Mesa Tremoverb Head Buzzing And Radio Noises

[Charvel1975]

Hello! Last night at our band's rehearsal place, my 95 Mesa T-Verb was getting loud buzzing noises, I don't know if it was 60 cycle hum but kinda sounded like it and noticed for the past couple months it's been getting worse with the buzzing noises on either channel whether or not the Reverb is turned on or off. My Tremoverb was converted from a combo to a head some years ago. It's currently got the stock 1995 Mesa labeled 5U4G's and the Mesa labeled 6L6's &12AX7's in it which are over 4-5 years old and a quad of JJ 6L6GC's I've had for some years but took the Mesa 6L6GC's out of the amp and put in the JJ's.

Also, there was some talk radio station coming through the amp only on the Red channel and my Marshall 1960 4x12 cab I have it plugged into?! It did this some years ago too but this is the first time in years it's done that! On my pedal board, what I have going through the effects loop is a ModTone clean boost and MXR Classic Chorus powered by a Visual Sound One Spot power supply. Currently has JJ 6L6GC's and Mesa preamp tubes. Any Tremoverb owners have this happen before and any suggestions??

 

[Inearthed]

Do things clean up / go away if you remove all pedals, unplug the effects loop, and run just guitar -> cable -> head -> speaker cable -> cab?

 

[ewill52]

plug straight in, remove anything in front or from the loop. If that clears it up, rule out the culprit through process of elimination. If that doesn't resolve it, I'd start with tubes.

 

[glpg80]

Solder a 0.01uF ceramic capacitor to the ground lug of the input jack. Solder the other end to the nearest chassis/earth ground.

 

[Charvel1975]

Well last night went over to the rehearsal place with a Furman SS6B 6 Plug Surge Protector I bought off Amazon. I tried just what I had the Mesa and the 1 spot power supply for the 2 pedals on my pedalboard plugged into the same store brand power strip, was getting that LOUD, what seems like 60 cycle hum, and then on the Red channel - that short wave radio station that came through the last time. I then unplugged the Mesa and 1 spot and then just plugged both straight into the wall outlet, same thing. Plugged the new Furman SS6B Surge Protector in and plugged the Mesa and 1 spot in it, same buzzing, LOUD 60 cycle hum and that same short wave radio station coming through on the Red channel only. Also, anytime you turn up the reverb on either channel the amp starts getting a lot of buzzing noise? Now if you turn the reverb knob off on both channels, the amount of buzzing somewhat gets quieter but the noise and radio station does NOT stop?
At this point, what should I do?

 

[Inearthed]

Do things clean up / go away if you remove all pedals, unplug the effects loop, and run just guitar -> cable -> head -> speaker cable -> cab?

Did you try this? What were the results?