> Bingo. If he had ever experimented with an amplifier that had adjustable
> filament V. he would know that once RF output reaches normal PEP, there
> is virtually no further increase in RF output as filament V is increased.
Careing to set the filament voltage to obtain the proper emission, rather
than only keeping a fixed voltage, should extend the tube life noticeably
without affecting gain and output power.
73,
Mauri I4JMY
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