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Field Kit 4 Channel Mixer Gain Mod? - Printable Version

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Field Kit 4 Channel Mixer Gain Mod? - uwood - 12-20-2024

Hello, I try to understand the gain stages of the 4 channel mixer of the field kit. 

Do I get it right, that U1 hast fixed gain of 1 (non-inverting buffer) and U2 has a fixed gain of 10 and U3 gain of 20?

The 100k RV-Gain pot only works as a voltage divider for the buffered input signal?

The input gain control with the pot does not work for one of my audio sources. Pot is to sensitive, I can only adjust from to quiet to already clipping. 

Can I get a "finer" gain control and less gain when I reduce the 1M resistor on U2 to 500k?

Thanks!

Schematics Link