08-29-2017, 10:31 PM
The deal is this measure the DC voltage from one leg of the 80 filament to the center tap of the power transformer. When you first turn it on the DC volt will spike up as the 80 is directly heated and all the other tubes have cathodes. The 80 will start to deliver high voltage before all the others cathodes are hot causing the tubes to draw plate current.
Essentially the power supply has no load for the 20-30 seconds.
If the voltage spikes above 400v at startup go w/the 450v.
Essentially the power supply has no load for the 20-30 seconds.
If the voltage spikes above 400v at startup go w/the 450v.
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!
Terry
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