ADA MP1 schematic question

[Caspercody]

Hello

Can you please look at the schematic I attached, and look at the circuit that I out a red square around. I am trying to identify what this circuit does. Is it a compressor, or distortion?

Thanks
Rob

[sluckey]

Can you please look at the schematic I attached, and look at the circuit that I out a red square around. I am trying to identify what this circuit does. Is it a compressor, or distortion?

Title block says distortion. I see no mention of compressor.

[PRR]

NE572 is a notorious telephone compandor.

That plan is too much for my brain. They *could* be companding the signal before/after distortion to get a more constant % distortion. But there's too much going on for me.

[shooter]

That plan is too much for my brain.

stop by one of those CCP operations in your backwoods, they'll sell ya the good stuff 


I'm to deep in other things to re-learn the Wheatstone bridge basics, seems like that diode bridge wants to act like one, maybe later

[Caspercody]

Thanks for looking!!

I believe that the circuit around U4 is the solid stat distortion circuit. This feeds in front of the tube distortion circuit.