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1. [Amps] Alpha 78 problem (score: 1): Author: "Carol Richards" <n2mm@comcast.net>; Date: Sat, 10 Nov 2007 10:45:18 -0500; Hello........ During the last contest I began to develop a problem. When I key the alpha, non qsk mode, everything is fine. When I let up on the key the amp continues to mute the receiver. If I tap o; /archives//html/Amps/2007-11/msg00131.html (7,351 bytes)
2. [Amps] Alpha 78 problem (score: 1): Author: "Carol Richards" <n2mm@comcast.net>; Date: Fri, 16 Nov 2007 22:14:56 -0500; Thank you to all who responded to my request for help with a relay problem...After speaking with the folks at Alpha Power, The conclusion was either a faulty reed relay ($125) of the vacuum relay($15; /archives//html/Amps/2007-11/msg00224.html (6,964 bytes)
3. [Amps] Where to buy Svetlana 3cx800a (score: 1): Author: "Carol Richards" <n2mm@comcast.net>; Date: Sun, 2 Dec 2007 20:13:34 -0500; I am going to need a pair of 3cx800a equivalents made by Svetlana. Anyone know where I can purchase a pair? I prefer new ones..... Thanks, Carol _______________________________________________ Amps m; /archives//html/Amps/2007-12/msg00008.html (6,678 bytes)
4. Re: [Amps] Alpha 78 problem (score: 1): Author: "Carol Richards" <n2mm@comcast.net>; Date: Mon, 3 Dec 2007 20:23:01 -0500; Thanks Jim for the info.... _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2007-12/msg00014.html (7,828 bytes)
5. Re: [Amps] 4CX400 TUBE SOURCE & $ (score: 1): Author: "Carol Richards" <n2mm@comcast.net>; Date: Thu, 6 Dec 2007 16:55:08 -0500; Alex... The 4cx800a is not a replacement for the 8874, but you can easily get one for les than $75. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.; /archives//html/Amps/2007-12/msg00024.html (7,169 bytes)
6. [Amps] Fuses (score: 1): Author: "Carol Richards" <n2mm@comcast.net>; Date: Thu, 6 Jan 2011 19:43:34 -0500; In the last contest one of the fuses in my Alpha 78 blew. Actually it became extremely hot and transferred the heat to the cap of the fuse holder. I managed to really burn my fingers. Nevertheless, I; /archives//html/Amps/2011-01/msg00047.html (6,773 bytes)
7. [Amps] Fuses (score: 1): Author: "Carol Richards" <n2mm@comcast.net>; Date: Fri, 7 Jan 2011 16:52:23 -0500; Thank you to everyone for your thoughts and suggestions. from the responses I will need to: 1. Replace the fuse holder 2 Get fast blow 250v ceramic fuses- microwave oven fuses from home depot. 3. get; /archives//html/Amps/2011-01/msg00068.html (7,591 bytes)
8. [Amps] Alpha 78 (score: 1): Author: "Carol Richards" <n2mm@comcast.net>; Date: Sat, 25 Aug 2012 16:06:38 -0400; I am using an alpha 78 with a pair of 3cx800A's instead of the hard to get and afford 8874's. I get about 1200w output on cw. Not bad since the power supply only provides 2000V and I am only able to; /archives//html/Amps/2012-08/msg00416.html (6,708 bytes)
9. [Amps] Alpha 78 (score: 1): Author: "Carol Richards" <n2mm@comcast.net>; Date: Sun, 26 Aug 2012 13:31:45 -0400; Thanks to everyone who responded to my question. When the 78 was converted over to 3CX800A's, the caps were replaced. Judging from the weight of the transformer it is an EI version. The consensus see; /archives//html/Amps/2012-08/msg00445.html (7,676 bytes)
10. [Amps] Vacuum Relay (score: 1): Author: "Carol Richards" <n2mm@comcast.net>; Date: Thu, 6 Dec 2012 20:27:51 -0500; It looks like I fried another vacuum relay in my Alpha 78 operating it in qsk mode. It is either an HC or RJ type. Can anyone recommend a more sturdy vacuum relay for this amp and where I might get o; /archives//html/Amps/2012-12/msg00026.html (6,349 bytes)
11. [Amps] Buzzing transformer (score: 1): Author: "Carol Richards" <n2mm@comcast.net>; Date: Sun, 25 Sep 2016 14:02:06 -0400; Hello all.... This past weekend I ran into a new problem in the CQWW-RTTY contest. For some reason, the power transformer in my Alpha 76PA started buzzing big time everytime it was keyed.. The transf; /archives//html/Amps/2016-09/msg00114.html (7,059 bytes)
12. [Amps] Buzzing Transformer Follow-up Questions (score: 1): Author: "Carol Richards" <n2mm@comcast.net>; Date: Mon, 26 Sep 2016 14:40:01 -0400; Hello all... I happened to have a similar transformer from another Alpha amplifier, which is out for repairs.. I Installed it and all is fine. Now my big question... Since the original transformer is; /archives//html/Amps/2016-09/msg00123.html (7,094 bytes)
13. Re: [Amps] buzzing PA-76 transformer (score: 1): Author: "Carol Richards" <n2mm@comcast.net>; Date: Fri, 7 Oct 2016 12:11:55 -0400; Hello, I called Harbach and since they have the drawings for the Alpha 76 amps, i was told that they could wind a new hypersil transformer for $450. Carol ____________________________________________; /archives//html/Amps/2016-10/msg00027.html (7,159 bytes)
14. Re: [Amps] Alpha 76PA Conversion - Drive Issue (score: 1): Author: Carol Richards <n2mm@comcast.net>; Date: Tue, 30 Nov 2021 17:03:54 -0500; Steve, I had N4UQ make the conversion several years ago on my 78. I used original new Eimac 3CX800 s. I found the same results as you1300 w output with 80w drive. My alpha 76PA gets full output with; /archives//html/Amps/2021-11/msg00029.html (8,871 bytes)

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