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141. [AMPS] TS940S CONNECTION TO HEATHKIT SB200 LINEAR (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Wed, 20 Oct 1999 14:36:26 -0400; This is part of the story. Actually, the TS-930 can switch that line with either a transistor or a relay, depending on a jumper setting inside the radio. However, the transistor switch in the 930 is; /archives//html/Amps/1999-10/msg00570.html (9,155 bytes)
142. [AMPS] Contest Station Database -- contents lookup added (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Thu, 21 Oct 1999 12:53:04 -0400; I have added a new query to the search page. If you know the numeral in the call-sign of a station, but are unsure of the full call, you can browse a list of all the calls in the database with that n; /archives//html/Amps/1999-10/msg00579.html (7,429 bytes)
143. [AMPS] US/VE HF Contesters' Favorite Rigs (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Mon, 25 Oct 1999 12:45:58 -0400; The contest station database now has 843 US/VE stations in it, of which 226 records are new or newly updated. I thought there might be general interest in knowing what this group of HF contesters cho; /archives//html/Amps/1999-10/msg00625.html (8,066 bytes)
144. [AMPS] Where to read Reflected Power (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Tue, 28 Sep 1999 16:02:21 -0400; And here's where I part company with you, Jon. An antenna with a 750-ohm feedpoint impedance, fed with open wire line through a tuner and balun, could be a very *good* antenna, indeed. The real issue; /archives//html/Amps/1999-09/msg00295.html (9,693 bytes)
145. [AMPS] L-Pi net...downside? (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Mon, 02 Aug 1999 10:57:08 +0100; Check out Allen Bond's president's page at www.mgs4u.com. He has lots of different vacuum relays. 73, Pete Smith N4ZR n4zr@contesting.com Sometimes a tower is just a tower -- FAQ on WWW: http://www.c; /archives//html/Amps/1999-08/msg00021.html (8,252 bytes)
146. [AMPS] SB-220 input circuit (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Mon, 02 Aug 1999 12:37:15 -0400; badly designed for 10 meters, and that results in lower output. Mine has a relatively high input SWR (ca. 1.8:1 on the part of 10 meters I'm interested in) and suffers from low 10m. output (ca. 800; /archives//html/Amps/1999-08/msg00031.html (8,254 bytes)
147. [AMPS] SB-220 input circuit (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Tue, 03 Aug 1999 01:36:40 +0100; No, not at all. What I *do* see is below-normal grid and plate current compared to the lower bands, and commensurately less output. It's been opined that the problem is not the match to the transceiv; /archives//html/Amps/1999-08/msg00051.html (9,332 bytes)
148. [AMPS] SB-220 relay failure analysis (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Sun, 22 Aug 1999 22:00:38 +0100; During the last CW WPX contest, the antenna changeover relay of my SB-220, which had been occasionally sticky for a couple of years, finally got to the point where it was sticking in the standby cond; /archives//html/Amps/1999-08/msg00293.html (7,603 bytes)
149. [AMPS] SB-220 correction (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Sun, 22 Aug 1999 22:03:37 +0100; Sorry - it was the normally-open bias contacts that had the problem, so maybe it's explicable in terms of the tubes' idle current trying to flow before the contacts are fully closed -- makes more sen; /archives//html/Amps/1999-08/msg00294.html (6,749 bytes)
150. [AMPS] Upside down SB-220 (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Thu, 26 Aug 1999 11:16:09 +0100; Is there anything wrong with operating an SB-220 upside down while (I hope briefly) trouble-shooting a problem under the chassis? I would not be drawing more than idling cathode current, but am conce; /archives//html/Amps/1999-08/msg00312.html (7,027 bytes)
151. [AMPS] Bias for SB-220 (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Tue, 01 Jun 1999 11:27:29 -0400; OK, I'm confused. I'm building an electronic bias switch and vacuum relay QSK into my SB-220, having finally been jarred out of procrastination by the failure of the changeover relay this past weeken; /archives//html/Amps/1999-06/msg00007.html (8,578 bytes)
152. [AMPS] Amp keying (was Bias for SB-220) (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Wed, 02 Jun 1999 14:10:34 -0400; More than enough. Scott, K9MA, has designed a vacuum relay QSK system that takes advantage of the fact that the TS-930 turns on a +12VDC line 2ms before RF output. With appropriate current-limited po; /archives//html/Amps/1999-06/msg00055.html (10,350 bytes)
153. [AMPS] slam tally (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Mon, 07 Jun 1999 16:20:12 -0400; At the same time, I share his discomfort. We should be able to benefit by the technical debate, even with the same intense disagreements, without the personal attacks. In the last round, perhaps six; /archives//html/Amps/1999-06/msg00215.html (9,431 bytes)
154. [AMPS] slam tally (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Wed, 09 Jun 1999 14:10:00 -0400; Moreover, even if the above weren't true, there may be a perfectly innocent explanation of the "discrepancy." Most companies of any size have separate salary "grades", that are distinct from function; /archives//html/Amps/1999-06/msg00305.html (10,151 bytes)
155. [AMPS] Looking for 8877? (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Tue, 22 Jun 1999 16:18:01 -0400; Cehck out eBay Eimac transmitting tube 3CX1500A7 (8877) (Item #121285168). Current bid is very low but it probably won't stay there. Stated to be new tube in box. 73, Pete N4ZR Sometimes a tower is j; /archives//html/Amps/1999-06/msg00575.html (6,784 bytes)
156. [AMPS] Re: Amp photos (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Thu, 24 Jun 1999 08:51:33 -0400; While you're at it, a quick swing through the archive will probably uncover a lot more pix already posted. One particularly impressive amp I remember was built by a ZL for dxpedition service, and had; /archives//html/Amps/1999-06/msg00638.html (8,960 bytes)
157. [AMPS] RJ1A relays (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Mon, 28 Jun 1999 09:39:12 -0400; $8 is too cheap. Allen Bond of Max-Gain Systems sells RJ-1As and the equivalent Kilovac HC-1 for $32.50. He says these are new, removed from equipment, hi-potted and fully guaranteed (Fair's have a 1; /archives//html/Amps/1999-06/msg00735.html (8,123 bytes)
158. [AMPS] KM1H wheres Carl (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Mon, 28 Jun 1999 12:18:17 -0400; According to juno.com, his e-mail box is over-full. I hope that the explanation isn't something more serious than reflector membership... 73, Pete N4ZR Sometimes a tower is just a tower -- FAQ on WW; /archives//html/Amps/1999-06/msg00748.html (8,584 bytes)
159. [AMPS] Purchase Recommendation? (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Mon, 03 May 1999 12:23:44 +0100; Amen ... my SB-220 has been unconditionally stable. However, these were built as kits, and there could be a certain amount of variation in layout under the chassis that could affect VHF stability. I; /archives//html/Amps/1999-05/msg00016.html (10,100 bytes)
160. [AMPS] Amp Tuning (was 3-500Z Grid Current Rating) (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Tue, 04 May 1999 15:38:58 -0400; IMO, this is definitely the way to do it. The only caution I would add is that grid current can soar pretty high when running full drive with loading that is still short of optimum. That tends to arg; /archives//html/Amps/1999-05/msg00045.html (9,658 bytes)

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