Where does the negative feedback attach to on a 50 watt amp?

[garysanders]

Cool,not trying to jack that thread but I am having the same problem.

I made an error on the last post.I have the 4.7/1uf/390 now and its way to dirty.At the high end of the pot it makes a quiet but very high pitched whistle.Like positive FB.I think Bob has explained this to me but it was some time ago.

Gary,
Try switching the wire from the resistor to the 8 ohm tap or 16 ohm tap to see what that gives you.
If that doesn't help, try a 6K2 resistor or a 8K2 one.

I can't remember what OT you are running, is it the stock Carvin OT?
And that is a 100 watt OT right?

Did you ever figure out what the primary impedance of that OT is?

I don't know the primary impedance,I'll find out.And yes it is the stock 100W Carvin OT.Thanks for the tips!

edit:(I'm also fooling with a pot instead of the 4.7k resistor.I have it sounding good on the 16R tap.I'll measure the pot and put a resistor in its place.(I saw that in another thread))