MKC: gain 2 (clean) is counter clockwise to increase?

[Anonymous]

Hi, I am doing 2-knob-gain MKC and with the gain 1 (dirty) at zero, the gain 2 (clean) increases counter clockwise. I can switch wires on the pot, but I wanted to check if that is expected behaviour?

Another question: what should I socket to try adjust the bass boost switch? It is too much bass boost and I want to try tame it a bit.

I just finished soldering and the first thing to fix is that I didn’t have 22K resistors in the power section for R23 and R24, and used 20K instead. Which I only now measured and they are both reading 19.2K.This is likely why my voltages are all at least 0.5v low, and the pedal sounds fizzy with 9v supply:
3.9     4.0            IC2
4.1     4.1
4.1     4.3
0        9.1

3.8      4.1          IC1
3.8      4.1
3.1      4.2
0         9.1

 

 

 

[Anonymous]

[Anonymous]

Gutshots in prev post, some notes:

The 820p, 390p, and 390n are all combinations of capacitors to get those values,
also, the 1.5K and 15K resistors I didn’t have and used series combinations to get those values.
For the ICs, TL072 sold out at my local store, used LM1458 instead.

[Anonymous]

Reduce the value of C5 to reduce the amount of bass boost.  I’m not sure about the GAIN 2 pot rotation.

[Anonymous]

Thanks for the tip on C5! I’ll socket that one and try some values to tune it to my taste.

[Author]

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