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1. [AMPS] 77 filter cap (score: 1): Author: n4uq@mindspring.com (Dick Byrd); Date: Tue, 01 Apr 1997 14:07:27 -0500; Sean, one Peter Dahl replacement for the 77 was troublesome. It, however, was a 50 microfarad with similar physical dimensions. The owner I'm thinking of blew a couple of those. Peter told him they h; /archives//html/Amps/1997-04/msg00017.html (6,939 bytes)
2. [AMPS] Alpha 374A (score: 1): Author: n4uq@mindspring.com (Richard Byrd); Date: Mon, 10 Mar 1997 14:01:41 -0500; Matt, your 374A likely has a bad tube. Excessive PA current is sensed from a cathode resistor and turns off your rig (hopefully before the fuse blows). Often the tube will exhibit the short after a f; /archives//html/Amps/1997-03/msg00111.html (8,625 bytes)
3. [AMPS] Alpha 77/WARC (score: 1): Author: n4uq@mindspring.com (Richard Byrd); Date: Tue, 11 Mar 1997 12:06:28 -0500 (EST); Lee the 77 will work just fine on 17 meters. Put the bandswitch in the 15 Meter postition and use your transceiver's antenna tuner to improve the match. The input tuning on the 77 is fairly broad but; /archives//html/Amps/1997-03/msg00124.html (8,863 bytes)
4. [AMPS] amp conversions (score: 1): Author: n4uq@mindspring.com (Richard Byrd); Date: Tue, 11 Mar 1997 12:29:53 -0500 (EST); Jim the Alpha 76 is the most popular and most straightforward rig of the old Alphas. It runs three (in some cases two) 8874 tubes. It is easily converted to run a pair of 3CX800's. The only problem h; /archives//html/Amps/1997-03/msg00125.html (9,588 bytes)
5. [AMPS] Alpha 77SX (score: 1): Author: n4uq@mindspring.com (Richard Byrd); Date: Tue, 11 Mar 1997 14:40:57 -0500 (EST); Patrick the company did use two sizes of transformers in the 77 series. You are more likely to encounter the smaller transformer in a really old rig. Here's a quick fool-proof way to tell: Pull the p; /archives//html/Amps/1997-03/msg00126.html (9,268 bytes)
6. [AMPS] amp conversions (score: 1): Author: n4uq@mindspring.com (Richard Byrd); Date: Tue, 11 Mar 1997 15:22:45 -0500 (EST); Lee I'm a amplifier snob...I really like (most) Alpha amplifiers. Alot of articles have been written to salvage MLA2500's and I bet they all work ok. If the filament voltage is correct and the air fl; /archives//html/Amps/1997-03/msg00127.html (8,331 bytes)
7. [AMPS] amptalk (score: 1): Author: n4uq@mindspring.com (Richard Byrd); Date: Wed, 12 Mar 1997 15:05:07 -0500 (EST); Jim Henderson mentioned the folks at Svetlana were looking for someone to donate a good amplifier for them to experiment on. You'd think they would look for an engineer to donate some tubes to. My fr; /archives//html/Amps/1997-03/msg00137.html (10,936 bytes)
8. [AMPS] Re: Alpha 76A (score: 1): Author: n4uq@mindspring.com (Richard Byrd); Date: Wed, 12 Mar 1997 18:08:47 -0500 (EST); "The Alpha 76A, 76PA, and 76CA are self-contained high frequency linear amplifiers capable of bla bla bla... The 76A series is tunable over the range 1.8-2.0 mHz plus 3-22 mHz, optimized for convenie; /archives//html/Amps/1997-03/msg00139.html (9,242 bytes)
9. [AMPS] Alpha 77DX Bias Switching (score: 1): Author: n4uq@mindspring.com (Richard Byrd); Date: Thu, 13 Mar 1997 17:07:09 -0500; Usually the 'popcorn' sound can be fixed by allowing a tiny bit of quiescent (sp?)current to flow when the amplifier is keyed in SSB with no drive from exiter. The problem is caused by too much cutof; /archives//html/Amps/1997-03/msg00143.html (10,264 bytes)
10. [AMPS] more PA choke (score: 1): Author: n4uq@mindspring.com (Dick Byrd); Date: Fri, 14 Mar 1997 12:15:23 -0500; I'm running Carl's Radio Kit choke now in mine and it works ok but I don't have a 12M antenna so it really has not had a good work out. Also my amplifier is a copy of a 77 and minor differences in th; /archives//html/Amps/1997-03/msg00150.html (7,297 bytes)
11. [AMPS] good, bad, ugly (score: 1): Author: n4uq@mindspring.com (Dick Byrd); Date: Tue, 25 Mar 1997 21:43:52 -0500; Reading all the comments about which amps are junk and which ones can run all night long, etc. inspires me to comment. I have a sack full of burned up Alpha parts in my Lab-shack. They melt down just; /archives//html/Amps/1997-03/msg00240.html (9,798 bytes)
12. [AMPS] good, bad, ugly (score: 1): Author: n4uq@mindspring.com (Dick Byrd); Date: Wed, 26 Mar 1997 16:20:05 -0500; Rich I shall be happy to donate some dud 8877's to science. I tried to sell some for $5 as paperweights at the hamfest last weekend...nobody wanted them. I gave one to a friend but I still have thre; /archives//html/Amps/1997-03/msg00250.html (10,376 bytes)
13. [AMPS] Alpha 77DX Bias Switching (score: 1): Author: n4uq@mindspring.com (Dick Byrd); Date: Wed, 26 Mar 1997 16:42:42 -0500; Vince if you'll recall in one of our telephone conversations, I described the noise gate used on my rig. This problem with the Electronic Bias circuit is made worse by background noise in the shack.; /archives//html/Amps/1997-03/msg00251.html (14,206 bytes)
14. [AMPS] Alpha Amps (score: 1): Author: n4uq@mindspring.com (Dick Byrd); Date: Thu, 27 Mar 1997 16:38:22 -0500; Alpha rigs with a '7' as the prefix have not been produced for over a decade. You are lucky if you can get parts for them. Same story on the 374 and 374-A. Current production rigs are the 86, 87A and; /archives//html/Amps/1997-03/msg00272.html (9,871 bytes)
15. [AMPS] FET Power Amps (score: 1): Author: n4uq@mindspring.com (Dick Byrd); Date: Fri, 28 Mar 1997 18:14:41 -0500; I run a 2500 watt solid state Harris AM rig on 1520 kHz. It is the most trouble-free thing I've ever seen! It ducks lightening blips. Modulates 150 per cent on positive peaks. I don't have a clue how; /archives//html/Amps/1997-03/msg00291.html (7,957 bytes)

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