How can I tell if the reverb unit is going bad....

Chuck Snider R.I.P. · From: West Virginia, USA - Morgantown, WV

How can I tell if the reverb unit is going bad or needs replaced in my NV400. As far as I know, it is all stock, chrome cornered amp. I have cleaned and reseated the reverb molex connector. I've also cleaned and lubed the pots using Funk-Out/DeOxit. I'm getting a sound that begins as a low level sound and slowly increases. If I turn the reverb all the way down it goes away. Then I can turn the reverb back up and it sounds ok for a bit then seems to come back slowly. I'm pretty sure I have the molex connector reseated properly, so I don;t believe that is it, but it could be, so I'll reseat it once more tonight.

-Chuck
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GFI U-12 Ultra Keyless, Carter Black U-12, both with Alumitones, and a sweet '70 Sho-Bud Permanent D-10, NV400 in Rick Johnson cabs, NV112, '73 Vibrosonic in Rick Johnson cabs, Hilton pedal, Steeler's Choice seat, Bessdang Gizmos from Dale Hansen, and a few other widgets and doodads.
I may not sound good, I just don't wanna sound bad.

Larry Bressington · From: Nebraska

Are you sure it isent 'mains' hum, move the amp around. It seems like the reverb units of today are worthless, replaced many, i gave up and now i run digital, problem solved and is much smoother.
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A.K.A Chappy.

Ernie Pollock · From: Mt Savage, Md USA

I remember a old Session 400 amp I had, fixed that reverb so many times and back then I think it cost me around $40 each fix. My wife, bless her heart, bought me an effects processor & I just turned that reverb off & have only ever used amp reverb in my Evans SE-150, My Nashville [with the LeMay Mods] works, but I never use that reverb either, or the reverb in my fender Steel King. I just got so used to that decent verb & delay, with no springs, it was a great way for me to go, and I never looked back at those ol reverb tanks again!!

I use my Nashville 400 at home, and always use my Evans playing out. On a rare occasion, I will take the Steel King, but due to the weight, it spends most all its time at home!!

Ernie Pollock
new email address mailto:shobud75@hotmail.com

Rick Johnson · From: Wheelwright, Ky USA

Chuck
I always keep a spare reverb tank
handy. Most likely that is the problem.

Rick

www.rickjohnsoncabs.com

Don McGregor · From: Memphis, Tennessee

When a reverb begins to go bad, you will first notice it is spending a lot more time in its room. Grades at school will begin to fall, and soon you will start getting notes sent home from the teacher about fights on the playground with other effects units.
It's a sad thing. I've been there.

Tom Wolverton · From: Carpinteria, CA

Good one, Don! I was going to post something similar. I recall a Gary Larson cartoon like that. Similar, sick minds think alike. : )
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To write with a broken pencil is pointless.

Tom Tobey · From: Florida, USA

Inside the reverb pan is a dampner of sorts. It keeps the springs from going in to total runaway when they begin to vibrate. The pan can be pulled our very easily. 4 screws and its out.
You can inspect the guts for any physical damage. It can also be replaced as a whole unit for about 100 dollars or so. I would find somebody who has any peavey amp and temporarily swap the pans and see if anything changes. If a different unit still fails in the same manner it is probably a defect on the circuit board. Usually an IC that drives the signal to and from the reverb pan. Both are easy fixes for a amp repair guy.

Chuck Snider R.I.P. · From: West Virginia, USA - Morgantown, WV

Thanks everyone!! Especially Don and Tom W., I'll be taking your advice first by trimming a switch off the tree in the back yard and just wear it out on that little dickens. Then we'll see if it wants to act up any more after that!!

I have another NV400 I can swap out the reverb tank with. Which I had planned to do, just wasn't sure if there was some other way to tell.

Hi Ernie!! I hope all is well with you! I saw your website wasn't up due to PC problems. Will you be setting it up again? I'm still playing the GFI, great guitar!! Still haven't moved to WV yet, but I may be up there for a bit this summer. If I can I'll see about getting together while I'm up there.

-Chuck
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GFI U-12 Ultra Keyless, Carter Black U-12, both with Alumitones, and a sweet '70 Sho-Bud Permanent D-10, NV400 in Rick Johnson cabs, NV112, '73 Vibrosonic in Rick Johnson cabs, Hilton pedal, Steeler's Choice seat, Bessdang Gizmos from Dale Hansen, and a few other widgets and doodads.
I may not sound good, I just don't wanna sound bad.

Tom Tobey · From: Florida, USA

I like the tree swithch method as well. I must admit it has worked for me a time or two.

Chuck Snider R.I.P. · From: West Virginia, USA - Morgantown, WV

Tonight I swapped out the suspect reverb tank with one I knew was working from another NV400. Looks like I'll be shopping for a reverb tank now. The hum/roar went away with the different tank.

Thanks to all for the help!!!

-Chuck
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GFI U-12 Ultra Keyless, Carter Black U-12, both with Alumitones, and a sweet '70 Sho-Bud Permanent D-10, NV400 in Rick Johnson cabs, NV112, '73 Vibrosonic in Rick Johnson cabs, Hilton pedal, Steeler's Choice seat, Bessdang Gizmos from Dale Hansen, and a few other widgets and doodads.
I may not sound good, I just don't wanna sound bad.

Ernie Pollock · From: Mt Savage, Md USA

Chuck: My website is now in the history books, that server went away & took it with him!! My computer knowledge would not allow me to make another one. Maybe if I lived another 70 or 80 years I would start to figure these dadburned things out. I am still here though, pickin' & grinnin'. My new email is address is: mailto:shobud75@hotmail.com

If you get up to WV this year, give me a holler & maybe we can get together.

Ernie Pollock Very Happy

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