Well guys, thanks for the spirited discussion,
JMFahey you made some good points, however there's one thing.
What about the move of the RC coupling to a stage that can't be overdriven, isolating it from the effects of grid current and the resulting bias shift.
Now...... whether or not that is worth the other tradeoffs is the question.
This idea is in part an ongoing pursuit of alternative ways to drive/couple the power tubes to eliminate or reduce bias excursion in overdriven guitar amps.
That is why this project is now transformer driven triode output [other thread].
And next idea: transformer coupled "enhanced triode class B
By the way , + 1 on no NFB
Thanks,
Mark
JMFahey you made some good points, however there's one thing.
What about the move of the RC coupling to a stage that can't be overdriven, isolating it from the effects of grid current and the resulting bias shift.
Now...... whether or not that is worth the other tradeoffs is the question.
This idea is in part an ongoing pursuit of alternative ways to drive/couple the power tubes to eliminate or reduce bias excursion in overdriven guitar amps.
That is why this project is now transformer driven triode output [other thread].
And next idea: transformer coupled "enhanced triode class B
By the way , + 1 on no NFB
Thanks,
Mark
Hi Guys
You don't have to worry about bias shifts in the output stage if you use transformer ddrive, cathode follower drive, mosfet source-followers, or screen drive - the latter does not apply to your triode amp... oop.
Why even worry about bias shift since it only happens at clipping? if you are trying to make a clean amp, then clipping would be avoided anyway and the bias-shift issue is irrelevant.
Have fun
You don't have to worry about bias shifts in the output stage if you use transformer ddrive, cathode follower drive, mosfet source-followers, or screen drive - the latter does not apply to your triode amp... oop.
Why even worry about bias shift since it only happens at clipping? if you are trying to make a clean amp, then clipping would be avoided anyway and the bias-shift issue is irrelevant.
Have fun
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