JConstantineLV
New member
Biasing is for the power tubes, not preamp tubes.
boyedav":1czm97lp said:thanks for the info. the tubes are fused in pairs so I figured if one worked then the fuse was okay, but I'll check it anyway. I've got spares in any case.
I bet it's the shunt resistor. A problem with the screen resistor would show up other ways wouldn't it, not just the bias test point? I replaced the blown tube and it's partner, and the amp is back to 100%, except for the bias test point.
boyedav":s6jaioa2 said:Just a followup:
We had a break, so I took the amp to a tech, and he replaced the shunt resistor for the bias test point. Everything else checked out fine. Amp is back home, biases fine, and sounds great.
Thanks for all of your help.