Twin reverb added bias pot to matching balance pot low watts per tube

[Bassden]

tdvt  Yes, I will be looking for anything conductive between leads and eyelets for sure. I can feel some extra solder in two places inserting my little finger underneath on end of the board. It is very difficult to inspect a main board all soldered in. I've been soldering for a long time and I know it can grow in places one might not want it. I have not run into a bad board that is over soldered causing flux to run between leads and eyelets that cause a partial short. A couple of times I ran across a strand of wire on the back of a tube socket making contact with the wrong pin causing different outcomes. I've had to replace all 4 6L6 GC sockets in the last repair I did because of no output. I also cannot see inside a socket causing a short or an open. Also had a bent pin on a preamp socket one time. Strange brew, kill what's inside of you by replacement. LOL.Thank you for all the information. Y'all are fantastic.

[Bassden]

tdvt I have the new boards on order.
I have the main board and the ps board removed and now for the first time I smell a lot of what looks like dried beer. It is thick and goowy. It is in between the boards and the chassis, dried and stinky. All around the brass grounding strip mounted with all the pots. I need to pull that off somehow. It's soldered to the chassis in to places. Still working on it.

[Bassden]

second pic

[Esquirefreak]

Check out Psionic Audio on Youtube if you have not already seen his vids where he cleans the eyelet boards. I think Lyle is doing a great job showing vital maintenance and service for these old Fender amps.

/Max

[Bassden]

Esquirefreak   Thank you

[Bassden]

Things are looking better now. The half voltage problem, gone, the background noise, gone. I hear twice the power now. And no noise. Very high volume on both channels  with all new transformers I swapped from my new build. 455vdc on the plates of the output tubes.
I’m still voicing this out and not hearing a real strong reverb yet.  Still need to bias the output
Tubes and initially that is looking good.
At this point I do not want to even try the old transformers. This one will be the most extensive repair yet.
What I will do though is try the old transformers in my new Bassman 100 build and see if they work in it.
This Twin Reverb and the Bassman 100 share the exact same transformers. Power, choke and output. Kept the reverb trans and the input jacks and chassis, everything else is new.
Parts all about $500 all from Antique radios and  transformers from Hawk Electronics.

In all I did, I really have no clue what was causing the voltage to be halfed creating the noisey output.
I was hoping as I removed everything I might find the problem but that is a nope. When I first turned it on before all of this there was volume and power but noisey background at higher levels.
I even replaced all the wiring with wiring I have been using from all the organs I’ve taken apart watching
Gauge size to specifications.
The original wiring’s insulating rubber was very frail and extremely hard and some of it broke apart as I removed it.
Some of those may have been magnetically coiled in some way to cut the voltage but that is just
A speculation. It also had internal liquid of some sort that smelled like raunchy beer. I had to remove the
brass backer when I removed the pots and clean it. I cleaned it and the chassis with acetone.