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Ted FletcherTed Fletcher

Hi Doug,

There’s no variable presets on the P5; the discrepancy is most likely to be a degree of wear on the input and/or output pots. If the problem is purely during compression (this is not clear from your message) then this can be adjusted by very small adjustments of the LEDs, moving them closer or further away from the opto cells. The spacing is very critical.

If you would like to email me direct on ted@tfpro.com I will email back the circuit diagrams. :)