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1. [Amps] Alpha 87A reliability problem (score: 1): Author: dick.green@valley.net (Dick Green); Date: Thu, 2 Jan 2003 15:27:44 -0500; Great info, John. I had to replace a pair of PIN diodes in my 7 year old 87A once, and now I'm almost certain the cause was too much RF from the second radio/amp in my SO2R contest station. Although; /archives//html/Amps/2003-01/msg00013.html (14,272 bytes)
2. [Amps] Acom 2000A + Alpha (score: 1): Author: dick.green@valley.net (Dick Green); Date: Fri, 6 Dec 2002 14:30:19 -0500; John, Sorry I didn't respond to your earlier request. The equivalent amp from Alpha is the 87A. I have a 2000A and an 87A, using them for SO2R (single-op, two radio) contesting. Here are some thought; /archives//html/Amps/2002-12/msg00119.html (14,880 bytes)
3. [Amps] FW: 3CX800 and 2000A vs 87A (score: 1): Author: dick.green@valley.net (Dick Green); Date: Thu, 19 Dec 2002 17:40:50 -0500; This post from the YCCC reflector might be of interest to you AMP types. The first message is about the 3CX800. Could this, rather than parasitic oscillations, be the real cause of thumps and bangs i; /archives//html/Amps/2002-12/msg00225.html (33,474 bytes)
4. [AMPS] RE: RF Amplifier Discussion Digest V4 #283 (score: 1): Author: dick.green@valley.net (Dick Green); Date: Mon, 3 Sep 2001 03:25:07 -0400; Jim, If the resistor is a cement wirewound unit mounted on a board underneath the QSK board (at the left rear of the chassis), and the board also has a large black plastic box, then it's part of the; /archives//html/Amps/2001-09/msg00023.html (9,081 bytes)
5. [AMPS] Re: AMPS] Looking for spares for AMP Supply LK500 NTC (score: 1): Author: dick.green@valley.net (Dick Green); Date: Sat, 25 Aug 2001 14:55:03 -0400; Tony, Omega Electronics stocks replacement parts for the Amp Supply line. Check out the website at http://www.omega-electronics.com/, or call Billy Edwards at 1-919- 266-7373. Billy was service mana; /archives//html/Amps/2001-08/msg00323.html (7,602 bytes)
6. [AMPS] ACOM Amps (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Sun, 1 Jul 2001 12:32:25 -0400; Tom, I'm sure ACOM is alive and well. Last I heard, they had shifted a lot of their production to the new "1000" line of manual tune amps and are selling a lot of them. As I understand it, they under; /archives//html/Amps/2001-07/msg00004.html (7,757 bytes)
7. [AMPS] ACOM Amps (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Mon, 2 Jul 2001 09:49:49 -0400; Rich, I don't think so. My ACOM 2000A has been quite solid in the autotune department. I had a couple of problems initially -- a bad Kilovac vaccum relay (gone when I replaced it with a Jennings) and; /archives//html/Amps/2001-07/msg00021.html (10,625 bytes)
8. [AMPS] ACOM Amps (score: 1): Author: dick.green@valley.net (Dick Green); Date: Sat, 7 Jul 2001 00:08:05 -0400; Rich, Sorry I didn't get to replying sooner. /\ ¿Does the vacuum relay operate from a speedup circuit using a coil PS of 3 - 5 x the rated coil V, current limited by a series-R.? I think (stri; /archives//html/Amps/2001-07/msg00096.html (14,066 bytes)
9. [AMPS] Alpha 86 pin diode upgrade (score: 1): Author: dick.green@valley.net (Dick Green); Date: Wed, 2 May 2001 16:03:54 -0400; Marty, Better in what way? The 87A uses the KS1001, and I'll bet the 89 does, too. I know there were problems with the pin diodes in the 86 line. I have a friend with one who said it generates horre; /archives//html/Amps/2001-05/msg00034.html (8,055 bytes)
10. [AMPS] Regulac schematics or manual (score: 1): Author: dick.green@valley.net (Dick Green); Date: Sun, 6 May 2001 16:07:34 -0400; Hi folks, I was fortunate enough to pick up a Regulac variable transformer for a great price at a hamfest this weekend. Does anyone have a schematic and/or manual for this unit? A little more detail:; /archives//html/Amps/2001-05/msg00076.html (7,647 bytes)
11. [AMPS] RE: RF Amplifier Discussion Digest V4 #88 (score: 1): Author: dick.green@valley.net (Dick Green); Date: Tue, 20 Mar 2001 00:32:07 -0500; Eddy, I wasn't sure whether you were counting the LEDs from the left or right (the correct way is to count from the right, as in binary arithmetic.) If you are counting from the right, the LEDs would; /archives//html/Amps/2001-03/msg00174.html (8,866 bytes)
12. [AMPS] ALPHA 86: Comments Please! (score: 1): Author: dick.green@valley.net (Dick Green); Date: Fri, 19 Jan 2001 01:17:48 -0500; Some caution is advisable. My understanding is that there were PIN diode problems in the 86 and that the factory fix is very expensive ($1500?) A friend bought an 86 not too long ago, only to discove; /archives//html/Amps/2001-01/msg00487.html (7,676 bytes)
13. [AMPS] More on LK550 cooling (score: 1): Author: dick.green@valley.net (Dick Green); Date: Mon, 23 Oct 2000 01:51:56 -0400; Some of you may remember my post of a few weeks ago asking how to reduce the fan noise in an Amp International (nee Amp Supply) LK550-ZC. I only got two or three responses, but those I got raised que; /archives//html/Amps/2000-10/msg00510.html (12,650 bytes)
14. [AMPS] 87A Faults #1 and #18 (score: 1): Author: dick.green@valley.net (Dick Green); Date: Thu, 26 Oct 2000 01:19:52 -0400; Ah well, Murphy strikes on the eve before the big CQWW SSB contest... Today, while chasing K5K on 15M RTTY, my 87A tripped with soft fault #1 ("Receive PIN back bias voltage not at minimum required l; /archives//html/Amps/2000-10/msg00552.html (8,837 bytes)
15. [AMPS] followup on 87A faults (score: 1): Author: dick.green@valley.net (Dick Green); Date: Mon, 30 Oct 2000 03:21:24 -0500; Never got any answers from this reflector (too few 87A owners, or is everyone too busy arguing about theoretical minutia?) Anyway, it turned out that the soft fault#1 (receive PIN diode bias too low); /archives//html/Amps/2000-10/msg00673.html (7,452 bytes)
16. [AMPS] Follow-up on LK550 fan noise (score: 1): Author: dick.green@valley.net (Dick Green); Date: Thu, 21 Sep 2000 15:29:18 -0400; I only got a couple of responses to my query about reducing the high-speed fan noise on an LK550-ZC. Both indicated that the cooling in Amp Supply amps may be inadequate for the tube seals. Tom, W8JI; /archives//html/Amps/2000-09/msg00939.html (8,076 bytes)
17. [AMPS] Alpha 87a - Fault Code 1 (score: 1): Author: dick.green@valley.net (Dick Green); Date: Mon, 21 Aug 2000 07:36:12 -0400; minutes I think tube leakage would cause a different fault. According to the 87A manual, fault code #1 indicates insufficient back bias on the PIN diodes with key down. It's a soft fault if no RF wa; /archives//html/Amps/2000-08/msg00393.html (7,907 bytes)
18. [AMPS] Reducing LK550-ZC Fan Noise (score: 1): Author: dick.green@valley.net (Dick Green); Date: Wed, 30 Aug 2000 01:02:15 -0400; Hello AMPers, long time no see. I've got an old Amp Supply (really Amp International) LK550-ZC that I rehabbed about 18 months ago. This is the three-hole 3-500Z model with a temperature controlled d; /archives//html/Amps/2000-08/msg00515.html (9,003 bytes)
19. [AMPS] Do not pass Go... (score: 1): Author: dick.green@valley.net (Dick Green.); Date: Thu, 15 Jun 2000 02:39:49 -0400; believe operating Sorry for the off-topic post, but I can't resist: Speaking as a 25-year veteran of the computer software industry, the Microsoft case is anything but clearcut. Personally, I have v; /archives//html/Amps/2000-06/msg00193.html (10,682 bytes)
20. [AMPS] Hot Switching (score: 1): Author: dick.green@valley.net (Dick Green); Date: Sun, 19 Mar 2000 17:57:44 -0500; Hello, AMPers. Long time, no see. Someone asked me a question about hot switching today. I thought I understood this subject, but while I was thinking it through, I realized that I'm not entirely sur; /archives//html/Amps/2000-03/msg00818.html (9,604 bytes)

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