Reverb problem

[NWBasser]

I think I finally isolated my amp's noise problem to the reverb. As you may recall, I was having trouble with my Hughes & Kettner Edition Tube breaking up on the clean channel. I thought it was tube trouble, but the breakup wasn't a nice and smooth tube one. It's pretty harsh and nasty.

I don't why I didn't do this earlier, but today I turned the reverb down all the way and lo and behold it held a nice clean tone up to a decent volume. I turned the reverb up and got the nastiness.

I sprayed the contacts to the spring reverb with cleaner, but that didn't do the trick.

Anything else I should try?

[FrankenFretter***]

Shake the living $h*t out of it? Oh wait, use a m0th3rf*cking hammer. Just ask Brian!

[otaypanky***]

I'm not familiar with that amp but with the Fender style and Allen amps I use, a bad tube could cause those symptoms.

[sumitomo]

Shake the living $h*t out of it? Oh wait, use a m0th3rf*cking hammer. Just ask Brian!

If your interested that is Snap-On tool #BFH.Sumi

[tunghaichuan***]

Is it the Tube 20? If so you can find the schematic here:

http://www.schematicx.com/schematic/...-20-schematic/

The reverb is opamp-driven, so no tubes to deal with. It could be a lot of things, so I'll insert my stock advice here: you probably need to take it to a tech, unless you are skilled at repairing pcb-based solid state circuits.

[NWBasser]

Is it the Tube 20? If so you can find the schematic here:

http://www.schematicx.com/schematic/...-20-schematic/

The reverb is opamp-driven, so no tubes to deal with. It could be a lot of things, so I'll insert my stock advice here: you probably need to take it to a tech, unless you are skilled at repairing pcb-based solid state circuits.

At first blush, that looks to be the right schematic, but it depicts 4 of the EL 84s and mine only has 2. I also see what appears to be RCAs going to the reverb and in my amp there are no RCA connectors.

I'll check that site a bit to see if I can find the right schematic.

Thanks much.

[gregsguitars]

1- check and change tube(s).

2- does the reverb work ?
if not,

3- reverb drive or transformer (small ) could be bad.

4- check caps for leakage

5- check for a short in the chassis somewhere.

[NWBasser]

Shake the living $h*t out of it? Oh wait, use a m0th3rf*cking hammer. Just ask Brian!

The legend of the MFH is born!

[Tig***]

It's hammer time!

[otaypanky***]

[NWBasser]

[player***]

are spring reverb amphs a thing of the past? even my practice amph has one.
Hughes & Kettner have been around awhile.do they only do Tube verb now?

[NWBasser]

are spring reverb amphs a thing of the past? even my practice amph has one.
Hughes & Kettner have been around awhile.do they only do Tube verb now?

It's a tube amp with transformer driven spring reverb.

[player***]

It's a tube amp with transformer driven spring reverb.

I would have to say out of the last dozen or so Tube amps I've owned I have not seen a transformer driven reverb unit they were all independent of the amp electronics(at least to the naked eye) and all spring too.come to think of it adjustable spring at that.Marshall,Fender,Orange and a Vox extemely adjustable.others I had to take time out to do it if it needed it or I wanted to.always been decent at modding or fixing em if needed.

[NWBasser]

I would have to say out of the last dozen or so Tube amps I've owned I have not seen a transformer driven reverb unit they were all independent of the amp electronics(at least to the naked eye) and all spring too.come to think of it adjustable spring at that.Marshall,Fender,Orange and a Vox extemely adjustable.others I had to take time out to do it if it needed it or I wanted to.always been decent at modding or fixing em if needed.

Adjustable?

Can you change the spring tension or something like that?

[jim p]

This is a combo amp from what I see on the web so you could remove the reverb tank from the amp to see if it is an acoustic feedback problem. Just put the tank on the floor, stack of books or something high enough so there is slack in the RCA cable. You may want to try another RCA cable and make sure it is not pickup from how the cable is routed in the cabinet. Instead of removing the reverb tank if possible you can use the amp as a head and play through a cabinet to help isolate the reverb tank from vibration as a test. I would need to see a schematic to have any other ideas on a solution aside from trying another tube for the reverb driver and or the reverb recovery amplifier.