TREMOVERB making quiet pulsating noise - PLEASE HELP

[vrtrooper]

On the Orange channel (more than Red) I'm getting a very quiet pulsating noise when I stoping playing. I've tried:

- new fuse
- disconnecting reverb
- tremolo controls are set to 0
- all different ground options
- different wall sockets


Suggestions ?!?!

 

[trendkill1168]

Turn off the tremolo switch for the orange channel right next to the speed/depth knobs. Make sure they are both in the down position.

 

[jbird]

Sounds like the tremolo is bleeding through! If you leave it switched out, does the pulsating increase/decrease when the modulation controls are adjusted? How does the switch feel?

 

[vrtrooper]

With all the tremolo switched off it still pulsates. The a actual tremolo controls have no effect on the pulse either, I always keep them at 0 anyways...



How is this fixed ?

 

[jbird]

Have you tried toggling between the Silicon Diode and Tube Rectifiers? Just a thought :idea:

 

[trendkill1168]

With all the tremolo switched off it still pulsates. The a actual tremolo controls have no effect on the pulse either, I always keep them at 0 anyways...



How is this fixed ?

Drag man, I thought maybe it was something simple.

 

[vrtrooper]

Someone was telling me today about 'LDRs' ?? Light detecting resistors used for channel switching ?



Had a similar problem and they had to have a tech replace those...



????

 

[Boogiebabies]

If it's an early TOV, it may need the tech update bulletin.
You have to check the value of 4 resistors. The early ones were known to eat LDR's.

It's listed at www.tubefreak.com under schematics for the TOV.