Richard Fry wrote:

Post below

REALITY CHECK: If tx source Z really was 50 ohms, a tx connected to a 50
ohm load would lose 1/2 of the RF power it generates to that internal Z.
And if that is true, then the heat produced by the tx, and the AC power
consumed by the tx would be proof of that.

That describes a Class-A amplifier.

However careful measurement of heat production and AC power consumption of
broadcast txs (for example) does NOT support the belief that the source Z of
a tx designed for 50 ohm loads IS 50 ohms.

With other classes of amps, the amplifier's individual component signals
are non-linear.
--
73, Cecil http://www.qsl.net/w5dxp




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