Been trying to get a UTC W-10 up and going.
Replaced the caps and have been checking the usual suspects.
It has two test points to check the cathode currents. 55ma each.
What happens is this when it first powers up it looks pretty good.
After about 5 minuets the currents creep up to say 70 ma.
This is due to power supply B+ voltage creeping up.
Here's the circuit
http://bit.ly/2H1UjwGTubes test OK.
Anyone know what B1 and B2 voltages should be?
Perhaps loading resistor????
Suggestions...........