Boogie Mark I reverb hum fixed

[jedmon01]

This may not be relevent to all Boogie owners as my Boogie had a new Ruby tank fitted so is not stock.
As with other posts the hum increases as the reverb level is increased.
Rather than go down the route of checking the amp I simply removed the tank, extended the phono leads
and moved it a few feet from the amp. Complete silence even with the reverb on 10.
So it is, as suggested by Mesa, pickup from amp to tank.

As the input to the tank was at the mains transformer end, I decided to turn the tank through 180deg before
putting it back in. The leads then came out of the right hand side, up over the speaker magnet which I
secured with a cable tie.
The amp still hums but with the reverb on "5" it's hardly noticable.

I have no idea how stock Mark I Boogies are wired, but it worked for me
John

 

[dgr888]

I posted this fix for The Mark series and possibly other Mesa's that have this problem in 2009. I have been doing this mod since the 80's for guys and they always were told and thought that the noise was just the way it is with these amps. It's simply not the case as Boogie put the tanks in backwards from the factory and never admitted to it... I know it works and makes the amps much more quiet and usable especially in the studio. Please put your findings on my original post so we can get this fix out to everyone.
dgr888

 

[jedmon01]

That's reassuring that the fix has already been posted.
I did quite a bit of serarching but must have missed your original post.
And yes. the mod certainly works and only take 5 minutes to implement.
Cheers
John