Bigger Tubes are Better

GAD

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GGJaguar

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Holy crap, it's using a pentode (6L6GC?) to drive the giant triode!
 

Rocky

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Holy crap, it's using a pentode (6L6GC?) to drive the giant triode!
Not unprecedented. The Fender PS300 and PS400 amps used beam power tubes 6V6GTA and 6L6GC respectively as drivers. Essentially they're used as a single ended amp (like a champ) with the transformer secondary being center-tapped as a phase inverter. In the case of the P&K amp, there's no phase inversion necessary, because it's single ended. It must have a whole lot of grid current.

Some old Gibsons used transformers as phase inverters too, but not on that kind of scale.
 

dreadnut

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I was in USN avionics school in 1972; we were probably one of the last classes to learn tube theory.
 
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