Ampeg vt-60 help needed

[theedrstrangelove]

I've just obtained an Ampeg VT-60 from a closed electronics repair shop. It was re-capped, but one of the output xformer wires was not connected to it's proper jumper. It's the long red wire. I know it plugs onto one of the jumpers near that birds nest of a mess on the left side (rear facing you) I found the VT-120 schematic, but no help there. Does anyone have one of these? If so, would you mind taking a look inside and snapping a jpeg for me? Or just letting me know which jumper it plugs into. I thought working on my old v-4 and vt-40 was bad. This amp is a pain!

Thanks in advance from Florida on a rainy evening.

[Jazz P Bass]

The 'Red' wire typically is for the B+ connection. (J38)
Chances are it was disconnected for a reason.
As in the transformer is bad.
You really should check the tranny out before you reconnect that wire.

[theedrstrangelove]

Thank you so much Jazz!

The 'Red' wire typically is for the B+ connection. (J38)
Chances are it was disconnected for a reason.
As in the transformer is bad.
You really should check the tranny out before you reconnect that wire.

I checked the transformer out and took the chance it was okay. Plugged it into J38. No sparks, smoke, or anything else bad. But no sound except for a slight hum in the A channel. Took the pc board out and noticed the bias pot was bent back off of the board. The solder joint was good, but the pot is destroyed. Someone probably pushed it in trying to set bias. Oh well, off to skycraft surplus on monday for a trim pot.

Thank you once again.

[Jazz P Bass]

The bias pot is a divider to ground.
It missing should not prevent the amp from working.
The bias would be cold.
I would pull the output tubes & send a signal through the amp, while monitoring pin 5 (grid).
You should see a nice healthy Vac signal there.
If not, then the problem lies before that.