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Re: Max anode voltage?

Original poster: Ed Phillips <evp@xxxxxxxxxxx>

I should point out that most power amplifier tubes carry a maximum DC [repeat DC or plate power supply] voltage rating, which in the case of the GU5B is 5 kV for operation under 30 MHz. That would mean that, in typical "within ratings" Class C service, the peak plate voltage would swing up to very close to 10 kV with respect to the filament at the peak of the RF cycle. Like many of the surplus Russian supply hat's quite a gutsty tube and I would think that in intermittent TC service it would be quite reliable with an output power of as much as 10 kW or perhaps even more, WITH VERY VERY CAREFUL CIRCUIT DESIGN AND ADJUSTMENT. If you play with high power oscillators and don't know what you're doing the tube can go west very quickly.