An Intermittent Hum...Damn!

[dank]

I have had my Mark V for awhile, and all has been good. Last Thursday, I was in the studio for rehearsal. After about an hour, a background hum started. It inceases and decreases with the Output knob. None of the knobs or sliders are dimed. I am playing at a moderately low level-we are not heavy metal headbangers.

Any immediate thoughts come to mind before I call Mesa? Fortunatley, the gentleman who services all of my amps is an authorized repair center for Mesa.

Dan

 

[nicoroy123]

If nothing is connected to the amp, I mean no guitars, no cables or anything in the loop, do you still have the hum if you raise the volume?
(Please leave the speaker/cab connected while you make the test. Just in case... :shock: )

 

[Anonymous]

try different outlets in the studio.. sometimes is pure electrical interference, also make sure your Mark V footswitch is not close to any power supply!!! ( as soon as i added the footswitch to my pedalboard, i was getting some extra hum and for a while i couldn't figure out what was the problem until i move the footswicth away from the power supply!!!!)

good luck :wink:

 

[dank]

Thanks for the suggestions, guys. Unfortunately, the amp is in the studio. I won't be back in there until Thursday night. I'll give your suggestions a whirl then.

 

[rabies]

use a Monster Power center 2500 or similar.

 

[dank]

use a Monster Power center 2500 or similar.

I use Furman Pro Factors in the studio and on stage.

 

[pokerrules47]

I concur with the power conditioning idea, I am a metal head that plays in a classic rock band, we do a lot of songs that require various amounts of gain, and a lot of songs that don't. I am running my roadster a lot quieter than I normally would, but I find that depending on where I plug it in, I can get hum, which increases with the output control.

You can almost NEVER blame the amp when those types of hum occur. However, If it hums from every outlet in your house and your neighbor's house, and your rehearsal hall, and with a power conditioner, then you probably have an issue.

 

[dank]

Yeah, I'm going to try to isolate the issue when I get to the studio tomorrow night. In over 40 years of playing and owning amps, including several Mesa Boogies, I have never had an amp issue (knock wood). I'm probably one of the few.

 

[MesaGod666]

USE A POWER CONDITIONER!

That should solve your problem.

 

[Daxman73]

I personally use a Furman Voltage Regulator...I use it in every application (studio and stage)...To me, this is the best way to go because even power conditioners are still vulnerable to poor power from an outlet...A regulator takes the power from the outlet and automatically converts it to a constant voltage...We all know that a tube amp runs better and more efficient when the voltage is at a proper level and constant...It also conditions it as well...They are expensive, but worth every penny...

Could there be any tube issues possibly?