Ok, I got this old Supro Vibra Verb that I've been trying to fix. The thing about this amp (ch2-trem/reverb ch) is that when the volume is at 0 there is NO hum but as I increase the volume the hum just goes through the roof (big hum here). The higher I go on the volume, the higher the hum. Also, the amp distorts at 2 (way too early- using a strat for pete's sake). Bit of hum on ch1, but not as much (still there though). Ch1 (non trem/reverb) also sounds anemic (not much volume here at all). The weird thing about this circuit is that it uses a photo sensor/bulb to get the vibrato and the sensor is wired to the same preamp tube that drives the 2nd channel. I don't have a way to check filter caps but is it possible that the filter caps are shot?? Any ideas where this hum/distortion could be coming from??
Thanks
Joseph
Thanks
Joseph
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