SET Asylum

Single Ended Triodes (SETs), the ultimate tube lovers dream.

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RE: SET Power supply in series with output trans

Posted by Paul Joppa on October 30, 2016 at 12:50:02:
SETs in general are borderline AB - that is, while the output triode is never really cut off, its average current does increase with power. It's not as severe as typical PP amps, but it's not insignificant either.

For example, in the 1950 data sheet for the 300B (which is the one I have at hand this morning) there are two suggested operating points. One has 62mA no signal and 74mA at full power; the other is 60mA to 77mA.