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In Reply to: RE: Choke for biasing driver tube posted by DAK on August 29, 2016 at 10:21:49
"I was wondering if this might be an improvement?"Depends on the circuit and what you're trying to accomplish.
If it's a differential amp relying on a non-bypassed common cathode resistor for corrective feedback then a choke (with it's much higher impedance while still providing the proper DCR for bias purpose) will give more feedback.
But in that case a SS CCS might be even better.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Edits: 08/29/16Follow Ups:
Thanks for the reply.
If it's a differential amp relying on a non-bypassed common cathode resistor for corrective feedback then a choke (with it's much higher impedance while still providing the proper DCR for bias purpose) will give more feedback. But in that case a SS CCS might be even better.
Can you define differential amp? i am not sure about that term. But in my amp i have a single side of a 6sl7 driving a 6550. Each section of the 6sl7 has its own bias resistor. The signal is split before the 6sl7 and each section handles half of the signal. If that is a differential amp then i got one. cheers
The driver stage in a Williamson circuit (V2) is one example of a differential amplifier.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
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