Interference From Nashville 1000

Paul King · Post by **Paul King** » 7 Jul 2004 7:30 pm

The church just purchased a Nashville 1000. When I turned it on tonight we started getting interference which we found was from the cordless mic. We disconnected the cordless mic and the amp works like a champ. I never had any trouble with the Nashville 400 doing this. I am wondering if any Nashville 1000 owners have run into this problem and if so what did you do to solve the problem. I only worked with the amp for a few minutes but I believe I am really going to like this amp. The Boss DD3 sounds better to me with this than with the Nashville 400. Any help or info would certainly be appreciated.

John Floyd · Post by **John Floyd** » 8 Jul 2004 1:49 am

Check The Power Cable for the NV 1000 and make sure it is plugged in good on the Amplifier end.
Also Check rhe Power Outlet in The Church itself, Is it a 3 wire outlet and is the center Prong really grounded.

Sounds like a Grounding problem!

Blake Hawkins · Post by **Blake Hawkins** » 8 Jul 2004 3:44 am

Not a grounding problem.
The "switching regulator" in the power supply of the NV 1000 generates RF "hash" that can wipe out a wireless microphone on certain frequencies.
At one of our locations, the VHF microphone was replaced with a UHF one and that cured the problem.
Other solutions are to move the receiver for the wireless microphone as far away from the amp as possible and to make sure it is on a separate electrical feed.
If the receiver can't be moved, then mount the antenna at a location away from the
amp and run coax back to the receiver.
The NV400 does not have this problem because it uses a "linear" power supply and does not generate the RF noise.
Blake[This message was edited by Blake Hawkins on 08 July 2004 at 04:52 AM.]

John Floyd · Post by **John Floyd** » 8 Jul 2004 4:26 am

I've never heard of this, I have two Px-300's that I use with a rack setup and have a friend who uses one of the very first NV-100's along with a VHF wireless mike and He has never seen this problem either.

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John Floyd · Post by **John Floyd** » 8 Jul 2004 7:26 am

JUst received an email from Jack Stoner discussing this with me, I am reluctant to suggest this and a person should be very careful that no foreign metalic objects fell into the amplifier's electronics, but it could be a cheap fix, so here goes,,,

Back in times gone by, Fender and some other amp manufacturers used to staple a piece of metallic screen wire in the tops of the cabinets and when the electronics/Chassis was installed and tightened up with the 4 support bolts from the top of the cabinet, the screen wire was grounded from contact with the chassis and acted as a pretty good shield, Hence the term screening of an amp.

Of Course, they used an air driven stapler that really sunk the staples in the wood of the cabinet and them falling into the electronics wasn't much of a problem.

There is also aluminum foil that has an adhesive on one side that can be bought and this might also do a good job, Either material should serve to shield the interferring chassis in the NV-1000.

But I would check with Mike Brown at Peavey, before I did any of this. They may have a mod out already to address this problem
John[This message was edited by John Floyd on 08 July 2004 at 08:27 AM.]

Mike Brown · Post by **Mike Brown** » 10 Jul 2004 9:13 am

The 1000 does have a piece of metal secured to the underside of the cabinet to assist in shielding the digital amplifier section.

I suspect that it is interference between the digital power amp and the wireless product.

Paul King · Post by **Paul King** » 11 Jul 2004 1:21 pm

This morning we moved the wireless system across the stage behind the drummer. It solved the interference problem getting it away from the Nashville 1000 and everything else works as well. I am worried about going somewhere to play and running into the same problem. I suppose since I am not an electronics man that it could affect a wireless system on a guitar as well. I play once a month where the rhythm player uses a wireless system insted of using a mic for his guitar. If the Nashville causes interference with his system I will be stuck for the night and will have to take my Nashville 400 for those nights. Other than that problem this amp sounds pretty good. Like anything else it will take a little playing time to get used to the difference in sound. Thanks to all of you on this forum for your help and those who sent me personal emails.

Bill Llewellyn · Post by **Bill Llewellyn** » 11 Jul 2004 4:27 pm

I think some of the respondants here misunderstood Paul's original post. He wasn't saying interference from the N1000 was getting into the wireless mic, he was saying intereference from the wireless mic was getting into the N1000. Is that correct, Paul?

Paul King · Post by **Paul King** » 11 Jul 2004 6:58 pm

Bill, When I turned the amp on the interference started immediately. We disconnected the wireless mic and it stopped. I am not suggesting anything is wrong with the Nashville 1000 but I never had that happen before with the Nashville 400. We moved the receiver across the stage and all is well now. The amp sure sounded good tonight although I have to play a bit to get adjusted to the settings I want.

Mike Brown · Post by **Mike Brown** » 13 Jul 2004 5:36 am

I guess it is all in the way that you "word" it. Either way, this situation could happen with any other wireless and/or digital products that are in the same vicinity and are operating on close frequencies.

Ray Minich · Post by **Ray Minich** » 13 Jul 2004 6:41 am

Check your flourescent (SP?) light fixtures in the building. Put a PA in a church one time and the buzzing was annoying. Turned out a flourescent tube in the ceiling had a bad connection at the pins. Took a week to find.

Paul King · Post by **Paul King** » 13 Jul 2004 8:59 am

Mike, I am going to play Saturday evening with a guitar player who uses a wireless setup. He told me he had been around all kind of amps and equiptment and never had any problem. This incident may have been an isolated problem. Regardless of the problem this Nashville 1000 sounds very good to my ears.

Mike Brown · Post by **Mike Brown** » 13 Jul 2004 11:33 am

I use a NADY wireless for my six string guitar rig all of the time but I haven't run into any problems except in certain venues. You probably won't encounter problems all of the time, but you will in some situations.