[Amps] RCA load impedance calculation

[Steve Thompson]

Peter Chadwick wrote:
> Isn't the load impedance Rl = Vs*2/2Po
> Vs*2 is the peak to peak anode voltage swing squared
> Po is the  max output power
I was about to make the same comment - except Vs is the supply voltage, 
not the peak-peak swing. Where the anode/collector/drain doesn't go down 
to 0V, use (Vs-Vmin) in place of Vs. It's a first approximation as it 
assumes that the voltage swing is a sine wave.

Steve