I own a 55 Tremolux, I just bought the caps to replace the originals. Anyone care to coach me through changing them in the amp?
First, make sure you've drained the caps of any dangerous Voltages.
Unsolder all connections of the electrolytes highlighted in RED.
Replace the caps making sure the ORIENTATION of + and - is exactly how they were placed before.
Thats it. The GREEN caps are electrolytes as well...but I STRONGLY recommend you only replace the power caps that are RED. The Green ones should still be working strong.
The White Amp is actually a Tweed Princeton, not a Champ. They are great amps. Got a few myself. Seen a number Fender amps over the years that people got, and didn't want to change the old capacitors on. Some were fine. Some had to have a transformer rewound or replaced. I've never had one come in that didn't sound amazing after replacing the caps. Their is no gain in tone by keeping the old caps if you replace them with correct value new caps.
I have definitely heard amps that came out sounding worse after a cap job.
Then I would find a new tech.
Replacing the original filter caps with the correct value shouldn't make an amp sound worse. Using the wrong value, or the wrong type will make an amp sound worse, which is done by a lot of hacks. Especially when they don't have the correct value.
The potential for damage to the transformers in an amp because of old filter caps is more than I am willing to accept. There is no benefit tone wise to keeping them. Benefits to changing them include transformer protection, less ac ripple and hum, correctly biased and working tubes.