[sylvania]

Audio output tube voltage is wrong, Pin 8 shows 125v which checks correct. But on pin 3 I have 287v Sams shows 150 and pin 4 I have 274v Sams shows 140.What would cause this? I have checked resistors and wiring and can find nothing wrong or out of spec any ideas? And this is set at 108v if I raise it to 117v I am getting over 300v on these pins. On pins 3 and 4 shows large dot Sams say this is measured from 125v line