[Amps] 4CX250 IMD

[Tom Rauch]

Peter wrote:
That´s the efficiency I always wanted to obtain!>>

Someone else wrote:
Input power is 500WDC, Output is 470W PEP, not key down CW. 
 >>

DC input power is power indicated on plate voltage and 
current meters. It is an average power. it would indicate 
the sum of the two tones in respect to input power.

RF output power is PEP, which would be four times the single 
tone or two times the average power in a two-tone test.

So we have:

 1000W PEP input, and 470W PEP output. 47% efficiency

or we could view it:

500W average input and 235W average output 47% efficiency

Technology to build a very good PEP meter was available as 
soon as man invented and learned how to work with the 
capacitor, diode, resistor, and meter. My assumption is most 
people working in electronics knew all four important things 
long before 1960.

73 Tom