Friedman Amp DIY (TYPE) rare noise problem!

[zarana]

(First sorry for my English, Iam from spain)

I am in an other Project.
this:



Well, the problem is, when I play with full gain I cant put the volumen more tan 11oclock,
A trebble noise scream apears and I can put the amp as loud that it can.

But when I put the gain at 9 I can putthe volumen at full.

What can I do?


THANKS

 

[jazbo8]

Can't really read the schematic, can you post a larger one. But based on what you describe, you may have oscillation problem.