspring.com (Receipt Notification Requested), 100743.3320@CompuServe.COM (Receipt Notification Requested), 101511.61@CompuServe.COM (Receipt Notification Requested), jim_kc1fb@usa.pipeline.com (Receipt Notification Requested), DYARNES@aol.com (Receipt Notification Requested), tavan@tibco.com (Receipt Notification Requested), rbarry@VNET.IBM.COM (Receipt Notification Requested), dgf@netcom.com (Receipt Notification Requested), jm165723@eee.org (Receipt Notification Requested), malman@BBN.COM (Receipt Notification Requested), n2tnn@ifu.net (Receipt Notification Requested), rwright@soml.com (Receipt Notification Requested), aw@lib.kth.se (Receipt Notification Requested), w7ls@brigadoon.com (Receipt Notification Requested), rcmcc@cc.bellcore.com (Receipt Notification Requested), Peter_Simpson@3mail.3Com.COM (Receipt Notification Requested), cranston@zk3.dec.com (Receipt Notification Requested), wmcfadde@oucsace.cs.ohiou.edu (Receipt Notification Requested), GTAYLOR@ag-eco.tamu.edu (Receipt Notification Requested), art@comet.ucar.edu (Receipt Notification Requested), Mark_E_Gustoff@ccm.ch.intel.com (Receipt Notification Requested), cookes@pop.jaring.my (Receipt Notification Requested), BERGESON@PPCC.CCCOES.EDU (Receipt Notification Requested), k3tks@u1.abs.net (Receipt Notification Requested) Status: RO Hi... As said earlier the European situation is somewhat disturbing with such open front end as the QRP+ has. I have until just recently been almost unable to operate on 14 Mhz and above, evenings and nights due to strong QRM from BC stations and also strong coastal stations. The solution in my case was the St. Louis tuner. I must say that now in retrospect I could certainly live with a high SWR (thats what we are in this game for - to put as little power as possible in the air), but the big gain for me was a clean, healthy noise in the receiver. The problems with interferences seems to be dependant on the antenna used, as well. My friend Pea/SM0STM didn't suffer much from this plague at all on his R5, while I had severe problems on my G5RV... Thanks Larry for this dedicated QRP+ list!!=20 72=B4s Anders SM0HPL aw@lib.kth.se From owner-qrp-l@Lehigh.EDU Sun Sep 29 17:17:20 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id RAA23078 for ; Sun, 29 Sep 1996 17:17:19 -0400 (EDT) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id RAA23078 for ; Sun, 29 Sep 1996 17:17:19 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35381-16266>; Sun, 29 Sep 1996 17:16:22 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <34954-16266>; Sun, 29 Sep 1996 17:15:36 -0400 Received: from OBIWAN.ENDOR.COM (SYSTEM@obiwan.endor.com [199.103.183.1]) by nss2.CC.Lehigh.EDU (8.7.5/8.7.3) with SMTP id RAA05107 for ; Sun, 29 Sep 1996 17:15:32 -0400 Received: from Gregoire [199.103.183.143] by OBIWAN.ENDOR.COM with SMTP-OpenVMS via TCP/IP; Sun, 29 Sep 1996 17:16 EDT Message-Id: <199609292115.RAA05107@nss2.CC.Lehigh.EDU> Date: Sun, 29 Sep 1996 17:15:32 -0400 Reply-To: GREGOIRE@ENDOR.COM Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: GREGOIRE@ENDOR.COM (ERNEST GREGOIRE) To: "Low Power Amateur Radio Discussion" Subject: QRP+ mods.(RF GAIN,CW PWR ADJ) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Sender: GREGOIRE@ENDOR.COM X-Mailer: X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO Hello Gang, I really am sorry that I missed the CQWW RTTY, contest. RTTY and QRP go together swell and it's another mode to get your DXCC, or WAS, in. I'll be taking part in it next year for sure,and with a rig that is in much more capable. I did that RF gain mod that we discussed here on the list some time ago. While I had the rig all apart, I changed the pot on the rear of the rig. Now I can just reach over the top, and adjust the power by turning a knob. (RF GAIN MOD) Parts: 1, 10k pot, mil.spec. digi-key part no. 308-npc-103 This is a very small carbon pot. 1, .1 mfd. ceramic cap. 1, diode 4148 2, 10k 1/4 watt resistors. 1, machied aluminum knob digi-key part no. 10203nd (CW POWER MOD) Parts: 1, 1k pot mil.spec. digi-key part no. 308-npc-102 1, machined aluminum knob same part no. as above. I had to drill a new hole in the rear of the case. No big deal,really. I lined it up verticaly with the key jack. The new hole near the top of the case. Be sure to push the stack of boards forward when tightening them back down so the jacks stick out as close as possible to the surface of the rear panel. The 1k pot change went smoothly too. I enlarged the cw power hole to give me more play in assembling the rig. That new pot is larger than the old one and it's pretty tight in there. The pins of the pot come bent over so I straightend them out and rebent them to fit the old holes on the pcb. The rig works great with the new mods, and I hope to give it a good test in the next big contest when I wade in among the big guns with my QRP+. I have a digital schmatic of the RF mod. If you would like a copy, I'd be glad to send it to you privately. It is done with Windows Paint brush. I can also send it via S.A.S.E. if you like. de AA1IK N.E.-QRP-C. # 202 ( Lead by example, It is better to ) QRP-L member #95. ( pull a string than it is to push it.) Ernie Gregoire RR 1 Box 221 Canaan, NH. 03741 New England QRP Club, information available on request by sending me a S.A.S.E. or via E-mail. e-mail : GREGOIRE@ENDOR.COM packet : AA1IK@WA1WOK.FN43FE.NH.USA From owner-qrp-l@Lehigh.EDU Mon Sep 30 14:58:42 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id OAA16585 for ; Mon, 30 Sep 1996 14:58:38 -0400 (EDT) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id OAA16585 for ; Mon, 30 Sep 1996 14:58:38 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35159-44543>; Mon, 30 Sep 1996 14:58:04 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <35122-49409>; Mon, 30 Sep 1996 14:57:33 -0400 Received: from motgate2.mot.com (motgate2.mot.com [129.188.136.20]) by nss2.CC.Lehigh.EDU (8.8.0/8.8.0) with ESMTP id OAA51585 for ; Mon, 30 Sep 1996 14:57:25 -0400 Received: from pobox.mot.com (pobox.mot.com [129.188.137.100]) by motgate2.mot.com (8.7.3/8.6.10/MOT-3.8) with ESMTP id SAA10156 for ; Mon, 30 Sep 1996 18:52:50 GMT Received: from azbx.mot.com (azbx.mot.com [129.188.127.40]) by pobox.mot.com (8.7.3/8.6.10/MOT-3.8) with SMTP id NAA21803 for ; Mon, 30 Sep 1996 13:56:28 -0500 (CDT) Received: by azbx.mot.com (1.38.193.5/16.2) id AA07515; Mon, 30 Sep 1996 13:56:18 -0500 Message-Id: Date: Mon, 30 Sep 1996 11:35:00 -0500 Reply-To: Bob_Tellefsen-CNSE97@email.mot.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "Bob Tellefsen-CNSE97" To: "Low Power Amateur Radio Discussion" Subject: QRP++ X-To: qrp-l@Lehigh.EDU (Receipt Notification Requested) X-Mailer: Worldtalk (4.0.2-p15)/STREAM X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO I have added a very narrow audio filter to the audio section of my QRP++. Works extremely well, but naturally has some insertion loss. This is at the start of the audio chain, so I would like to insert a low-noise audio stage to make up the loss yet not degrade the noise figure. Can anyone suggest a device or circuit that would provide perhaps 10dB gain at low noise? Would need to be single ended for use off the existing 12v supply. Thanks and 72, Bob N6WG From Bob_Tellefsen-CNSE97@email.mot.com Mon Sep 30 16:45:56 1996 Received: from motgate2.mot.com (motgate2.mot.com [129.188.136.20]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id QAA26991 for ; Mon, 30 Sep 1996 16:45:55 -0400 (EDT) X-Received-x: from motgate2.mot.com (motgate2.mot.com [129.188.136.20]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id QAA26991 for ; Mon, 30 Sep 1996 16:45:55 -0400 (EDT) Received: from mothost.mot.com (mothost.mot.com [129.188.137.101]) by motgate2.mot.com (8.7.3/8.6.10/MOT-3.8) with ESMTP id UAA12604; Mon, 30 Sep 1996 20:30:04 GMT Received: from azbx (azbx.mot.com [129.188.127.40]) by mothost.mot.com (8.7.3/8.6.10/MOT-3.8) with SMTP id PAA04966; Mon, 30 Sep 1996 15:33:36 -0500 (CDT) Received: by azbx.mot.com (1.38.193.5/16.2) id AA07527; Mon, 30 Sep 1996 13:56:29 -0500 Date: Mon, 30 Sep 1996 11:50:00 -0500 From: "Bob Tellefsen-CNSE97" Message-Id: Subject: Re: Norbert's Preselector To: lve1@inel.gov (Receipt Notification Requested), pepperb@gov.on.ca (Receipt Notification Requested), clofgren@BENSON.MCKENNA.EDU (Receipt Notification Requested), bkassel@enet.net (Receipt Notification Requested), paul1@wizard.ucs.sfu.ca (Receipt Notification Requested), mrioux@usa1.com (Receipt Notification Requested), ab6dg@netcom.com (Receipt Notification Requested), af852@rgfn.epcc.Edu (Receipt Notification Requested), zehntner@grd.admin.ch (Receipt Notification Requested), GREGOIRE@ENDOR.COM (Receipt Notification Requested), jdorson@bbs.mpcs.com (Receipt Notification Requested), gcnye@brutus.bright.net (Receipt Notification Requested), acito@ultranet.com (Receipt Notification Requested), 70233.1106@CompuServe.COM (Receipt Notification Requested), bfollett@ditell.com (Receipt Notification Requested), bcutter@teal.csn.net (Receipt Notification Requested), john@antenna.demon.co.uk (Receipt Notification Requested), wb6lma@cdsnet.net (Receipt Notification Requested), Richard.Hieber@rrze.uni-erlangen.de (Receipt Notification Requested), JFM001@DENTAL3.AB.UMD.EDU (Receipt Notification Requested), MCDANIELD@ouvaxa.cats.ohiou.edu (Receipt Notification Requested), Norbert.Heyder@erno.de (Receipt Notification Requested), N5EM@aol.com (Receipt Notification Requested), larsennc@alaska.net (Receipt Notification Requested), jbartac@max.state.ia.us (Receipt Notification Requested), jgann@mindspring.com (Receipt Notification Requested), 100743.3320@CompuServe.COM (Receipt Notification Requested), 101511.61@CompuServe.COM (Receipt Notification Requested), jim_kc1fb@usa.pipeline.com (Receipt Notification Requested), DYARNES@aol.com (Receipt Notification Requested), tavan@tibco.com (Receipt Notification Requested), rbarry@VNET.IBM.COM (Receipt Notification Requested), dgf@netcom.com (Receipt Notification Requested), jm165723@eee.org (Receipt Notification Requested), malman@BBN.COM (Receipt Notification Requested), n2tnn@ifu.net (Receipt Notification Requested), rwright@soml.com (Receipt Notification Requested), aw@lib.kth.se (Receipt Notification Requested), w7ls@brigadoon.com (Receipt Notification Requested), rcmcc@cc.bellcore.com (Receipt Notification Requested), Peter_Simpson@3mail.3Com.COM (Receipt Notification Requested), cranston@zk3.dec.com (Receipt Notification Requested), wmcfadde@oucsace.cs.ohiou.edu (Receipt Notification Requested), GTAYLOR@ag-eco.tamu.edu (Receipt Notification Requested), art@comet.ucar.edu (Receipt Notification Requested), Mark_E_Gustoff@ccm.ch.intel.com (Receipt Notification Requested), cookes@pop.jaring.my (Receipt Notification Requested), BERGESON@PPCC.CCCOES.EDU (Receipt Notification Requested), k3tks@u1.abs.net (Receipt Notification Requested) X400-Mts-Identifier: [ /P=MOT/A=MOT/C=US/ ; c\lmpcc10\960930135141f ] X-Mailer: Worldtalk (4.0.2-p15)/STREAM Status: RO I understand Norbert's purpose in filtering his QRP+ front end. My question regards more of a general cleaning up of noise coming in through this very unselective front end. I notice that switching in the attenuator improves the signal to noise ratio, at least in my own location. This leads me to wonder if at least some of the noise I hear is really intermod from noise and signal at other parts of the hf spectrum. The attenuator seems to reduce the input signals below the intermod threshold, thereby reducing the reproduced noise. If this is truly the case, it seems to me a selective filter would also reduce or eliminate the "out of band" noise, without the insertion loss penalty of the attenuator. Does anyone have any experience or thoughts regarding this? 72, Bob N6WG There appears to be some confusion/misunderstanding as to the purpose of the preselector that Norbert, DL8BDF, built for his QRP+. Norbert's preselector is intended for use in reducing receiver front-end overload from strong off-frequency signals. This is a big problem in Europe where 100KW+ broadcast stations transmitting in the 31M and 49M bands really raise havoc with broad-band receiver front ends. This is particularly troublesome when operating on 30 and 40M (I know first-hand as I've operated from Europe). Adding a preselector to the QRP+ probably won't make that much difference in North America -- except perhaps on the US east coast. 72, Larry W1HUE/7 (ex OE1ZES, W1HUE/SM3, W1HUE/G, opr 4U1VIC) Note: To assure proper delivery to all recipients, the following addresses have been moved from the header: - - - From lve1@inel.gov Mon Oct 7 13:30:25 1996 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id NAA24046 for ; Mon, 7 Oct 1996 13:30:23 -0400 (EDT) X-Received-x: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id NAA24046 for ; Mon, 7 Oct 1996 13:30:23 -0400 (EDT) Received: from pc-lve1 ([134.20.194.51]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA21775; Mon, 7 Oct 1996 11:30:16 -0600 Message-Id: <2.2.16.19961007172909.279f4866@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Mon, 07 Oct 1996 11:29:09 -0600 To: pepperb@gov.on.ca, Charlie Lofgren , bkassel@enet.net (Brian Kassel), Paul Erickson , Mike Rioux , John Dundas , af852@rgfn.epcc.Edu (William R Colbert), Bob_Tellefsen-CNSE97@email.mot.com, Christoph Zehntner , GREGOIRE@ENDOR.COM (ERNEST GREGOIRE), jdorson@bbs.mpcs.com (John Dorson), "GaryNye" , Bill Acito , "Mark B. Peterson" <70233.1106@CompuServe.COM>, bfollett@ditell.com, bcutter@teal.csn.net (Bob Cutter), john@antenna.demon.co.uk, "Francis A. McCrackin" , "Richard Hieber" , "JOHN F. McCLUN" , MCDANIELD@ouvaxa.cats.ohiou.edu, Norbert.Heyder@erno.de, N5EM@aol.com, larsennc@alaska.net (Nancy-KL7NY/Jim-AL7FS/Juliann-WL7MP), "Jerry L. Bartachek" , "Alvin G. Gann" , Peter Zenker <100743.3320@CompuServe.COM>, Wolfgang Schwarz <101511.61@CompuServe.COM>, Jerry KD0CA , jim_kc1fb@usa.pipeline.com (Jim Francoeur KC1FB), DYARNES@aol.com, tavan@tibco.com, "Bob Barry" , dgf@netcom.com (David Feldman), john andrews , Joel Malman , Dean Marzocca , rwright@soml.com (Robert Wright), Anders Wandahl , , rcmcc@cc.bellcore.com (ronald c mcconnell), , Scott Cranston , William McFadden , "Taylor Greg" , Art Winterbauer , , cookes@pop.jaring.my (Siong Teck Cheun @ Joseph), BERGESON@PPCC.CCCOES.EDU, George Gingell , "Doyle, Ron" , "Gert, SM5LWC" , From: lve1@inel.gov (Larry V East) Subject: RIT/SPLIT indicator LED for QRP+ Status: RO I have a simple little circuit (two NPN transistors, 4 resistors, 1 cap and 1 LED) that I put together to give a visual indication (via an LED) when the XCVE/RIT/SPLIT switch on my QRP+ is NOT in the XCVE position. If interested, send me an email with send rit_led file in the text. The write-up will be sent as email with the schematic attached as a PCX file. If you can't handle attached files, I can get it to you via an SASE or perhaps upload it to an FTP site. If you can't view PCX files (Windows Paintbrush works OK), maybe I can get the schematic into another format (bitmap, Word for Windows, and encapsulated PostScript come immediately to mind). 72, Larry W1HUE/7 From owner-qrp-l@lehigh.edu Mon Nov 4 19:19:51 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id TAA05614 for ; Mon, 4 Nov 1996 19:19:50 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id TAA05614 for ; Mon, 4 Nov 1996 19:19:50 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35060-42237>; Mon, 4 Nov 1996 19:18:08 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <35048-30463>; Mon, 4 Nov 1996 19:17:14 -0500 Received: from OBIWAN.ENDOR.COM (SYSTEM@obiwan.endor.com [199.103.183.1]) by nss2.CC.Lehigh.EDU (8.8.2/8.8.2) with SMTP id TAA55685 for ; Mon, 4 Nov 1996 19:17:00 -0500 Received: from Gregoire.endor.com [199.103.183.143] by OBIWAN.ENDOR.COM with SMTP-OpenVMS via TCP/IP; Mon, 4 Nov 1996 19:17 EDT Message-Id: <199611050017.TAA55685@nss2.CC.Lehigh.EDU> Date: Mon, 4 Nov 1996 19:17:00 -0500 Reply-To: GREGOIRE@ENDOR.COM Sender: owner-qrp-l@lehigh.edu Precedence: bulk From: GREGOIRE@ENDOR.COM (ERNEST GREGOIRE) To: "Low Power Amateur Radio Discussion" Subject: Re: QRP-Plus upgrade: Worth it? Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Sender: GREGOIRE@ENDOR.COM X-Mailer: X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO Hello Emery, I have upgraded the orriginal QRP+ to the latest and greatest model. I believe that beauty is in the eye of the beholder. To me,a resounding yes. It was very much worth it. However!! Also upgraded by me, were the power pot, and also added the R.F. gain modification from Bruce Frankliln. I just tested that RF gain in the SS contest this weekend, and WOW, what a difference it made! This enabled the scaf filter for do it's thing properly. I had superior control of the selectivity of the rig. No contestor should be without this mod. I'll be testing it in the RTTY WAE contest this weekend. If it does for RTTY what it does for CW, I will be very happy. 73 de AA1IK Ernie From owner-qrp-l@Lehigh.EDU Thu Nov 7 09:17:14 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id JAA25687 for ; Thu, 7 Nov 1996 09:17:13 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id JAA25687 for ; Thu, 7 Nov 1996 09:17:13 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35396-3109>; Thu, 7 Nov 1996 09:15:56 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <35126-3109>; Thu, 7 Nov 1996 09:14:32 -0500 Received: from ns1.ptd.net (root@ns1.ptd.net [198.80.46.1]) by nss2.CC.Lehigh.EDU (8.8.2/8.8.2) with ESMTP id JAA67859 for ; Thu, 7 Nov 1996 09:14:24 -0500 Received: from 204.186.22.38 (cs3-6.con.ptd.net [204.186.22.38]) by ns1.ptd.net (8.8.2/8.8.0) with SMTP id JAA05986; Thu, 7 Nov 1996 09:14:21 -0500 (EST) Message-Id: <3281EE5A.1389@ptdprolog.net> Date: Thu, 07 Nov 1996 09:12:51 -0500 Reply-To: howardsh@ptdprolog.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Howard Sherer To: "Low Power Amateur Radio Discussion" Subject: mods wanted for older qrp+ MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: Mozilla 3.0 (Macintosh; I; PPC) X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO I just bought the older model index labs qrp+ It works great on cw but the ssb output is only 2 w. I saw the mod on yesterdays post to swamp out the alc and will give it a try. Are there any additional mods out there for this rig, and how do I look them up? Howard AE3T From lve1@inel.gov Thu Nov 7 11:11:15 1996 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA04938 for ; Thu, 7 Nov 1996 11:11:14 -0500 (EST) X-Received-x: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA04938 for ; Thu, 7 Nov 1996 11:11:14 -0500 (EST) Received: from pc-lve1 ([134.20.194.51]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAB4798; Thu, 7 Nov 1996 09:11:23 -0700 Message-Id: <2.2.16.19961107160826.18bf2102@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Thu, 07 Nov 1996 09:08:26 -0700 To: pepperb@gov.on.ca, Charlie Lofgren , bkassel@enet.net (Brian Kassel), Paul Erickson , Mike Rioux , John Dundas , af852@rgfn.epcc.Edu (William R Colbert), Bob_Tellefsen-CNSE97@email.mot.com, Christoph Zehntner , GREGOIRE@ENDOR.COM (ERNEST GREGOIRE), jdorson@bbs.mpcs.com (John Dorson), "GaryNye" , Bill Acito , "Mark B. Peterson" <70233.1106@CompuServe.COM>, bfollett@ditell.com, bcutter@teal.csn.net (Bob Cutter), john@antenna.demon.co.uk, "Francis A. McCrackin" , "Richard Hieber" , "JOHN F. McCLUN" , MCDANIELD@ouvaxa.cats.ohiou.edu, Norbert.Heyder@erno.de, N5EM@aol.com, larsennc@alaska.net (Nancy-KL7NY/Jim-AL7FS/Juliann-WL7MP), "Jerry L. Bartachek" , "Alvin G. Gann" , Peter Zenker <100743.3320@CompuServe.COM>, Wolfgang Schwarz <101511.61@CompuServe.COM>, Jerry KD0CA , jim_kc1fb@usa.pipeline.com (Jim Francoeur KC1FB), DYARNES@aol.com, tavan@tibco.com, "Bob Barry" , dgf@netcom.com (David Feldman), john andrews , Joel Malman , Dean Marzocca , rwright@soml.com (Robert Wright), Anders Wandahl , , rcmcc@cc.bellcore.com (ronald c mcconnell), , Scott Cranston , William McFadden , "Taylor Greg" , Art Winterbauer , , cookes@pop.jaring.my (Siong Teck Cheun @ Joseph), BERGESON@PPCC.CCCOES.EDU, George Gingell , "Doyle, Ron" , "Gert, SM5LWC" , , John Lockhart , Wayne Glover From: lve1@inel.gov (Larry V East) Subject: More SSB Power from "old" QRP+ Status: RO Just in case you missed it, this was posted on QRP-L yesterday: >Date: 06 Nov 96 03:58:39 EST >From: Markus Zimmermann <100724.2637@CompuServe.COM> >To: qrp-l >Subject: [3772] More SSB-power for 'old' QRP+ >Message-ID: <961106085839_100724.2637_EHU143-1@CompuServe.COM> > >Hello QRP+ owner >The max. power in SSB on my QRP+ (ser. nbr. 348) was limited to about 2.2W pep. >That's in my opinion not enough to run a SSB QSO on the lower bands. Since a few >month I tried several modifications, but without success. Last weekend I made >following mod which is very easy and gives you about 5 - 6W SSB power on all >bands. > >Solder across (parallel) to C12 (near to U2 MC334OP) on the AF-PCB board a 10K >trimpot. Adjust for max. power and monitor your signal with an other RX. Now you >are able to reduce the ALC. The modulation is still ok an so far I got good >reports on the band. > >Is this mod new for the group? Anyway good luck and best 72. > >Markus, HB9JNH >G-QRP 5120 > Here are my comments to Markus: >I saw this memtioned by one other person in a private email to me, but I don't think it is generally known. I was going to post it after trying it -- which I haven't done yet. > >I took another route to altering tha ALC, and found that I could increase the SSB power on the lower bands OK but the output audio was badly distorted on the higher bands (15M and above). So, that is something that you should check. 72, Larry W1HUE/7 From owner-qrp-l@lehigh.edu Thu Nov 7 11:46:44 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA07554 for ; Thu, 7 Nov 1996 11:46:43 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA07554 for ; Thu, 7 Nov 1996 11:46:43 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35166-15394>; Thu, 7 Nov 1996 10:56:13 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <35118-3109>; Thu, 7 Nov 1996 10:55:30 -0500 Received: from mhsgate.meth-mem.org ([198.254.16.35]) by nss2.CC.Lehigh.EDU (8.8.2/8.8.2) with SMTP id KAA171463 for ; Thu, 7 Nov 1996 10:55:16 -0500 Received: from NetWare MHS (SMF71) by mhsgate.meth-mem.org via Connect2-SMTP 4.00; Thu, 7 Nov 96 09:52:36 -0600 Message-Id: <4AB1813201172C16@mhsgate.meth-mem.org> Date: Thu, 7 Nov 96 09:52:10 -0600 Reply-To: cloudm@mhsgate.meth-mem.org Sender: owner-qrp-l@lehigh.edu Precedence: bulk From: Mike Cloud To: "Low Power Amateur Radio Discussion" Subject: RE: mods wanted for older qrp+ X-Sender: cloudm@mhsgate.meth-mem.org X-To: qrp-l@Lehigh.EDU (INTERNET) X-mailer: Connect2-SMTP 4.00 MHS to SMTP Gateway X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO > > From: Howard Sherer > >I just bought the older model index labs qrp+ It works great on cw but >the ssb output is only 2 w. I saw the mod on yesterdays post to swamp >out the alc and will give it a try. Are there any additional mods out >there for this rig, and how do I look them up? > >Howard AE3T > Hmmm? My qrp+ is SN #136 and while I rarely (never) use it SSB, when I initially got it I built up a mic from one of the little MFJ ht mics and put it on the air ssb. Using the gain adjustment in the back, I discovered that phone operation output was pretty variable depending on band, with a fairly steady output decline as the frequency increased. The big, but accurate, SWAN watt meter showed that the output ranged from about 12 watts on 80 meters to 7 watts on 10 meters (didn't try 160). The output could always be adjusted to 5 watts. All of this was into a dummy load to avoid antenna reactance. BTW, my qrp+ has not been mod'ded in any way and I plan to keep it that way, hi hi. cul de Mike, KR4IT From owner-qrp-l@Lehigh.EDU Thu Nov 7 11:46:49 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA07573 for ; Thu, 7 Nov 1996 11:46:48 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA07573 for ; Thu, 7 Nov 1996 11:46:48 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35436-3109>; Thu, 7 Nov 1996 11:29:07 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <35462-3109>; Thu, 7 Nov 1996 11:28:02 -0500 Received: from hungary.it.earthlink.net (hungary-c.it.earthlink.net [204.119.177.64]) by nss2.CC.Lehigh.EDU (8.8.2/8.8.2) with ESMTP id LAA140426 for ; Thu, 7 Nov 1996 11:27:28 -0500 Received: from 206.149.209.81 (max5-wc-ca-31.earthlink.net [206.149.209.81]) by hungary.it.earthlink.net (8.7.5/8.7.3) with SMTP id IAA14927; Thu, 7 Nov 1996 08:27:06 -0800 (PST) Message-Id: <32820E19.7EC6@earthlink.net> Date: Thu, 07 Nov 1996 08:28:09 -0800 Reply-To: kjlopez@earthlink.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Ken Lopez To: "Low Power Amateur Radio Discussion" Subject: Re: mods wanted for older qrp+ References: <4AB1813201172C16@mhsgate.meth-mem.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-To: cloudm@mhsgate.meth-mem.org X-Cc: Low Power Amateur Radio Discussion X-Mailer: Mozilla 2.0 (Macintosh; U; 68K) X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO My original QRP+, among other problems, had low output and high distortion on SSB. However, this may have been due to poor alignment and adjustment of the ALC. I know of some who did not have this problem, and others who could not adjust the ALC satisfactorily(me), necessitating a mod. Perhaps we are dealing with production changes during the year or so of original production. I would suggest that you call Bruce at Index Labs. He has always been straightforward and helpful with me. Also, the "update" is worth the $. The new QRP++ rig is superb. Ken, N6TZV From owner-qrp-l@Lehigh.EDU Thu Nov 7 11:46:50 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA07579 for ; Thu, 7 Nov 1996 11:46:49 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA07579 for ; Thu, 7 Nov 1996 11:46:49 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35266-3109>; Thu, 7 Nov 1996 11:11:38 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <35261-3109>; Thu, 7 Nov 1996 11:10:53 -0500 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by nss2.CC.Lehigh.EDU (8.8.2/8.8.2) with ESMTP id LAA154590 for ; Thu, 7 Nov 1996 11:10:45 -0500 Received: from pc-lve1 ([134.20.194.51]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA4798; Thu, 7 Nov 1996 09:11:20 -0700 Message-Id: <2.2.16.19961107160823.2077ce6c@eloi> Date: Thu, 07 Nov 1996 09:08:23 -0700 Reply-To: lve1@inel.gov Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: lve1@inel.gov (Larry V East) To: "Low Power Amateur Radio Discussion" Subject: RE: More SSB-power for 'old' QRP+ Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Cc: Markus Zimmermann <100724.2637@CompuServe.COM> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO >Is this mod new for the group? Anyway good luck and best 72. > >Markus, HB9JNH >G-QRP 5120 > I saw this memtioned by one other person in a private email to me, but I don't think it is generally known. I was going to post it after trying it -- which I haven't done yet. I took another route to altering tha ALC, and found that I could increase the SSB power on the lower bands OK but the output audio was badly distorted on the higher bands (15M and above). So, that is something that you should check. 72, Larry W1HUE/7 From owner-qrp-l@lehigh.edu Thu Nov 7 11:46:52 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA07588 for ; Thu, 7 Nov 1996 11:46:51 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA07588 for ; Thu, 7 Nov 1996 11:46:51 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35427-15394>; Thu, 7 Nov 1996 11:25:46 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <35409-36900>; Thu, 7 Nov 1996 11:24:54 -0500 Received: from comet.ucar.edu (spike.comet.ucar.edu [128.117.110.3]) by nss2.CC.Lehigh.EDU (8.8.2/8.8.2) with SMTP id LAA175161 for ; Thu, 7 Nov 1996 11:24:48 -0500 Received: from localhost ([0.0.0.0]) by comet.ucar.edu with SMTP id AA00430 (5.67b/IDA-1.4.4 for qrp-l@Lehigh.EDU); Thu, 7 Nov 1996 09:24:47 -0700 Message-Id: Date: Thu, 7 Nov 1996 09:24:46 -0700 (MST) Reply-To: art@comet.ucar.edu Sender: owner-qrp-l@lehigh.edu Precedence: bulk From: Art Winterbauer To: "Low Power Amateur Radio Discussion" Subject: Fix for damaged QRP+ S-meter Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-To: Low Power Amateur Radio Discussion X-Sender: art@spike X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO The S-meter on the QRP+ is used for measuring the strength of received signals as well as power output. The one on my rig hasn't been working for about a year now so I wondered if there was a fix for it without having to disassemble the whole thing to get to the meter. I think what messed it up to begin with was a very strong signal. I was testing a HB QRP transmitter by feeding its signal to a dummy load. The QRP+ was hooked up to my station antenna (instead of a little wire). When I was doing this series of tests, in one instance, I forgot to switch down the RF sensitivity on the QRP+. A few days later when using the QRP+ in normal operation, I noticed that received signals barely moved the S-meter, with local, strong hams only pushing it to S5 or so. On transmit, at a full 5 watts, originally the meter would peg. Now it only wiggles spasmodically between S-1 and S-3. Any clues to what damage I've caused? I'd be surprised if the S-meter itself is damaged. I think perhaps some other component(s) may have been damaged. Of course, I'm assuming that the strong signal it received caused this problem to begin with. In all other respects the rig seems to work per usual. This is an older, unmodified QRP+ (S/N 176). Please post your suggestions to the group in case someone else has encountered a similar problem with a QRP+ or other rig. 72! Art WA5OES From owner-qrp-l@Lehigh.EDU Fri Nov 8 07:27:51 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id HAA15285 for ; Fri, 8 Nov 1996 07:27:50 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id HAA15285 for ; Fri, 8 Nov 1996 07:27:50 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <34941-26784>; Fri, 8 Nov 1996 07:27:16 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <34863-42911>; Fri, 8 Nov 1996 07:26:24 -0500 Received: from gatekeeper.admin.ch (gatekeeper.admin.ch [193.5.216.41]) by nss2.CC.Lehigh.EDU (8.8.2/8.8.2) with SMTP id HAA166614 for ; Fri, 8 Nov 1996 07:26:17 -0500 Received: from wep.bb.admin.ch by gatekeeper.admin.ch; (5.65v3.2/1.1.8.2/07Sep95-1159AM) id AA13136; Fri, 8 Nov 1996 13:25:45 +0100 Message-Id: <"45423180116991/302369 GRDMRX*"@MHS> Date: Fri, 8 Nov 1996 13:24:54 +0000 Reply-To: Christoph.Z.C.Zehntner@FS161.grd.admin.ch Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Christoph Zehntner (Tel 031 324 61 16 ) To: "Low Power Amateur Radio Discussion" Subject: re: More SSB-power for 'old' QRP+ X-Cc: lve1@inel.gov X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO Hello qrp+ers I have made this mod (6k8 to pin 2 of U2 on AF board) a year ago on my qrp+ (serial number 727), Simon, another ham, has installed it for about 6 months. The power is between 5 and 8 watt and I always get good reports on the audio quality. Sometimes it is reported as sounding slightly compressed. I never checked the signal with measurement instruments. When I told Larry, W1HUE, about the mod two months ago, he wondered if there weren't any distortions. Well, recently I had a lot of trouble with my audio quality: the signal was heavely distorted an hardly understandable. First I removed the mod and it was less distorted but still bad; I listened to it with a second receiver. With a hint of Simon, I found that the distortion was due to rf coupling from my indoor antenna to the rig that was not well grounded either. With my external dipol I still had some coupling from my open feederline and atu. Now I have cleaned it all up, reinstalled the modification on U2 and it works without any problem: again I get nice audio quality reports. So I wonder, if any of you has made similar experiences with rf coupling into the qrp+ and I will be glad to hear from your mod results. I hope, Larry, you could do some real measurements once (and thanks for forwarding Markus' mail). 73 Chris, HB9AJP From lve1@inel.gov Sun Nov 10 14:10:35 1996 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id OAA29904 for ; Sun, 10 Nov 1996 14:10:33 -0500 (EST) X-Received-x: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id OAA29904 for ; Sun, 10 Nov 1996 14:10:33 -0500 (EST) Received: from pc-lve1 ([134.20.194.51]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAC21743; Sun, 10 Nov 1996 12:10:52 -0700 Message-Id: <2.2.16.19961110190736.1c37d270@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Sun, 10 Nov 1996 12:07:36 -0700 To: pepperb@gov.on.ca, Charlie Lofgren , bkassel@enet.net (Brian Kassel), Paul Erickson , Mike Rioux , John Dundas , af852@rgfn.epcc.Edu (William R Colbert), Bob_Tellefsen-CNSE97@email.mot.com, Christoph Zehntner , GREGOIRE@ENDOR.COM (ERNEST GREGOIRE), jdorson@bbs.mpcs.com (John Dorson), "GaryNye" , Bill Acito , "Mark B. Peterson" <70233.1106@CompuServe.COM>, bfollett@ditell.com, bcutter@teal.csn.net (Bob Cutter), john@antenna.demon.co.uk, "Francis A. McCrackin" , "Richard Hieber" , "JOHN F. McCLUN" , MCDANIELD@ouvaxa.cats.ohiou.edu, Norbert.Heyder@erno.de, N5EM@aol.com, larsennc@alaska.net (Nancy-KL7NY/Jim-AL7FS/Juliann-WL7MP), "Jerry L. Bartachek" , "Alvin G. Gann" , Peter Zenker <100743.3320@CompuServe.COM>, Wolfgang Schwarz <101511.61@CompuServe.COM>, Jerry KD0CA , jim_kc1fb@usa.pipeline.com (Jim Francoeur KC1FB), DYARNES@aol.com, tavan@tibco.com, "Bob Barry" , dgf@netcom.com (David Feldman), john andrews , Joel Malman , Dean Marzocca , rwright@soml.com (Robert Wright), Anders Wandahl , , rcmcc@cc.bellcore.com (ronald c mcconnell), , Scott Cranston , William McFadden , "Taylor Greg" , Art Winterbauer , , cookes@pop.jaring.my (Siong Teck Cheun @ Joseph), BERGESON@PPCC.CCCOES.EDU, George Gingell , "Doyle, Ron" , "Gert, SM5LWC" , , John Lockhart , Wayne Glover From: lve1@inel.gov (Larry V East) Subject: Mystery solved! Status: RO I could never understand how changing a resistor in the QRP++ to reduce the audio level into the SCAF could cure the "AGC Thump" problem. Well, it was finally explained to me in a letter from Bruce Franklin of Index Labs. Bruce wrote: "The new version of the QRP PLUS has back-to-back Shottky diodes [D2 and D3 on the RF board] connected as a limiter on the output IF stage. The purpose of the limiter is to prevent attack overload on the AGC. The limiting should occur about 6 dB above he AGC threshold. Unfortunately, a number of units were shipped with an incorrect value for R33 on the audio PCB. This spoiled the gain relationship with the result that the AGC improvement was not achieved. We sent out a letter and a resistor to he customers to correct the problem. With the correct relationship between the AGC threshold and the limiter, the AGC attack performance is very good on the new version." So... now I know! However, I suspect that the limiter being before the SCAF results in the following problem at narrow SCAF settings: Strong adjacent signals within the IF passband bout outside the SCAF passband will trigger the limiter resulting in the strength of the desired signal being drastically reduced resulting in an "inverse thump" affect. Am I correct? I also suspect that adding my audio limiter mod after the SCAF in a QRP++ with a properly functioning IF limiter will have little, if any affect. Am I correct in this also? I would greatly appreciate it if someone out there in cyberspace could let me know whether or not my assumptions are correct. I need this info for an article that has to be to the editor this coming week. 72, Larry W1HUE/7 From owner-qrp-l@Lehigh.EDU Mon Nov 25 20:56:28 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id UAA25657 for ; Mon, 25 Nov 1996 20:56:27 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id UAA25657 for ; Mon, 25 Nov 1996 20:56:27 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <34980-52009>; Mon, 25 Nov 1996 20:55:50 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <34974-44842>; Mon, 25 Nov 1996 20:55:29 -0500 Received: from emout10.mail.aol.com (emout10.mx.aol.com [198.81.11.25]) by nss2.CC.Lehigh.EDU (8.8.3/8.8.3) with SMTP id UAA178034 for ; Mon, 25 Nov 1996 20:55:23 -0500 Received: by emout10.mail.aol.com (8.6.12/8.6.12) id UAA19379 for QRP-L@lehigh.edu; Mon, 25 Nov 1996 20:54:52 -0500 Message-Id: <961125205451_1951120114@emout10.mail.aol.com> Date: Mon, 25 Nov 1996 20:54:52 -0500 Reply-To: Byron8LCZ@aol.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Byron8LCZ@aol.com To: "Low Power Amateur Radio Discussion" Subject: New QRP ant tuner X-To: QRP-L@Lehigh.EDU X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO Hi gang, Theres a new QRP antenna tuner on the block. Its the Index Labs "QRP Companion". Same size as the QRP Plus transceiver including the fold out stand on the bottom. It has a LC tuner, has 12 positions on the inductance switch, noise bridge for off the air tune ups, 4.5 amp/hr gell cell battery and wall charger to keep the battery at full charge. It also has a tune/operate toggle switch and a 100/200 toggle switch, that I assume is for adding capacitance . The sheet says it provides excellent results even on 160 meters. It feeds balance or single ended antennas. Price is 195.00 dollars. I just received a flyer today from Index Labs. The weight is not mentioned. 72, Byron WA8LCZ Detroit From owner-qrp-l@Lehigh.EDU Wed Nov 27 00:27:40 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id AAA02778 for ; Wed, 27 Nov 1996 00:27:39 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id AAA02778 for ; Wed, 27 Nov 1996 00:27:39 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <34898-29153>; Wed, 27 Nov 1996 00:27:07 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <34865-3298>; Wed, 27 Nov 1996 00:26:49 -0500 Received: from emout14.mail.aol.com (emout14.mx.aol.com [198.81.11.40]) by nss2.CC.Lehigh.EDU (8.8.3/8.8.3) with SMTP id AAA259518 for ; Wed, 27 Nov 1996 00:26:42 -0500 Received: by emout14.mail.aol.com (8.6.12/8.6.12) id AAA16272 for qrp-l@lehigh.edu; Wed, 27 Nov 1996 00:26:11 -0500 Message-Id: <961127002610_1917745724@emout14.mail.aol.com> Date: Wed, 27 Nov 1996 00:26:11 -0500 Reply-To: DYARNES@aol.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: DYARNES@aol.com To: "Low Power Amateur Radio Discussion" Subject: Index QRP ++ X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO I have a couple of questions--probably these have been discussed before, but I killed my computer so I have lost all my old files from QRP-L. Larry may have addressed this before, but here goes. Frequently (nearly every time) when I turn on my QRP++ I hear noise but no signals. If I turn off the rig and then turn it back on again everything comes to life. I don't remember ever having to turn it on a third time, but nearly always have to turn it on twice. Apparently the microprocessor is stuttering, but is this common? Anyone else have this problem? I haven't talked to Bruce or Tim about it yet. The other problem is something I seem to remember previous comments about. That is that there is a bad problem with blocking from adjacent signals even if they are only "moderately" stronger than the signal I am trying to copy. The adjacent signal needs to be definitely stronger to cause this, but it sure doesn't have to be a barn burner. The variable filter doesn't seem to help much, if any, in these situations. Just wonder what others have experienced. 72 de David W7AQK From owner-qrp-l@Lehigh.EDU Wed Nov 27 17:54:30 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id RAA14953 for ; Wed, 27 Nov 1996 17:54:29 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id RAA14953 for ; Wed, 27 Nov 1996 17:54:29 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <34842-14560>; Wed, 27 Nov 1996 17:54:04 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <34840-14560>; Wed, 27 Nov 1996 17:53:18 -0500 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by nss2.CC.Lehigh.EDU (8.8.3/8.8.3) with ESMTP id RAA178105 for ; Wed, 27 Nov 1996 17:53:07 -0500 Received: from pc-lve1 ([134.20.194.51]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA15654; Wed, 27 Nov 1996 15:53:42 -0700 Message-Id: <2.2.16.19961127224737.12a7b7f8@eloi> Date: Wed, 27 Nov 1996 15:47:37 -0700 Reply-To: lve1@inel.gov Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: lve1@inel.gov (Larry V East) To: "Low Power Amateur Radio Discussion" Subject: RE: QRP++ Questions Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Cc: DYARNES@aol.com X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO In a recent post, David W7AQK asked: >The other problem is something I seem to remember previous comments about. > That is that there is a bad problem with blocking from adjacent signals even >if they are only "moderately" stronger than the signal I am trying to copy. > The adjacent signal needs to be definitely stronger to cause this, but it >sure doesn't have to be a barn burner. The variable filter doesn't seem to >help much, if any, in these situations. > This problem results from the "fix" made by Index to solve the "AGC Thump" problem in the QRP++: A limiter (consisting of two diodes) is located at the output of the IF amp to keep the signal level entering the SCAF filter at a reasonable level so that the AGC has time to respond to strong signals. (The signal delay time through the SCAF was the cause of the "Thump" on strong signals; the limiter keeps signal levels from exceeding the AGC threshold by more than a few DB until the AGC has time to respond.) Anyway, the down-side is that strong signals outside the SCAF passband will activate the limiter, thus also limiting the amplitude of signals within the SCAF passband. Narrowing the SCAF only makes matters worse in a crowded band! (Kinda obviates the advantage of a narrow filter...). My solution to the "AGC Thump" problem in the QRP+ was to add a limiter AFTER the SCAF. Strong signals outside the SCAF bandpass might still overload the SCAF causing some strange "squeaks" and "howls", but at least they do not result in signals within the SCAF passband being attenuated. Unfortunately, the IF limiter in the QRP++ cannot be simply deactivated because it is also used during transmit to limit the amplitude of the RF signal feeding the driver amplifier. In fact, it is this limiter that provides the "speech processing" in SSB mode! So... what to do? I don't know, other than add an RF gain control which can be used to reduce the strength of the offending signal(s). A simple RF gain control circuit is available from Index (I have .bmp file that I can send anyone who is interested); the big problem is figuring out where to put an RF gain control pot! About the only alternatives are on the back, top of side of the rig. As for the receiver having to be turned on twice before signals come out, this sounds like a reset problem in the SCAF filter. I managed to "self-inflict" such a problem in my QRP+ when I increased the size of a bypass cap which turned out to cause the SCAF reset line to rise too slowly to affect a reset. Sounds like your rig has a similar problem; I suggest that you contact Index. 72 and have a great Turkey Day, Larry W1HUE/7 PS -- Don't forget the Fox Hunt tonight (Wednesday)! :-) From owner-qrp-l@Lehigh.EDU Thu Nov 28 09:28:43 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id JAA18092 for ; Thu, 28 Nov 1996 09:28:43 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id JAA18092 for ; Thu, 28 Nov 1996 09:28:43 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35260-20818>; Thu, 28 Nov 1996 09:28:12 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <35254-20818>; Thu, 28 Nov 1996 09:27:33 -0500 Received: from magicnet.magicnet.net (root@magicnet.magicnet.net [204.96.116.9]) by nss2.CC.Lehigh.EDU (8.8.3/8.8.3) with SMTP id JAA222928 for ; Thu, 28 Nov 1996 09:27:25 -0500 Received: from ns.magicnet.net (pm13-09.magicnet.net [206.104.204.138]) by magicnet.magicnet.net (8.6.13/8.6.12) with SMTP id JAA22839 for ; Thu, 28 Nov 1996 09:27:23 -0500 Message-Id: <3.0.32.19961128102944.006ea234@mailhost.magicnet.net> Date: Thu, 28 Nov 1996 10:29:47 -0500 Reply-To: wa8dxd@magicnet.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Tom Arvo To: "Low Power Amateur Radio Discussion" Subject: INDEX LABS QRP COMPANION Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-To: "Low Power Amateur Radio Discussion" X-Sender: wa8dxd@mailhost.magicnet.net X-Mailer: Windows Eudora Pro Version 3.0 (32) X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO Hi All: We recently received a flyer with info on this latest accessory for the QRP+ from Index Labs. The photo/info is posted on our web site: http://www.qrpworld.com/qrpcomp.htm There is also an RFGain mod provided by Index Labs posted. 73 & HAPPY THANKSGIVING! Tom WA8DXD From owner-qrp-l@Lehigh.EDU Thu Nov 28 11:59:22 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA21290 for ; Thu, 28 Nov 1996 11:59:21 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA21290 for ; Thu, 28 Nov 1996 11:59:21 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35094-17233>; Thu, 28 Nov 1996 11:58:58 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <34839-17233>; Thu, 28 Nov 1996 11:57:59 -0500 Received: from x4.boston.juno.com (x4.boston.juno.com [205.231.101.22]) by nss2.CC.Lehigh.EDU (8.8.3/8.8.3) with ESMTP id LAA109456 for ; Thu, 28 Nov 1996 11:57:45 -0500 Received: (from n4so@juno.com) by x4.boston.juno.com (queuemail) id LAC15800; Thu, 28 Nov 1996 11:56:50 EST Message-Id: <19961128.104739.7375.9.n4so@juno.com> Date: Thu, 28 Nov 1996 11:56:50 EST Reply-To: n4so@juno.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: n4so@juno.com (CHARLES K BROWN) To: "Low Power Amateur Radio Discussion" Subject: QRP COMPANION X-Mailer: Juno 1.15 X-Juno-Line-Breaks: 0-21,23-51 X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO Subject: Re: INDEX LABS QRP COMPANION This is a copy of a WWW file from Tom WA8DXD QRP COMPANION The most used accessories for the QRP PLUS Transceiver packaged in a matching cabinet! =B7 Antenna Tuner =B7 Noise Bridge =B7 Gel Cell Battery =B7 Charger Antenna Tuner: Wide matching rang( provides excellent results even on 160M. Simple, unambiguous adjustment with two controls. Feeds balanced and single ended antennas. Noise Bridge: Accurately set the tuner on receive. No need for on-air tune up. 4 1/2 AMP Hour Gel Cell Battery: Self contained battery provides a weekend of operation on a single charge.= Charger: A wall type supply maintains the battery at full charge. Designed and Built in the U.S.A. Price: $195.00 - VISA/MASTERCARD Accepted INDEX LABORATORIES 9318 Randall Dr. NW, Gig Harbor, WA 98332 Tel: 206.851.5725 / Fax: 206.851.8385 ----------------------------------------------- 73 & Happy Turkey Day, Tom WA8DXD %%%%%%%%%%%%%%%%%%%%%%% Ken Brown, N4SO QTH Near Mobile, AL QRP-L #622 n4so@juno.com From owner-qrp-l@Lehigh.EDU Fri Nov 29 16:53:39 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id QAA07294 for ; Fri, 29 Nov 1996 16:53:38 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id QAA07294 for ; Fri, 29 Nov 1996 16:53:38 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <34913-24102>; Fri, 29 Nov 1996 16:53:21 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <34890-24102>; Fri, 29 Nov 1996 16:52:40 -0500 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by nss2.CC.Lehigh.EDU (8.8.3/8.8.3) with ESMTP id QAA167721 for ; Fri, 29 Nov 1996 16:52:29 -0500 Received: from pc-lve1 ([134.20.194.51]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAD1388 for ; Fri, 29 Nov 1996 14:53:03 -0700 Message-Id: <2.2.16.19961129095123.28578f7a@eloi> Date: Fri, 29 Nov 1996 02:51:23 -0700 Reply-To: lve1@inel.gov Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: lve1@inel.gov (Larry V East) To: "Low Power Amateur Radio Discussion" Subject: The latest from INDEX... Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO >QRP COMPANION > >The most used accessories for the QRP PLUS Transceiver >packaged in a matching cabinet! > >=B7 Antenna Tuner >=B7 Noise Bridge >=B7 Gel Cell Battery >=B7 Charger > ...snip snip... > >Price: $195.00 - VISA/MASTERCARD Accepted > Hmmm... Lets see now: - MFJ Random Wire Tuner: $49.95 - Noise bridge: $39.95 - 6AH GelCell from WalMart: $24.95 - Wall Charger from RS: $12.95 Total comes to $127.80. Hmmm... for only $67.20 more, I can get all this in one little box. Just thinking out loud... :-) :-) From owner-qrp-l@Lehigh.EDU Mon Dec 2 12:19:39 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id MAA09652 for ; Mon, 2 Dec 1996 12:19:38 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id MAA09652 for ; Mon, 2 Dec 1996 12:19:38 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35075-17404>; Mon, 2 Dec 1996 12:10:34 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <35048-23033>; Mon, 2 Dec 1996 12:03:45 -0500 Received: from upsmot03.msn.com (upsmot03.msn.com [204.95.110.85]) by nss2.CC.Lehigh.EDU (8.8.3/8.8.3) with SMTP id MAA215102 for ; Mon, 2 Dec 1996 12:03:17 -0500 Received: from upmajb02.msn.com (upmajb02.msn.com [204.95.110.74]) by upsmot03.msn.com (8.6.8.1/Configuration 4) with SMTP id JAA00879 for ; Mon, 2 Dec 1996 09:01:51 -0800 Message-Id: Date: Mon, 2 Dec 96 16:53:15 UT Reply-To: ki6pr@msn.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "Mike Siegel" To: "Low Power Amateur Radio Discussion" Subject: QRP Companion X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO Gee, I wish Bruce had come out with Index's QRP Companion, TWO YEARS AGO, when I wanted it (and when he was promoting it). Since that time, I have come up with several small antenna tuners and batter/charger systems, for my home and field operations. So now, at $200, the Index rig becomes a very low priority on my shopping list...may be after I get the rest of my gear squared away...? 72/3, Mike KI6PR El Rancho R.F., CA From lve1@inel.gov Wed Dec 11 15:44:48 1996 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id PAA07332 for ; Wed, 11 Dec 1996 15:44:44 -0500 (EST) X-Received-x: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id PAA07332 for ; Wed, 11 Dec 1996 15:44:44 -0500 (EST) Received: from pc-lve1 ([134.20.194.51]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA28505; Wed, 11 Dec 1996 13:44:47 -0700 Message-Id: <2.2.16.19961211204202.331f987a@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Priority: 2 (High) Date: Wed, 11 Dec 1996 13:42:02 -0700 To: pepperb@gov.on.ca, Charlie Lofgren , bkassel@enet.net (Brian Kassel), Paul Erickson , Mike Rioux , John Dundas , af852@rgfn.epcc.Edu (William R Colbert), Bob_Tellefsen-CNSE97@email.mot.com, Christoph Zehntner , GREGOIRE@ENDOR.COM (ERNEST GREGOIRE), jdorson@bbs.mpcs.com (John Dorson), "GaryNye" , Bill Acito , "Mark B. Peterson" <70233.1106@CompuServe.COM>, bfollett@ditell.com, bcutter@teal.csn.net (Bob Cutter), john@antenna.demon.co.uk, "Francis A. McCrackin" , "Richard Hieber" , "JOHN F. McCLUN" , MCDANIELD@ouvaxa.cats.ohiou.edu, Norbert.Heyder@erno.de, N5EM@aol.com, larsennc@alaska.net (Nancy-KL7NY/Jim-AL7FS/Juliann-WL7MP), "Jerry L. Bartachek" , "Alvin G. Gann" , Peter Zenker <100743.3320@CompuServe.COM>, Wolfgang Schwarz <101511.61@CompuServe.COM>, Jerry KD0CA , jim_kc1fb@usa.pipeline.com (Jim Francoeur KC1FB), DYARNES@aol.com, tavan@tibco.com, "Bob Barry" , dgf@netcom.com (David Feldman), john andrews , Joel Malman , Dean Marzocca , rwright@soml.com (Robert Wright), Anders Wandahl , , rcmcc@cc.bellcore.com (ronald c mcconnell), , Scott Cranston , William McFadden , "Taylor Greg" , Art Winterbauer , , cookes@pop.jaring.my (Siong Teck Cheun @ Joseph), BERGESON@PPCC.CCCOES.EDU, George Gingell , "Doyle, Ron" , "Gert, SM5LWC" , , John Lockhart , Wayne Glover From: lve1@inel.gov (Larry V East) Subject: QRP+/QRP++ SSB Questions Status: RO I need some help from you QRP+/QRP++ owners out there in cyberspace: 1. Have you measured the total current drain when transmitting in SSB mode with no output (mic gain all the way down)? If so, what value did you get? 2. Have you attempted to adjust the gate bias on the IRF510 final? What were your results> 3. Have you ever looked at the RF output on a 'scope while feeding a two-tone signal into the mic input? If so, what maximum peak power could you get before the output waveshape began to flatten? (On what bands did you look at the SSB output? Did you disable the ALC?) Any input from the field would be much appreciated. Please indicate whether the measurements were made on an Original QRP+, Upgraded QRP+ or New Improved QRP+ (production version). Thanks in advance. I have tried to squeeze some info out of INDEX, but no response as of yet. Bruce Franklin ("Mr. INDEX Labs") was very quick to respond with some comments (all helpful and none negative, I might point out) when I sent him a draft of a QRP+ receiver mods article that will appear in the January QRP Quarterly, but otherwise he seems to ignore letters and not return phone calls. _________________________________________________________ "Any opinions expressed herein are my own and probably do not agree with those of my employer, the U.S. Government or my spouse" --... ...-- Larry V. East (W1HUE) Idaho Falls, ID e-mail: LVE1@inel.gov work: (208) 526-0081 home: (208) 529-2162 From owner-qrp-l@Lehigh.EDU Fri Dec 13 12:17:26 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id MAA20528 for ; Fri, 13 Dec 1996 12:17:26 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id MAA20528 for ; Fri, 13 Dec 1996 12:17:26 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35567-16246>; Fri, 13 Dec 1996 12:15:55 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <35534-37240>; Fri, 13 Dec 1996 12:13:55 -0500 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by nss2.CC.Lehigh.EDU (8.8.4/8.8.4) with ESMTP id MAA219848 for ; Fri, 13 Dec 1996 12:13:33 -0500 Received: from pc-lve1 ([134.20.194.51]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA6642 for ; Fri, 13 Dec 1996 10:13:47 -0700 Message-Id: <2.2.16.19961213171049.37d732f4@eloi> Date: Fri, 13 Dec 1996 10:10:49 -0700 Reply-To: lve1@inel.gov Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: lve1@inel.gov (Larry V East) To: "Low Power Amateur Radio Discussion" Subject: QRP+/QRP++ SSB Questions Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) X-Priority: 2 (High) X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO I need some help from you QRP+/QRP++ owners out there in cyberspace: 1. Have you measured the total current drain when transmitting in SSB mode with no output (mic gain all the way down)? If so, what value did you get? 2. Have you attempted to adjust the gate bias on the IRF510 final? What were your results> 3. Have you ever looked at the RF output on a 'scope while feeding a two-tone signal into the mic input? If so, what maximum peak power could you get before the output waveshape began to flatten? (On what bands did you look at the SSB output? Did you disable the ALC?) Any input from the field would be much appreciated so that I can compare your results with mine. Please indicate whether the measurements were made on an Original QRP+, Upgraded QRP+ or New Improved QRP+ (production version). Thanks in advance. Please email direct. 72, Larry W1HUE/7 _________________________________________________________ "Any opinions expressed herein are my own and probably do not agree with those of my employer, the U.S. Government or my spouse" --... ...-- Larry V. East (W1HUE) Idaho Falls, ID e-mail: LVE1@inel.gov work: (208) 526-0081 home: (208) 529-2162 From owner-qrp-l@Lehigh.EDU Sat Dec 14 16:12:38 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id QAA14279 for ; Sat, 14 Dec 1996 16:12:37 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id QAA14279 for ; Sat, 14 Dec 1996 16:12:37 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <34963-30596>; Sat, 14 Dec 1996 16:12:03 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <34870-40070>; Sat, 14 Dec 1996 16:11:10 -0500 Received: from admin.cyberenet.net (root@admin.cyberenet.net [204.213.252.6]) by nss2.CC.Lehigh.EDU (8.8.4/8.8.4) with SMTP id QAA240293 for ; Sat, 14 Dec 1996 16:11:03 -0500 Received: from ux1.cyberenet.net by admin.cyberenet.net with smtp (Smail3.1.29.1 #7) id m0vZ1L3-000NzRC; Sat, 14 Dec 96 16:09 EST Received: from [206.106.174.44] by ux1.cyberenet.net with smtp (Smail3.1.29.1 #8) id m0vZ1aP-0006FGC; Sat, 14 Dec 96 16:25 EST Message-Id: Date: Sat, 14 Dec 1996 15:04:40 -0500 Reply-To: jsielke@pobox.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: NJBIRDMAN To: "Low Power Amateur Radio Discussion" Subject: QRP Plus Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Sender: jsielke@mail.cyberenet.net X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO Anyone have any first-hand experience on the "QRP Plus" transciever from Index Inc? I have seen the ads in QST, and it looks very impressive, although expensive. Just curious for now. _ _ _ _ _ ___ | \| || | | _ | |/ __| | .` ||_ _|| || |\__ \ |_|\_| |_| \__/ |___/ John L. Sielke jsielke@pobox.com n4js@n4js.ampr.org QRP-L #884 NJ Grid:FM29 http://www.pobox.com/~jsielke From jsielke@pobox.com Sat Dec 14 16:45:06 1996 Received: from admin.cyberenet.net (root@admin.cyberenet.net [204.213.252.6]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with SMTP id QAA15307 for ; Sat, 14 Dec 1996 16:45:06 -0500 (EST) X-Received-x: from admin.cyberenet.net (root@admin.cyberenet.net [204.213.252.6]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with SMTP id QAA15307 for ; Sat, 14 Dec 1996 16:45:06 -0500 (EST) Received: from ux1.cyberenet.net by admin.cyberenet.net with smtp (Smail3.1.29.1 #7) id m0vZ1rz-000O0VC; Sat, 14 Dec 96 16:43 EST Received: from [206.106.174.44] by ux1.cyberenet.net with smtp (Smail3.1.29.1 #8) id m0vZ27W-0006FGC; Sat, 14 Dec 96 16:59 EST X-Sender: jsielke@mail.cyberenet.net Message-Id: In-Reply-To: <199612142129.QAA14817@oucsace.cs.ohiou.edu> References: from "NJBIRDMAN" at Dec 14, 96 03:04:40 pm Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Sat, 14 Dec 1996 16:44:57 -0500 To: William McFadden From: NJBIRDMAN Subject: Re: QRP Plus Status: RO > >My web page contains a pretty comprehensive archive of the discussions >from QRP-L about the QRP+ and the QRP++. Please feel free to visit to >read these articles. > >My web page address is in the signature, below. Follow the link to >"Amateur Radio", then to "Archives and Articles". > I went to your web page. So much info I downloaded the archives to read offline! Thanks very much! I notice INDEX does not have an ad in December QST, so may be a moot point... _ _ _ _ _ ___ | \| || | | _ | |/ __| | .` ||_ _|| || |\__ \ |_|\_| |_| \__/ |___/ John L. Sielke jsielke@pobox.com n4js@n4js.ampr.org QRP-L #884 NJ Grid:FM29 http://www.pobox.com/~jsielke From owner-qrp-l@Lehigh.EDU Sat Dec 14 18:54:32 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id SAA18319 for ; Sat, 14 Dec 1996 18:54:31 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id SAA18319 for ; Sat, 14 Dec 1996 18:54:31 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35080-30596>; Sat, 14 Dec 1996 18:54:16 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <34848-16263>; Sat, 14 Dec 1996 18:53:32 -0500 Received: from admin.cyberenet.net (root@admin.cyberenet.net [204.213.252.6]) by nss2.CC.Lehigh.EDU (8.8.4/8.8.4) with SMTP id SAA214748 for ; Sat, 14 Dec 1996 18:53:19 -0500 Received: from ux1.cyberenet.net by admin.cyberenet.net with smtp (Smail3.1.29.1 #7) id m0vZ3s5-000NzaC; Sat, 14 Dec 96 18:51 EST Received: from [206.106.174.44] by ux1.cyberenet.net with smtp (Smail3.1.29.1 #8) id m0vZ48H-0006FKC; Sat, 14 Dec 96 19:08 EST Message-Id: Date: Sat, 14 Dec 1996 18:53:08 -0500 Reply-To: jsielke@pobox.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: NJBIRDMAN To: "Low Power Amateur Radio Discussion" Subject: Thanks (Re; QRP+) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Sender: jsielke@mail.cyberenet.net X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO I got a LOT of responses to my query about the INDEX LABS QRP+. Thanks to all those that responded. I dowloaded all the QRP-L archives on the rig. At least for a change, I'll be an informed shopper ;-) Let you know when/if If get it. John Lehigh Class of '66 _ _ _ _ _ ___ | \| || | | _ | |/ __| | .` ||_ _|| || |\__ \ |_|\_| |_| \__/ |___/ John L. Sielke jsielke@pobox.com n4js@n4js.ampr.org QRP-L #884 NJ Grid:FM29 http://www.pobox.com/~jsielke From lve1@inel.gov Mon Dec 16 12:27:24 1996 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id MAA07210 for ; Mon, 16 Dec 1996 12:27:21 -0500 (EST) X-Received-x: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id MAA07210 for ; Mon, 16 Dec 1996 12:27:21 -0500 (EST) Received: from pc-lve1 ([134.20.194.51]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA26089; Mon, 16 Dec 1996 10:27:10 -0700 Message-Id: <2.2.16.19961216172605.18bfcd1e@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Mon, 16 Dec 1996 10:26:05 -0700 To: pepperb@gov.on.ca, Charlie Lofgren , bkassel@enet.net (Brian Kassel), Paul Erickson , Mike Rioux , John Dundas , af852@rgfn.epcc.Edu (William R Colbert), Bob_Tellefsen-CNSE97@email.mot.com, Christoph Zehntner , GREGOIRE@ENDOR.COM (ERNEST GREGOIRE), jdorson@bbs.mpcs.com (John Dorson), "GaryNye" , Bill Acito , "Mark B. Peterson" <70233.1106@CompuServe.COM>, bfollett@ditell.com, bcutter@teal.csn.net (Bob Cutter), john@antenna.demon.co.uk, "Francis A. McCrackin" , "Richard Hieber" , "JOHN F. McCLUN" , MCDANIELD@ouvaxa.cats.ohiou.edu, Norbert.Heyder@erno.de, N5EM@aol.com, larsennc@alaska.net (Nancy-KL7NY/Jim-AL7FS/Juliann-WL7MP), "Jerry L. Bartachek" , "Alvin G. Gann" , Peter Zenker <100743.3320@CompuServe.COM>, Wolfgang Schwarz <101511.61@CompuServe.COM>, Jerry KD0CA , jim_kc1fb@usa.pipeline.com (Jim Francoeur KC1FB), DYARNES@aol.com, tavan@tibco.com, "Bob Barry" , dgf@netcom.com (David Feldman), john andrews , Joel Malman , Dean Marzocca , rwright@soml.com (Robert Wright), Anders Wandahl , , rcmcc@cc.bellcore.com (ronald c mcconnell), , Scott Cranston , William McFadden , "Taylor Greg" , Art Winterbauer , , cookes@pop.jaring.my (Siong Teck Cheun @ Joseph), BERGESON@PPCC.CCCOES.EDU, George Gingell , "Doyle, Ron" , "Gert, SM5LWC" , , John Lockhart , Wayne Glover From: lve1@inel.gov (Larry V East) Subject: QRP+ SSB -- Followup Status: RO I had a couple of responses from folks that said that they had adjusted the IRF510 final bias as per the instructions in the manual: set it so that the current with no (or very little) transmitted output is 60mA higher than the minimum setting. However, they have not looked at the SSB output on a 'scope. Here's the problem: I adjusted the bias on my rig as per the manual instructions (it has the direction of the pot for minimum current backwards, by the way...). I tried to make a couple of contacts on 15M SSB but was told that my audio was severely distorted. I made a check with a local on 75M, and he told me that he didn't think the audio "sounded right" and that my signal seemed pretty broad. I then decided to look at the transmitted signal on my 'scope. The SSB modulation looked horrible! I then fed a two-tone audio signal into the mic input, looked again, and it still looked horrible! Severe negative-going clipping resulting in zero RF output for at least 30% of the time. No wonder there was severe audio distortion and splatter! I then adjusted the bias until I got a decent looking two-tone output on the 'scope -- this required that the idle current be increased to at least 500mA above the minimum setting. Maybe the manual has a misprint, and it should have said 600mA?? I also noted that the positive going peaks were clipped (or limited) at peak power outputs greater than about 3W on the low bands (160-40M) and at less power on the higher bands (about 1.5W on 10M); this could not be eliminated by adjusting the bias. Clipping is pretty severe at 5W output with the two-tone signal. I could also see the clipping on the 'scope when speaking into the mike. By the way -- I have added a pot which allows me to control the ALC level and thus control the SSB power output. Turns out that before I decided to adjust the bias, the no-signal transmitter current was about 850mA. Minimum current is 435mA, so it was running about 415mA above minimum. (That's the way it was set at the factory.) I primarily operate CW, but I had made a few SSB contacts (before deciding to adjust the bias) with no complaints about the audio quality -- although I was only getting about 3W peak output. This past week I borrowed a spectrum analyzer and looked at the SSB output. Adjusting the final bias for minimum "hash" on the spectrum analyzer yielded an idling current of 550mA above the minimum -- again about 10X higher than indicated in the manual. However, the clipping that takes place above 3W peak output did not seem to be causing much in the way of spurious output as far as I could tell from the spectrum analyzer. Saturday afternoon I made two SSB contacts on 17M with the rig. Final bias was set to give an idling current of about 980mA with a supply voltage of 13.1V (normally 13.4V but I get 0.3V drop across the meter). The ALC was set to give a peak output of about 4W -- enough to make the audio peak limiting evident on the scope. Both contacts told me that the audio sounded good; one even said it was "excellent". I also made a check with a local station on 75M, and he also said it sounded good. I would sure like for someone out there to verify my findings. It does not take a fancy spectrum analyzer, just a 'scope that can display the carrier modulation. A simple "monitor scope" should work fine. And if you don't have a two-tone audio generator, just look at the output while talking into the mic. Check the idling current before you start. Then set the bias to the "60mA above minimum" as per the manual and tell me what you see... Thanks and 72, Larry W1HUE/7 PS -- 10M was sure stinko in Idaho for the contest this weekend! From owner-qrp-l@Lehigh.EDU Fri Jan 3 22:52:10 1997 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id WAA28611 for ; Fri, 3 Jan 1997 22:52:09 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id WAA28611 for ; Fri, 3 Jan 1997 22:52:09 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35045-37453>; Fri, 3 Jan 1997 22:48:48 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <34903-46926>; Fri, 3 Jan 1997 22:47:23 -0500 Received: from islander.whidbey.net (root@islander.whidbey.net [204.57.140.1]) by nss2.CC.Lehigh.EDU (8.8.4/8.8.4) with ESMTP id WAA185110 for ; Fri, 3 Jan 1997 22:47:20 -0500 Received: from psikes.whidbey.net (asn123.whidbey.net [204.57.140.12]) by islander.whidbey.net (8.7.6/8.7.3) with SMTP id TAA13614 for ; Fri, 3 Jan 1997 19:45:36 -0800 (PST) Message-Id: <199701040345.TAA13614@islander.whidbey.net> Date: Fri, 3 Jan 1997 19:47:31 -8 Reply-To: psikes@whidbey.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "Phil Sikes" To: "Low Power Amateur Radio Discussion" Subject: QRP+ Questions X-mailer: Pegasus Mail for Win32 (v2.42a) X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO Hello to the group and Happy New Year! With the salutations out of the way I have a couple of questions concerning the QRP+. I have the original version and everytime I turn it on the filter default is for SSB operation. Is this normal? I have tried saving a frequency to memory with the scaf set to CW mode, but it still comes back on in SSB mode. Any ideas? Second question concerns the HM70 handmike that was suggested for use with the rig. Does it need to be re-wired for the QRP+, or can I just plug it in and go when it gets here? I do love the little rig, made a SSB contact to my brother AB5UA down in Oklahoma land from up here in Washington (the wet state) on 15 meters the other day. Ain't life and QRP just a hoot!! 72 - Phil Phil Sikes - KJ7NS ARCI #9196 - QRP-L #528 FISTS #2602 - NW QRP #412 From owner-qrp-l@Lehigh.EDU Sat Jan 4 02:29:41 1997 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id CAA03564 for ; Sat, 4 Jan 1997 02:29:40 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id CAA03564 for ; Sat, 4 Jan 1997 02:29:40 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35127-29711>; Sat, 4 Jan 1997 02:26:30 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <34894-29711>; Sat, 4 Jan 1997 02:25:49 -0500 Received: from mailhost1.primenet.com (mailhost1.primenet.com [206.165.5.51]) by nss2.CC.Lehigh.EDU (8.8.4/8.8.4) with ESMTP id CAA225368 for ; Sat, 4 Jan 1997 02:25:41 -0500 Received: from primenet.com (vole@usr07.primenet.com [206.165.5.107]) by mailhost1.primenet.com (8.8.3/wjp-h3.00) with ESMTP id AAA03867; Sat, 4 Jan 1997 00:25:40 -0700 (MST) Received: (from vole@localhost)