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Off the emitter, or op amp output. You should cap-couple it to the next stage.for tubification:
Guitar Pedals: Gyrator Filter Calculator
Anyone have caveats I should know about before I undertake this? Like... where is the output being taken from, off R1?
Off the emitter, or op amp output. You should cap-couple it to the next stage.
Changing the value of R1 will cause little change in the emitter voltage and current unless R1 is huge, because the base current will only be a few microamps.So then after the 10k resistor in the schem, right? I hope I'm understanding it correctly that this is essentially meant to be a cap-coupled cathode follower (emitter-follower) with neg local feedback.
That would then make the 4.5v in there off R1 analogous to a bias supply, which varies according to the value of R1, and then R2 varies the amount of feedback.
I will have to experiment and breadboard this up to understand it. Thx!