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1. RE: [Amps] RE: Alpha 87A Problems Solved (score: 1)
Author: "Dick Green WC1M" <wc1m@msn.com>
Date: Sun, 29 Feb 2004 14:50:33 -0500
Andy, I would keep after Crosslink for a description of exactly what they did to "fix" the problem. You may be right that they just disabled fault 17 or increased the tolerance. If so, that would be
/archives//html/Amps/2004-02/msg00311.html (42,388 bytes)

2. Re: [Amps] RE: Alpha 87A Problems Solved (score: 1)
Author: "Dick Green WC1M" <wc1m@msn.com>
Date: Tue, 2 Mar 2004 07:26:42 -0500
Nonsense. My 87A has worked flawlessly since 1995. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2004-03/msg00017.html (8,158 bytes)

3. RE: [Amps] SPIKE Question???? (score: 1)
Author: "Dick Green WC1M" <wc1m@msn.com>
Date: Thu, 25 Nov 2004 01:36:11 -0500
If the 87A is shutting down without fault lights, it's a hardware fault. When you restart the amp, the fault lights will indicate which hardware fault caused the amp to power down. Many things can ca
/archives//html/Amps/2004-11/msg00422.html (9,023 bytes)

4. RE: [Amps] Alpha 87A Problem (score: 1)
Author: "Dick Green WC1M" <wc1m@msn.com>
Date: Mon, 7 Feb 2005 03:32:12 -0500
Tom, The symptom you describe could be caused by a bad ON switch or by a problem with the microprocessor. Try unplugging the AC power from the amp, waiting a minute or two, then replugging. If there'
/archives//html/Amps/2005-02/msg00216.html (9,634 bytes)

5. Re: [Amps] FT-1KD and Alpha 87A input VSWR oddity (score: 1)
Author: "Dick Green WC1M" <wc1m@msn.com>
Date: Wed, 9 Mar 2005 13:24:47 -0500
John, Yes, it's generally not a good idea to use an automatic antenna tuner to compensate for a bad match between a rig and amp, especially a commercial amp that's been designed to present a good 50-
/archives//html/Amps/2005-03/msg00241.html (13,513 bytes)

6. Re: [Amps] AlphaRemote Software (score: 1)
Author: "Dick Green WC1M" <wc1m@msn.com>
Date: Tue, 5 Apr 2005 02:01:24 -0400
Byron, I've used the AlphaRemote software quite a bit. It's easy to operate the amp with the software, but I've not used it to remotely tune the amp. The program has controls for Tune, Load, Default
/archives//html/Amps/2005-04/msg00096.html (7,744 bytes)

7. Re: [Amps] Alpha 87A Fault 22 (score: 1)
Author: "Dick Green WC1M" <wc1m@msn.com>
Date: Sat, 9 Apr 2005 13:51:35 -0400
Never had that fault and haven't heard of anyone else having it. Sounds like a problem with the CPU or the supporting I/O chips. You should contact Alphapower support and ask them what to do. Just ou
/archives//html/Amps/2005-04/msg00200.html (7,616 bytes)

8. Re: [Amps] Alpha 86 (score: 1)
Author: "Dick Green WC1M" <wc1m@msn.com>
Date: Mon, 6 Jun 2005 15:11:46 -0400
FWIW, a member of our contest club had problems with massive IMD interference to other radios caused by bad PIN diodes in a used Alpha 86 he bought. Being a thrifty fellow, and not needing QSK for mu
/archives//html/Amps/2005-06/msg00048.html (10,716 bytes)

9. Re: [Amps] Alpha 87A OMEGA (score: 1)
Author: "Dick Green WC1M" <wc1m@msn.com>
Date: Wed, 15 Jun 2005 22:09:46 -0400
For the ham who has everything... _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2005-06/msg00109.html (8,835 bytes)

10. Re: [Amps] Alpha to Omega (score: 1)
Author: "Dick Green WC1M" <wc1m@msn.com>
Date: Thu, 16 Jun 2005 10:41:56 -0400
The open frame relay switches in additional inductance for the plate choke on 80 and 160. It's activated only when you change to/from one of those bands. It doesn't switch with T/R, so it doesn't nee
/archives//html/Amps/2005-06/msg00125.html (8,939 bytes)

11. Re: [Amps] alpha 87a and Pro II question (score: 1)
Author: "Dick Green WC1M" <wc1m@msn.com>
Date: Tue, 11 Oct 2005 18:59:53 -0400
Excellent response. Just so people won't continue blaming the amp, I had the same problem with a Kenwood TS-950SDX. At the end of this message is an old post to AMPS from Dick Erhorn that provides mo
/archives//html/Amps/2005-10/msg00290.html (14,970 bytes)

12. Re: [Amps] ALPHA 87A Fault 24 (score: 1)
Author: "Dick Green WC1M" <wc1m@msn.com>
Date: Sun, 16 Oct 2005 12:12:54 -0400
Fault 24 indicates that one of three internal voltages is too low -- high voltage, 0/15V or -109V. I think the most likely cause for intermitent fault 24 would be the main supply voltage sometimes di
/archives//html/Amps/2005-10/msg00427.html (8,298 bytes)

13. Re: [Amps] Alpha 87A (score: 1)
Author: "Dick Green WC1M" <wc1m@msn.com>
Date: Mon, 13 Feb 2006 13:04:39 -0500
Rick, Fault 17 means abnormally high or low gain. The CPU measures the power in and power out. If the ratio is out of normal specs, the fault is generated. This can be caused by a number of things, i
/archives//html/Amps/2006-02/msg00240.html (11,749 bytes)

14. Re: [Amps] My Alpha 87A is not changing between bands orsegmentsautomatically! (score: 1)
Author: "Dick Green WC1M" <wc1m@msn.com>
Date: Sun, 6 Aug 2006 22:18:16 -0400
Hamad, Does the amp work OK on all HF bands if you change bands on the 87A manually? 73, Dick WC1M _______________________________________________ Amps mailing list Amps@contesting.com http://lists.c
/archives//html/Amps/2006-08/msg00239.html (8,959 bytes)

15. Re: [Amps] Alpha 87a (score: 1)
Author: "Dick Green WC1M" <wc1m@msn.com>
Date: Mon, 1 Jan 2007 15:38:15 -0500
Jerry, Several things come to mind: 1. The coax link between the transceiver and 87A should be about 6 feet long, and definitely not less than that. ETO provided a 6' coax link with the amp, which yo
/archives//html/Amps/2007-01/msg00004.html (9,908 bytes)

16. Re: [Amps] Alpha 87a (score: 1)
Author: "Dick Green WC1M" <wc1m@msn.com>
Date: Mon, 1 Jan 2007 20:48:40 -0500
The 87A input network uses air-wound coils on 10m and 12m, so they'd have less adjustment range than the iron toroid coils used on the other seven bands. In fact, the 10m coil has only two turns! 73,
/archives//html/Amps/2007-01/msg00013.html (8,539 bytes)

17. Re: [Amps] Alpha 87a High SWR between Exciter and Amp vs BadBandswitch (score: 1)
Author: "Dick Green WC1M" <wc1m@msn.com>
Date: Wed, 3 Jan 2007 00:22:51 -0500
Jerry, Did you try just a 6' length of coax between the TS950S and the 87A? I'd be curious to know how that works, as it's the length originally supplied with the 87A. There could be a number of caus
/archives//html/Amps/2007-01/msg00035.html (35,562 bytes)

18. Re: [Amps] Alpha 87A - fault 9 (score: 1)
Author: "Dick Green WC1M" <wc1m@msn.com>
Date: Mon, 12 Feb 2007 14:28:24 -0500
Sounds like a bad PIN diode, but 87A fault codes don't always tell you exactly what's wrong. For example, it might have something to do with one of the power supplies. The factory has troubleshooting
/archives//html/Amps/2007-02/msg00228.html (8,049 bytes)

19. Re: [Amps] Alpha 87A (score: 1)
Author: "Dick Green WC1M" <wc1m@msn.com>
Date: Mon, 19 Mar 2007 18:18:43 -0400
Jiri, U2 on the High Voltage Power Supply Board is responsible for IP monitoring. I suspect your U2 has gone bad. The same chip went bad in my 87A, though the symptoms were not as drastic as yours. T
/archives//html/Amps/2007-03/msg00219.html (9,102 bytes)

20. Re: [Amps] Sequencing an Alpha 87a (score: 1)
Author: "Dick Green" <wc1m@msn.com>
Date: Wed, 23 May 2007 21:50:20 -0400
I had some off-reflector discussion with Larry and found that his concern isn't with the 87A T/R switching. After all, the 87A uses PIN diodes and should be able to switch fast enough to not require
/archives//html/Amps/2007-05/msg00185.html (10,528 bytes)

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