I have a Champ 25 PR202 which got from my brother 4 years ago. He loved the clean channel and never used the distortion circuit. (jazz). I love the clean sound but can’t raise the volume or gain pots beyond 3 or the unit starts to oscillate and howl. Installed new tubes to no avail. One thing I have noticed is that the circuit board directly over two Zener diodes is blackened. They are 1N5353B. Do Zeners overheat before they fail or do they just quit.

I have had one myself for like 20 years… I did scale the speaker to a Jensen, and have been using different mullard tubes… I consider it has all the Fender clean magic… Clean is the only channel I use, since I really dislike the distortion one… It is indeed an underrated unit… I certainly won’t get rid of mine… I am struggling to find out how to use a Bugera power attenuator with it, since I want to get max tube sound at bedroom level…

I have a mint 25SE that I bought new and have never gigged it. It is all original and may be the best 25SE available. It’s always had its Fender cover on it, has foot switch too. Pristine 25SE…I still have the tags from the music store along with the manual and schematic.