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1. [Amps] Drifting grid current (score: 1): Author: Martin Sole <msole@loxinfo.co.th>; Date: Sat, 03 Nov 2007 20:07:57 +0700; Having read with interest the recent 8874 thread I am prompted to ask a question that has been bugging me for a while. My Alpha 78 with what I believe are 3 NOS 8874 tubes, 2 from one source third fr; /archives//html/Amps/2007-11/msg00038.html (6,904 bytes)
2. Re: [Amps] Drifting grid current (score: 1): Author: "jeremy-ca" <km1h@jeremy.mv.com>; Date: Sat, 3 Nov 2007 11:49:26 -0400; Does it happen on all bands and into a dummy load? If so I'd suspect a tube. If it happens on a band that fixed capacitors are switched in then I'd suspect them. There could also be something heating; /archives//html/Amps/2007-11/msg00040.html (8,091 bytes)
3. Re: [Amps] Drifting grid current (score: 1): Author: Martin Sole <msole@loxinfo.co.th>; Date: Sun, 04 Nov 2007 07:33:10 +0700; Thanks for all the useful thoughts and ideas about my drifting grid current. It doesn't drift at the moment but that is because it will not switch on Whilst trying 15M at about 1200 watts it went pop; /archives//html/Amps/2007-11/msg00049.html (8,754 bytes)
4. Re: [Amps] Drifting grid current (score: 1): Author: Alek Petkovic <vk6apk@eon.net.au>; Date: Sun, 04 Nov 2007 12:07:10 +0900; G'day Martin You mentioned a black mark on the plate cap but you never mentioned the large brown stain in your underpants caused by that flashover. Try Dr Alex, UR4LL for replacement caps. He is very; /archives//html/Amps/2007-11/msg00051.html (10,062 bytes)

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