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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.

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