"W5DXP" wrote in message
...
How do you know that the amplifier is not "delivering" 100W of forward
power
and dissipating 100W of reflected power (as it would with a
circulator+load)?

Aha, I will give you special dispensation. You are allowed to bias the amp
for true class B, and measure the DC drain current. No way is the drain
current going to be different from the case of a plain open circuit. Power
(RF) can not be more than Power (DC)

How do you prove that the impedance looking back into the amp is zero,
infinity,
or purely reactive?

Use any RF impedance meter you want.

Doesn't it have everything to do with the arbitrary
definition of "delivered" which doesn't necessarily match reality?

I think the only alternative in un nice; namely that there is no reflection
in steady state

Tam/WB2TT
--
73, Cecil http://www.qsl.net/w5dxp



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