Hello everyone,
My ‘09 rockerverb 50mki has developed a noticeable 60 hertz hum when the amp is on. Also turning up the reverb dramatically increase the hum and noise. It’s not a 120 Hz hum. Definitely a lower pitch hum. I have the amp on an isolation transformer and I have replaced all the tubes and reseated the plugs to the reverb tank. The hum happens with nothing plugged in and all the knobs at 0 as soon as I turn it from standby to on. The amp is completely silent when it’s in standby. I have attempted to plug in to the effects loop in but that did not resolve the issue either. I have even tried unplugging the reverb tank and that did not help either.
Any advice would be greatly appreciated.
Rockerverb 50mki combo 60 hertz hum and reverb noise
Moderator: bclaire
Re: Rockerverb 50mki combo 60 hertz hum and reverb noise
You hear it even with nothing plugged into the input? That's not right. If you've already replaced all the tubes, I think it's time to take it to a tech. I know that's not what you want to hear, but it sounds like a deeper issue (maybe something coming ungrounded or some sort of short?).
RV 50 MKI | TH30 | RV 50 MKIII
G&L Tele (ASAT Classic) | Musicman Bongo 5
Anesthesia - Post-Rock/Ambient band - anesthesiaproject.com
G&L Tele (ASAT Classic) | Musicman Bongo 5
Anesthesia - Post-Rock/Ambient band - anesthesiaproject.com
Re: Rockerverb 50mki combo 60 hertz hum and reverb noise
Hum like that could be a failing filter cap, possibly one of the output tubes on the way out (ie mismatch), to find out you really need a signal generator/scope to find out where the noise is coming from in a logical manner.
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