[Amps] Acceptable ripple on high voltage plate power supply...

[Bob D.]

Check my math....

For 10% P-P 120 Hz(full wave 60Hz rectified) voltage ripple at max current.

Ballpark math.

That's 7% RMS.

Power is proportional to square.
Ratio of sideband power will be 0.005
That's 5W total for two sidebands at a KW.

2.5W each. -26dB

This is at peak power. S meter reading  ratio is voltage so will be -52dB
on meter.
If a CWv signal is more than 40dB(on s meter) above noise, an exceptional
ear, that is looking for them, might hear the sidebands.

I could be wrong. I do recall reading 10% as the max in an old handbook.

The above us all at max current draw from the supply. Ripple percent goes
down with current draw. Power  in ripple sidebands goes down with square of
ripple percent.


73, -bob ah7i