Ampeg "Guitaramp", 1956?

[vibrating string]

I did work out a good bit of the GuitarAmp circuit in sections. I see no negative feedback loop on the preamp or on the 6V6 power amp sections. There is no sign of the tube outputs feeding back to the grid inputs, which is how I imagine the negative feedback would appear. I have not removed the hardware again from the case to verify that, but I think my schematics would picked that up.

At this point, the amp sounds great and I am happy. It is not as quiet as my Gemini VI, but the hum is fairly minor and I love playing on it.

Thanks for the feedback! (No pun intended.)

Larry