Quote from: scooperman on September 20, 2010, 12:04:59 PM
The parts list helped a lot, because there are times when you can't identify a component,

Q9, need to know what that is

On a friend's Peavey-Musician, Series-400 bass head; at any volume other than the lowest low I get a high-pitched ring that increases with either gain or volume. I want to make it clear right now that this is not feedback. Sounds similar to some voltage leaks I've heard in the past where a bad electrolytic was leaking DC into the ground. Problem is, I can't find it. I don't have a capacitance meter and am without a scheme to see what values are supposed to be present in some of the worn down components.

The amp is solid state and high wattage with HUGE filter-caps, so I want to see if any-one has had this issue before before I blow up another cap-drain, lol

The two pics are of the amp itself to maybe jog a memory and of a component in the power-amp, RIGHT before the output, that i"m having trouble identifying. it's in pretty bad shape and if it's a choke I bet it's the culprit.

Quote from: phatt on September 20, 2010, 04:52:07 AM
Hi Chris xyz, (not even gonna try to spell it)

If knocking the tank produces sound then the pickup end is working but the driver end will likely need work.

Now that's helpful!

The change-out is fine, it's a match. How would you go about finding and testing the drivers?

I'm replacing the infamous cardboard tube reverb tank in my Silvertone with a traditional spring box BUT I want to get it functioning the way it was intended first. I can physically knock the tank and get verb but playing doesn't actuate it.

I have one clue though: only one of the two coaxial leads that go to the tank has a decent audio signal, the other one is weak sounding ... I don't know, but I think both should be pretty hot, right?

Quote from: J M Fahey on April 29, 2010, 03:49:16 AM
If you ever take that reverb apart, *please* post some pictures; those transducers are as unconventional as they come, to put it mildly.

If you're still looking to learn about this reverb tank, I'd be glad to share some images