The Steel Guitar Forum

HI MIKE,
can you help me date my nashville 400?
the tag has the following numbers
SN#10439158
MFG LOC 04
00300300 JJC17
thanks for any hep you can give me.
also does this amp need any mods to update it?
thanks for any help you can provide

Mike i forgot to include this question, when i got my nv400 the guy had a jumper on the back pannel from the preamp out to the amp in sockets. he said that he was told to do this to bypass a part of the electronics that was pron to failure.
have you heard of anything about this????
thanks

Hello Curtis,
Thanks for inquring. Your amplifier has the Peavey tone mod installed that was included from the factory. Right now I am at home so I cannot research the year that your amp was manufactured, but from the number it looks to be a late '90's model. Production discontinued on the 400 in 1999.

Also, I guess that you are referring to the power amp in jack. Like any mechanical part, rust, corrosion or any other substance can form on the metal causing poor contact between the input plug and the jack contact. It is good for any musician to periodically lubricate the moving/mechanical parts to ensure reliability. I highly recommend Peavey Funk Out or Cramolin R5 which are both cleaner/lubricants.

Every amp manufacturer uses mechanical parts(pots, switching jacks, etc.. A switching jack is only "prone to failure" if it is not "maintained". Occasional maintenance is required on any part.

Hope that this helps.

Mike Brown

Hellow Mike,
thanks for the reply.
my other question was this,at the back of the amp on the right side there are three jacks, the past owner had a jumper from the preamp jack to the power amp jack.
he said this was to bypass a part of the electronics to improve the reliability of the amp. have you ever heard of this?ive tried it with the jumper and without and cant hear any change in sound quality.
the amp seems to be working good exept two of the pots are a little harder to turn than the rest.

thanks for your help,
curtis b.

TTT

TTT

TTT

Curtis, that jumper you mention is the same thing I did with mine until I cleaned the jac that Mike said should be cleaned. Mine would cut in and out sometimes and that was the culprit. There may be an easier way to do it but I took out the chasis and sprayed some contact cleaner where the contact points on the jac make contact. After that I didn't need the jumper any longer.

Regards,
Geo

Curtis, when a shielded jumper cable is connected between the preamp out and returned into the power amp in jack, this does the exact same thing as having no cable connected between these two jacks. The power amp in is a switching type of jack, meaning that connection is made internally via switching contacts. When no cable is inserted into a switching jack(power amp in), the metal contacts inside make the connection. When you patch from the preamp out to the power amp in, the "cable" is making the connection instead of the internal metal contact. To remove any doubt that the jack is switching properly, simply connect a cable between these to jacks and it bypasses the possibility of a dirty or contaminated jack contact.

Note; The pre amp out is not a switching jack.

Mike, I hate to but in here, but will this Peavey Funk Out Or Cramolin R5 penetrate the control knobs(Volume,Highs,Mid, etc.) enough to clean up a "crackling" sound?

Yes, you can use the above for lubricating and cleaning pots as well. These are "cleaner/lubricants" and not just a cleaner.

Thanks, very much!