Mesa Nomad Huge Hum - Jemsite
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post #1 of 4 (permalink) Old 02-05-2004, 10:37 PM Thread Starter
Join Date: Jul 2001
Location: Bangor, WA
Posts: 644
Mesa Nomad Huge Hum

Okay, I just got my new Mesa Nomad today...sounds AMAZING, very versatile, and an incredible clean channel. Channel 3 is excellent for rhythm, and I am still working on a great lead sound from Channel 2..

Anyway, on to my question/problem:

When turning the master volume on either Channel 2 or 3 up past 9 o'clock, I get a SUPER loud hum. Even when the master volume (output) is all the way down, there is a ton of hum still present. That is with the guitar volume and the output all the way down. Any suggestions? I think it might be a bad preamp tube, but I'm not sure.

We basically for tonight turned the master volumes for each channel down to about 3 and cranked the output...sounded VERY sweet, but you could smell the tubes cooking...and I don't want to have to replace tubes constantly, so I was wondering if anyone had a suggestion on how to take care of this hum problem?
trouble311 is offline  
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post #2 of 4 (permalink) Old 02-06-2004, 06:51 PM
Join Date: Nov 2001
Posts: 551
I think alot of people forget when dealing with high gain amps exactly what high gain means. High gain causes the amp to become very sensative and power cables, efen R.F can have an effect on it. Have you got flurecent lights in the room your playing in? or lights on a dimmer switch, because they can be killers.

It is important to remember that no amp is totally quiet on high gain settings. I have a nomad and i have a gate in the loop to stop hiss etc when im not playing.


Al M
Al M is offline  
post #3 of 4 (permalink) Old 02-07-2004, 07:40 PM
Join Date: Mar 2001
Location: Va Beach, VA
Posts: 1,416
Start swapping out tubes, man...that doesn't sound normal at all. Which nomad do you have? If it's a 45, check and see if you get the same results when you switch the power amp between normal and extreme.
Gresh is offline  
post #4 of 4 (permalink) Old 02-08-2004, 06:35 AM
Join Date: Dec 2003
Posts: 395
Have you tried your guitar througha different amp???? Maybe its not shielded very well???

If that fails check around for flurecent lights and other stuff. I would use a mains checker as well to see if its the mains you are plugging into. Also are you using cheap cables???

If all that fails try chaging the tubes to high quality items , if its still there take it back to the shop!!!!

power freak is offline  

high gain amp , mesa nomad , power amp , preamp tube

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