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

The answer is no

the ac does not flow through the cathode resistor.

It flow through the bypass cap that has a very low reactance to all frequencies of interest if it's the right uf value.

Therefore the bias DOES NOT vary "according to musical demand".

What did you think the bypass cap was for other than holding the bias steady?

That is the sole purpose of a cathode bypass cap.

Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"



Edits: 09/03/17

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