63 Pro Amp cap job. I think I broke somthing

[Jazz P Bass]

Signal Input

YES.
If you do not input a signal, how are you going to measure anything at the grid?

[dmartn149]

well, I got about 85vac on the socket that seems completely dead, and about 70vac on the other. So the OT is done? Is there anything I should check before replacing it so I don't ruin the new one? or should I just assume that the loose bias lead is what took out the old one?
Thanks

[dmartn149]

What kind of OT is this, and why would someone have mounted it and the choke right up against the power tranny? amp picture by dmartn149 - Photobucket

[Jerry]

That looks like an Ampeg transformer. Bruce might have a suitable replacement available or check out what's available at Allen amps, if you want to get the more correct type of replacement.

[Dave Curtis, dB AudioTech]

What kind of OT is this, and why would someone have mounted it and the choke right up against the power tranny? amp picture by dmartn149 - Photobucket

It looks like someone replaced the output tranny with a very large potted (read HiFi) OPT. You can see where the choke used to go; the holes right next to where it is now.

[dmartn149]

When unbolting it from the chassis, I found that I could remove one screw from the eyelet board and just get a wrench on the nuts. I think that's why it was mounted so close to the PT. Any farther over would have required removal of the eyelet board to access the mounting studs.

Bruce: I hope you are still following this thread. I hooked my old DMM like you suggested from lug 3 to center. and didn't get any change in B+ v. I then put the tubes in from my other amp (without the shunt) and re-measured. With those tubes I am getting around 493v. That's still more than the schem. says. but then it also says +or- 20%! So is 493v in the acceptable range? or in other words, Does it sound like everything is working okay except the OT and the old tubes?

I don't mean for that question to be just for Bruce. If anyone else wants to weigh in, that would be great too.

Thanks!