Triple Rectifier - Bad Tube? Need help please!

[Anthony1967]

Ok:

This just started today out of nowhere-- there is a static type noise on my triple rec -even without the guitar plugged into the input.
--could be a bad tube.

I guess it's a preamp tube-- so what's the best way to proceed here?

Do I swap out each tube starting with V1 until I find the culprit?


I got the tubes from Doug's Tubes not too long ago --maybe back in April or May-- is this a common problem-- kinda shocked being that the tube is fairly new!

Any help here would be great!

Anthony1967
:evil:

 

[Platypus]

Actually, newer tubes that fail are fairly common.

I would use the tube diagnostic chapter in the manual (either paper or the one online). It gives a really good description of what you should do.

 

[Memorium]

I've found lightly tapping the different tubes with the grip side of a tooth brush will give show you where the troublesome tube is. Not sure if that is the right way of doing it, but it worked for me. Use at your own risk though.

 

[NoGlassNoClass]

Yep...or a pencil, a chopstick, something similar and non-conductive.