How to make a gain pot still have a set signal when at "zero"

Started by gmr1, October 05, 2009, 12:50:16 PM

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gmr1

This may be dependent on the circuit, but I have a drive pot, cw and mid lugs connected to the board, ccw to ground.

It's an OD (vol. and drive), but when you set the drive to a low setting it makes for a nice clean boost (using the vol. to set level). is there a way to make the drive pot when turned all the way down to act as it does when it's turned on a bit (so I can just zero the pot, and have it be the clean setting)? I tired adding resistance between lugs, but I'm not having any luck.

I'm likely not explaining this well, but any insight would be appreciated.

- greg


JKowalski

Add resistance between the pot CCW lug and ground.

You might want to keep the impedance the same, so try and match the total resistance through the pot and the resistor to the original pot's value. If you aren't adding much resistance, though, it shouldn't make much difference.

kurtlives

You should be able to add resistance from the lug going to ground. So generally a resistor from lug 1 to ground.

edit: beat..
My DIY site:
www.pdfelectronics.com

gmr1

I don't know why that is the one thing I didn't try...Thanks guys!