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Topic: Help with Nashville 400 reverb issue????? |
Kenny Radas
From:
Edwardsville,IL,USA
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Posted 11 Jan 2012 8:14 am |
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| I am having a problem with the reverb on a Nashville 400. With the tank connected via the molex connector to the chassis the amp has a very sterile feel with a lot of mids. With the molex connector unplugged the amp comes back to life and has a great full bodied feel to the sound. When the reverb tank is connected the amp sounds like certain frequencies are missing and others are increased. This is with the reverb control turned to zero. Just having the tank connected screws with the tone of the amp in an unpleasant way. Has anyone run into this type of problem? Do I just need to replace the reverb tank or ship the amp and tank to Peavey and have them go over it? Thanks for your help. |
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Jim Palenscar
From:
Oceanside, Calif, USA
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Posted 11 Jan 2012 8:28 am
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| In my experience the most common problem relating to the the reverb in the 400 series of Peavey amplifiers is the solder joint from the molex connector to the board. I will usually remove the board and simply reheat the joint- applying solder if necessary. A bad joint can cause all manner of problems. |
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Clyde Mattocks
From:
Kinston, North Carolina, USA
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Posted 11 Jan 2012 8:33 am
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Sounds to me like the tank is going microphonic. If so, the only cure is replace the tank. Not very expensive.
_________________
LeGrande II, Nash. 112, Fender Twin Tone Master, Session 400, Harlow Dobro, R.Q.Jones Dobro |
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Jack Stoner
From:
Kansas City, MO
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Posted 11 Jan 2012 9:39 am
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My take as a former amp tech, without actually looking at the unit.
If you are having problems with the reverb control set to zero, it suggests a problem with the circuitry that feeds the signal to the reverb, which can also affect the internal circuity that is connected to the reverb circuitry. A "load" (the reverb tank) or no load (the tank disconnected) should have no affect.
This will take an amp tech to fix.
Last edited by Jack Stoner on 11 Jan 2012 10:43 am; edited 1 time in total |
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Todd Brown
From:
W. Columbia , South Carolina
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Posted 11 Jan 2012 9:55 am
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Kenny, sounds like the quickest, easiest fix would be to pull the reverb pan and go with an outboard reverb. Holy grail, maybe..
Jack is probably dead on with his assessment, you should probably get it looked at, though. |
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Kenny Radas
From:
Edwardsville,IL,USA
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Posted 11 Jan 2012 12:57 pm
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| Thanks for the help guys. I'm trying not to have to tear it down and ship it, but it will probably come to that. Will it hurt the amp further to run with the molex unplugged? I assume it won't. |
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Richard Sinkler
From:
aka: Rusty Strings -- Missoula, Montana
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Posted 11 Jan 2012 3:58 pm
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Actually, reverb pans are a lot cheaper than outboard reverb effects (at least the good ones). It might not hurt to change it out anyway.
_________________
Carter D10 8p/8k, Dekley S10 3p/4k C6 setup,Regal RD40 Dobro, Recording King Professional Dobro, NV400, NV112,Ibanez Gio guitar, Epiphone SG Special (open D slide guitar) . Playing for 54 years and still counting. |
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Todd Brown
From:
W. Columbia , South Carolina
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Posted 11 Jan 2012 4:36 pm
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Yeah, but going with what Jack said, which is highly likely, if it's affecting the signal only because it's hooked up. My advice to just pick up a Holy Grail would be a whole lot cheaper than sending it to Peavey, having them diagnose and fix the problem. Then return shipping, plus you need another amp if your a gigging player. Not to mention the time without the amp. And they might fix the problem with the reverb circuit and still tell you that the pan needs to be replaced. I think unplugging the reverb and buying a holy grail is a little cheaper than all that. 
BTW, good used ones can usually be had on ebay for $60-$80. That seems to be the logical option to me. JMHO |
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Kenny Radas
From:
Edwardsville,IL,USA
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Posted 11 Jan 2012 4:51 pm
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| I have an outboard reverb that I can use. I just want to make sure I'm not going to hurt the amp long term running without the molex for the reverb plugged in. The amp seems to work fine with it unplugged, but I lean toward what Jack said that there may be more going on than just the reverb. I also agree with Jack, the amp should sound the same with the reverb plugged in or unplugged if the reverb level is at zero. |
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Todd Brown
From:
W. Columbia , South Carolina
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Posted 11 Jan 2012 4:58 pm
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| Definitely should sound the same whether it's connected or not. So, you do have a problem somewhere with the reverb circuit. No, it won't hurt the amp to disconnect the reverb and run without it. Lots of people do that. If you're that worried about the amp, and really want that Peavey reverb, go ahead and send it in. I was just coming from a practical point of view as far as time and money is concerned. If you already have a reverb pedal, I would just run with it. Problem solved. |
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