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RE: Neutralization of Miller capacitance


One could think of a [differential] two-stage 2a3 amplifier with overall gain in excess of 100.

Neutralization caps only work cross coupled across a differential stage.

BTW the 7b4 has a mu of 100 but in circuit the stage has a gain of about 55.

In a differential amp, CCS plate loads on the driver tubes would get you a gain of 100 (7b4, 12ax7, etc.) if direct coupled or close to 100 if cap coupled with the largest grid resistors allowed on the output tubes.


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


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