Greg, what a great idea. However if four were used in a full wave bridge configuration, you could heat the whole cockpit area. Wonder what the filament draw would be?? I have a couple of radio's with 5U4G tubes. Been a Ham radio operator for about 30 years. Richard Blair WA6TTF N99997 - 415D St. Marys, Ga. 4J6 [EMAIL PROTECTED]
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