Hey folks,

Thanks for all the extremely helpful replies.

So, if we call the pot resistance between pins 2 and 3 on the pot R1, and let's call the remaining resistance (from pin 2 to pin 1) of the pot R2, then you have the equation for the overall resistance as R = R1 + 1/(1/R2 +1/100k). For 0% rotation, the resistance R = 0 + 1/(1/1M +1/100k), and so on for 10% rotation where R = 100k +1/(1/900k +1/100k), then similarly for 20% rotation, etc all the way up to 100% rotation, where R = 1M (the 100k resistor is completely shorted out by the pot wiper at this point). Try different resistors instead of the 100k that I used, and you may be delighted.

Ah, yes, obviously, thanks Lucifer.

So unless you reversed the wiring, you are interested in the higher resistance range. A log pot will spread this section out over more of the sweep like you want. You could also dial the pot to the maximum setting that you would ever use and measure the resistance between pins 2 and 3. Then replace the pot with a series resistor of that value and a pot of 1M minus that value.

Yes, I had actually reversed the wiring because it seemed more natural to me at the time. That's a nice suggestion actually, I'm gonna measure it to help me find the correct log pot to use.

Why don't you want to use a log pot?

I can actually get Log pots easy enough. I'm treating every build I'm doing as a learning experience and I got sucked down the modifying potentiometers rabbit hole a bit, and I was really interested to see if I could make the series log pot from a linear.

I've built the MFOS Weird Sound Generator before, and yes, that filter is cramped, but it is also a very simple active filter... that is the topology of the circuit severely limits what you can expect from it.

I've had several questions for MFOS mods, and I've also just emailed Ray directly through the website.

He always responded to me, including schematics with modifications drawn in. I think he would be very happy to hear out your question.

Thanks for the suggestion, I think ill do that.

cheers,

ff