Steve Nosko wrote:
"First, my "class C" model is as follows: I liken it to digital or
"switched modes"."

I do too.

"----Second, it is the RMS current through the tube which will waste
power, so that is what we must be concerned with."

I don`t believe current through a Class C amplifier consists of an
ordinary sine wave. I think it consists of short unidirectional pulses.
The tuned "tank circuit" is the source of sine waves.

RMS is the effective value, not the average value, of an a-c ampere. It
is defined as 0.707X the peak value of the waveform. It is derived from
the average of the squared current over a half cycle, as the heating
value of an ampere is proportional to the current squared.

Speaking inversely, the ratio of maximum to effective value for a sine
wave is 1.414, which is the square root of 2.

Ordinarily, with nonsinusoidal currents, the ratio of maximum to
effective value is not the square root of 2.

Best regards, Richard Harrison, KB5WZI