GE 805 Focus Coil Question

[jr_tech]

Originally Posted by Chris K

The cathode voltage does vary from 130 to around 260 when the brightness pot is turned to the halfway position. G1 doesnt change nor does G1

I suspect leaky/shorted caps in the circuit surrounding the brightness control.

C-303 would be my most likely suspect.

jr

[Chris K]

Originally Posted by jr_tech

I suspect leaky/shorted caps in the circuit surrounding the brightness control.

jr

The first one certainly was. I bumped it up to 450 volts for a few seconds on the capacitor tester just to be sure it was full of electrons but no eye opening at 25V.