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1. [Amps] 3CX400/3CX800 Socket (score: 1): Author: Charles Hedrick <cchedrick@gmail.com>; Date: Mon, 30 Jan 2012 10:16:32 -0500; Good morning all, I have and would like to add a third 8874 to my Alpha 76 but need a socket and plate cap. If anyone has these to part with, please let me know. Thanks, Cam WA4JKW __________________; /archives//html/Amps/2012-01/msg00291.html (6,447 bytes)
2. Re: [Amps] 3CX400/3CX800 Socket (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 30 Jan 2012 11:12:51 -0500; The plate clamp used is simply a push on big resistor type clamp and maded of plated steel. I tossed them in my 76PA as they were corroded from Carribean living at a contest station. Ive had many oth; /archives//html/Amps/2012-01/msg00292.html (8,069 bytes)
3. Re: [Amps] 3CX400/3CX800 Socket (score: 1): Author: Vic K2VCO <k2vco.vic@gmail.com>; Date: Mon, 30 Jan 2012 09:37:58 -0800; What happens, I think, is that the RF heats any ferrous metal, making it oxidize. That's why hardware in RF fields needs to be non-ferrous. I suspect it must be getting red-hot in order to do that. W; /archives//html/Amps/2012-01/msg00294.html (8,814 bytes)
4. Re: [Amps] 3CX400/3CX800 Socket (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Mon, 30 Jan 2012 12:59:30 -0500; Quick story: Back in college, I rebuilt the PA cavity of an RCA 5KW FM transmitter. The owner of the station was an ex-CBS Radio engineer. When I completed the hardware assembly, he asked what I use; /archives//html/Amps/2012-01/msg00295.html (8,689 bytes)
5. Re: [Amps] 3CX400/3CX800 Socket (score: 1): Author: Rob Atkinson <ranchorobbo@gmail.com>; Date: Mon, 30 Jan 2012 12:01:18 -0600; Adding a 3rd tube is an interesting issue. First I am speaking in general terms. I am not familiar with the 76. I have pondered this as a paper exercise and came away thinking there is a lot more to; /archives//html/Amps/2012-01/msg00296.html (8,542 bytes)
6. Re: [Amps] 3CX400/3CX800 Socket (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 30 Jan 2012 13:34:45 -0500; It didnt faze Alpha Rob. There is room for a socket on the tube box and thats all they did for the PA/CA. The rest remains the same except for the transformer and top cover. Some also had holes on th; /archives//html/Amps/2012-01/msg00298.html (9,855 bytes)
7. Re: [Amps] 3CX400/3CX800 Socket (score: 1): Author: Rob Atkinson <ranchorobbo@gmail.com>; Date: Mon, 30 Jan 2012 14:51:50 -0600; Thanks Carl; that's what I figured with alpha--not at all like adding a third tube to a SB220. 73 Rob K5UJ _______________________________________________ Amps mailing list Amps@contesting.com http:/; /archives//html/Amps/2012-01/msg00301.html (8,411 bytes)
8. Re: [Amps] 3CX400/3CX800 Socket (score: 1): Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>; Date: Mon, 30 Jan 2012 18:33:00 -0500; I've also used the fin(s) out of old copper heat sinks for these as well as for the "hairpin" parasitic suppressors. it's easy to cut with a pair of hears. NOTE many metal shears will leave a rough o; /archives//html/Amps/2012-01/msg00304.html (8,665 bytes)

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