Sylvania 336mu

[DaveWM]

Originally Posted by sylvania

I will try to make this clear as I can, The audio tube 6W6GT pins voltages are wrong. I have over 300v on pins 3 & 4 Sams shows It should be 150 & 140v. Pin 8 Sams shows 3v I read 125v. Pin 3 Sams shows -11 I have + voltage on that pin. My audio was not sounding clear until I lost high voltage while troubleshooting voltages then it cleared up, so the high voltage was causing interference with sound. Upon checking why the high voltage quit I found the two damper tubes 6V3A and one horz output tube 6BQ6GT went bad. I check voltages on all other tubes and they were to spec and checked resistors have not found but a few out of tolerance. I had a dim picture and sound until high voltage quit, but as time went by picture got worse. Now have sound only. Until I get voltages correct on tubes what is the best way to protect the high voltage section? I see a lot of different theory's on how to protect the high voltage section.

so when you connect the postive of your meter to pin 8 and the neg to the 125v line you get 125V so you are getting a voltage drop 125v across that 68 ohm resistor?