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Old 6th Jun 2008, 9:11 pm   #4
Tractorfan
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Join Date: Mar 2008
Location: St. Frajou, l'Isle en Dodon, Haute Garonne, France.(Previously: Ellesmere Port, Cheshire, UK.)
Posts: 3,177
Default Re: Another (possibly silly) valve question

Thanks for the prompt responses. It's just that I heard somewhere years ago that cathodes can be "poisoned" if they're hot but not emitting. Maybe I was thiking of something else.
Perhaps because the HT was disconnected from the FM front end when switched to AM that old radios are often poor on FM when we get them for restoration. I may be wrong though.
Cheers de Pete
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Last edited by Tractorfan; 6th Jun 2008 at 9:14 pm. Reason: Left a bit out.
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