Help with a Bogner amp.

akerikels46

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Asking for a friend. I'm not sure if there's a separate sub for amps but i've been a subscriber of this sub for a while now so i figure i ask here. TIA.
"My Bogner Uberschall got goofy on me. It still works but suddenly lost all its punch. Almost sounds like a wah pedal pushed all the way down. Not that severe, but thats the best description i can think of. I replaced all power and preamp tubes, and of course tried running direct and replacung every cable/cab/guitar etc, none of that helped. Anyone have a clue?? [suspicious link removed by mod]
 
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Does it do it with the footswitch or without the footswitch connected? It also sounds like a failed cathode bypass electrolytic capacitor. Will need to be on a tech bench to resolve.
 
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