Solid State Guitar Amp Forum | DIY Guitar Amplifiers

This may interest all who install a new tank and get funny squeals.

I have bought a like-new Peavey Special 212, the reverb was dead. When I wound up the control, hum would appear. This would suggest an open connection.
I now did the usual problem exclusion procedure and bang: the output side was open.

I read a little and all reverbs seem to come from the very same company these days.
Some say, despite that, MOD are better. Indeed they do not have the transducers plugged with some connector, but rather soldered directly.

I installed it and it did its job, but even at cautiously low volume and moderate control settings, feedback would works its way up slowly. Exactly like a microphone on the verge of feedback howling.

I had noticed that the transducer coils are loose, not as bad as on the replaced tank (which was an accutronics), but loose.
A dab of fast settling MMA glue (structural, won´t drip...) on all transducers cured that within minutes.

Some people have sent their tank back at this point, just to receive an equally bad unit that worked by chance.

I had written to Rod Elliott over the matter and he reckons that rattling coils may be the cause for accelerated material fatigue of the small wires. He also pointed out to stay away from the magnets and the suspension of the springs with the glue - naturally.