#1
I own a silverface, late 70s deluxe reverb that is apparently sick. the sound coming out is distorted with a bunch of fizz and no projection whatsoever. the volume swells up and down and after about 5 minutes the normal sound will come back. it'll stay normal for about 10 minutes and then the fizz and decrease in volume is back. i believe it's just a tube issue, but i have wondered if it could be wiring issues or speaker problems.

is this just simply a tube issue? i remember this happening to my boogie, and a quick swap of preamps had it back and running. if so, do i have to actually get the amp rebiased with the tubes? i don't want to just pop them in the pots and do something wrong.

It scared me seeing as how i've had it for only a month. i hope it's nothing major but any help on this topic would be very appreciated.
'79 Fender Deluxe Reverb
Gibson Les Paul Classic
Fender Stratocaster
Ibanez TS9, Keeley TS9 Baked Mod
Zendrive

LOOOOOK INTOOOOOO THEEEE PICCCTUREEEEEEEEE


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#2
This seems like a bad preamp tube. Preamp tube don't have to be biased