Well i fired the amp up to do some testing and while it didn't blow up, something ain't right.
All the preamp and supply cap voltages check out, they're reading a little high but its nothing extreme so I think its just my meter (its a $20 radioshack special
![Laughing :lol:](./images/smilies/icon_lol.gif)
Where things get weird is the power tubes. The plate is reading around 580v,its suposed to be around 500v. Its not super high, so I'm thinking that reading might be a meter issue.
Where things go crazy is the grid. Its reading a whopping -195v (supposed to be around -35v).
When I measure the cathode voltage it jumps to about 1.5mV but then drops down to 0. Its supposed to be around 35mV.
The heater voltage reads around 4vac, that's low isn't it? The tube definately aren't getting very hot, I was able to touch them after the amp being on for a while.
When I set the bias voltage I would get it to about 45ma, and then it'd just slowly rise higher and higher.
Also there is a faint but distinct background hum coming through the speaker even when the MV is at nothing. And absolutely no sound come through when I plug it in.
So yeah, any ideas? I'm stumped. The good news is i've had the amp on for about 2 hours now with no fires or weird smells, so thats a start.