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RE: Micheal Rothacher understands Class A

You are confusing the Class A1 vs. Class A2 issue with the linear operation issue again.

Linear operation is indicative of Class A (1 or 2) operation.

Non-linear operation (truncated lower half wave form) is indicative of Class A/B or Class B operation.

Just because you can and do run the M-60 into A2 does not mean that the wave forms can get non-linear (non-symmetrical) while still claiming Class A operation.

Tremaine Audio-Cyclopedia 2nd Edition page 523 "The quiescent plate current is selected for a value in the most linear portion of the plate-current characteristic."

Page 543 "What is a class A amplifier? An amplifier in which the grid-bias voltage is set to approximately one-half the cutoff voltage to obtain linear operation."


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