Feedback loop

[Reimer]

Hey 5e3 builders

I was trying with a feedback loop on my 5e3 deuxe like fender did on the 6g2 model. But it does not work, it squiiiils like he.. when I connect the 56k resistor from the catode on the 2 gain state to the output.

Why is that.

Thanks

Glasstone

[Tom Phillips]

It appears that your feedback is positive. To make it negative just reverse your OT secondary leads OR reverse the OT primary leads. Whichever is easier. Then try hooking up the feedback loop again.
Good Luck,
Tom

[Bruce / Mission Amps]

Out of phase is right, reverse the two leads on lugs 3 of the power tubes.... but if you try to connect this 56K NFB lead to the cathode of the first 12AX7 triode, the NFB will not work.
The cap will bypass most of it to ground.

Bruce