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Post new topic Need a tech to check out my NV400
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Author Topic:  Need a tech to check out my NV400
Tim Harr

Dunlap, Illinois
Post  Posted 29 Jan 2019 11:05 am    
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Hi guys -

Pulled out a NV 400 of mine and was surprised to hear that there is a a distortion that shouldn't be there. A low end, airy thud type distortion. Was first thinking it might be the speaker... the reverb tank has been removed.
I have troubleshooted this thing and have deducted that it is the pre-amp section. I connected another pre-amp to the power amp in on the NV400. Sounds normal.

There are no mods..it is 100% stock.

Either way, I would like to have someone go through it and give it some tech bench love.

Ideally, I would send you the amp itself and leave the cab and speaker here.

Any suggestions on who is the best at this?

Tim Harr
Mullen G2 D-10 (9/5)

Retired US Army Band (Pedal Steel/Dobro/Guitar)
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Richard Sinkler

aka: Rusty Strings -- Oakdale, California
Post  Posted 29 Jan 2019 11:33 am    
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Send it to Peavey. They are reasonable and quick. Only need to send chassis and reverb spring. Even though you don't use the spring, send it anyway.
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Pat Moore

Virginia USA
Post  Posted 30 Jan 2019 3:04 am    
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Yep, Peavey! Best bet!
Emmons D10 SKH, Emmons D10 PP, Emmons STR10 lacquer PP
Quilter Steelaire, Peavey Amps, Dodd Princeton Amp
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Bill Ferguson

Molino, FL USA
Post  Posted 30 Jan 2019 4:46 am    
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Yes, send it to Peavey. Call Mike Brown first and he will arrange "priority" repair.

More than likely it is just a dirty switching jack.

Have you tried using a short patch cable and connecting (on the back of the amp) a cord from the PreAmp out to the Power Amp in. This bypasses the switching jack and if it works, just leave the cable there. Won't hurt a thing.

Also, try plugging your cable from your volume pedal to the amp into the PreEQ Patch IN and see if that helps.

If either one of these work, you can continue to use your amp that way.

If they don't then you probably should send it in.
Take the chassis out and pack it carefully in a Heavy Guage Box, with lots of cushion around the chassis.

Send to:
Peavey Service Center
Attn: Mike Brown
710 A Street
Meridian, MS 39301

Be sure and include a note stating the problem you are having.

Hope this helps
AUTHORIZED GeorgeL's, Goodrich, Telonics, BJS and Peavey Dealer: 1993 Green Emmons D-10 LeGrande w/ Emmons 108 pickups, 2004 Mahogany Carter D-10 w/ Lawrence XR16 pickups, Goodrich OMNI or Telonics Volume Pedal, George L's Cable & Strings, Peavey Nashville 112, Peavey Session 115 (#1) and a Telonics Combo 112
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Mike Brown

Meridian, Mississippi USA
Post  Posted 30 Jan 2019 9:12 am     Peavey Service Center
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Better yet, I highly suggest that you purchase a can of Peavey Funk Out FIRST! Then spray each input and output jack. Insert a 1/4" plug into each about ten to 15 times and then check for proper operation of the amplifier.
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Jerry Erickson

Atlanta,IL 61723
Post  Posted 1 Feb 2019 8:46 pm    
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Plug a cable into fx send and return jacks and see if the amp sounds normal again. IIRC, there are jacks on the front as well. Do them one at a time.
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