Noise on channel B of my 2:Ninety

Triaxis, Quad Preamp, Stereo Power series, Recto Preamp

Moderators: Guitarzan, Grandor, ned

Post Reply
Gearbox
Bottle Rocket
Posts: 2
Joined: Sat Apr 26, 2014 12:40 pm

Noise on channel B of my 2:Ninety

Post by Gearbox » Sat Apr 26, 2014 1:18 pm

Hi, I am new to the forum and a boogie user for a few years now. I run a 50:50 power amp with my Axe Fx. A few weeks ago a got hold of a 2:Ninety simul class. Bought it from the first owner. It is from 1998 and a did put new tubes in from TAD. There was a crackling noise when I bought and I thought re-tubing would fix this. It did not. After checking everything it appears to be only on channel B. If the speaker cable is connected that is. And with the stand-by on, no noise when stand-by is off. I now use it as mono keeping the volume on channel B at minimum and no input connected. Sometimes the noise is gone for a moment and it comes back growing from almost nothing to very annoying.
A few questions
1. What could be the problem? I had contact with Mesa Boogie and they said it was most probably a bad resistor. Any other suggestions? I visually checked the circuit board and all is looking fine
2. Can I run the amp without the power tubes in channel B? The idea is not to have them running until I have the amp fixed.

Any help or idea is much appreciated!


PS I Have soundclip/video of the problem but can"t find a way to upload it... :?

pegleg51
Bottle Rocket
Posts: 2
Joined: Wed Apr 16, 2014 2:21 pm

Re: Noise on channel B of my 2:Ninety

Post by pegleg51 » Mon Apr 28, 2014 5:33 pm

Hi..Had what sounded exactly the same problem un a nomad.Would have bet anything it was a resistor.It was a bad input jack.

Gearbox
Bottle Rocket
Posts: 2
Joined: Sat Apr 26, 2014 12:40 pm

Re: Noise on channel B of my 2:Ninety

Post by Gearbox » Tue Apr 29, 2014 9:08 am

Thanks for the feedback. I will check the input jacks and see if it is causing the problem.

Corporal
Bottle Rocket
Posts: 16
Joined: Sat Aug 23, 2008 3:56 am
Location: Fields of Flanders

Re: Noise on channel B of my 2:Ninety

Post by Corporal » Mon Nov 21, 2016 3:36 pm

Any luck on that ?

Post Reply