Nash 400 cutting out

John Knight · Post by **John Knight** » 10 Mar 2006 11:23 am

This problem drives you nuts. Intermitten cuts in sound. Is this part of the molex connector problem with the reverb?

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D 10 Thomas with 8&6, '61'D-10 Sho-Bud 8&3
S12 Knight 6&4
Nashville 400 and Profex II
81' Fender Twin JBL's
Asleep at the Steel

George McLellan · Post by **George McLellan** » 10 Mar 2006 11:51 am

John, mine did the same thing and Mike Brown told me to use a jumper from the two jacs in the back of the amp. That solved the problem. Apparantly the points on one of the jacs (I've forgotten which one it is) corrodes a little and that's what causes it. Give it a try.

Geo

Jack Stoner · Post by **Jack Stoner** » 10 Mar 2006 3:04 pm

There are two jack points that could potentially cause problems. The input/return jack for the Effects loop and the Power Amp in jack on the rear. These two jacks have a "normal through" contact so that, for example the preamp out to power amp in connection is made through the "normal through" When you plug in a jack from a preamp or whatever that you want to run direct to the Power amp then the Nashville 400's preamp is disconnected from the circuit.

Run a jumper cable (guitar cable) from the Effects loop out/send to the Effects loop in/return and see if that is causing the problem. If not, try the preamp out/power amp in as previously suggested.

If that doesn't do it, then there is something else internally. A band "Molex" connector for the reverb will not cause the entire amp to cut in and out.

ADDED: One other issue. If you have one of the older Nashville 400's that still has the molex connector for the speaker connections, remove the Molex connector and solder the speaker wires directly to the Molex pins. This was an Engineering Change that Peavey did on the amps and from talking to Mike Brown this should be done to older amps that still have the Molex connector.<font size="1" color="#8e236b"><p align="center">[This message was edited by Jack Stoner on 10 March 2006 at 03:05 PM.]</p></FONT>

John Knight · Post by **John Knight** » 10 Mar 2006 4:12 pm

Thanks guys, I will give it a shot

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D 10 Thomas with 8&6, '61'D-10 Sho-Bud 8&3
S12 Knight 6&4
Nashville 400 and Profex II
81' Fender Twin JBL's
Asleep at the Steel

Blake Hawkins · Post by **Blake Hawkins** » 11 Mar 2006 8:24 am

To help prevent a recurrence of the problem,
it's a good idea to "exercise" the jacks mentioned by Jack Stoner.
Every few months just insert and remove a plug a few times.
This moves the switch contacts and helps to prevent them from getting dirty.
I do it about every three months or so.

Blake

LARRY COLE · Post by **LARRY COLE** » 11 Mar 2006 3:14 pm

I changed the power amp in jack on the back to a Switchcraft jack and haven't had a problem since. The plating on Switchcraft brand connectors does not corrode or tarnish like other brands.

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Playing For JESUS,LC. WILLIAMS U12,SHO-BUD PRO1,CARVIN TL60,GIBSON LES PAUL CUSTOM,YAMAHA L-10A ACOUSTIC,ROLAND JW-50 KEYBOARD,G&L AND BC RICH BASS'S

James Quackenbush · Post by **James Quackenbush** » 11 Mar 2006 4:16 pm

This is a common problem with effects loops if they're not used very often ....It's not just with Peavey .....Jim

Mike Brown · Post by **Mike Brown** » 13 Mar 2006 6:59 pm

John, call me toll free tomorrow or at your convenience and I will be glad to assist you. Maybe we can figure it out by phone and take the appropriate action. My phone number is 1-877-732-8391, ext. 1180 and I am in the office from 8am to 5pm CST the remainder of the week. I look forward to your call.

Mike Brown
Peavey Electronics Corporation