Lin or Log?

[grooveshysta]

Hello,

Another new boy question!

I have just got this working with much help from you guys http://www.geofex.com/article_folders/eqs/paramet.htm

Thanks for your help so far. I am about to put it onto perf board and plan to use board mounted pots. I have used log pots on the breadboard but looking at other eq examples, it would apear that lin is used mostly. What would you advise??

Thank you!

[Earthscum]

For this EQ, I'd go with LIN so that it centers properly.

A LOG pot (100k for this example) is only 10k from all the way left to half way, and 90k for the other half of the rotation (or roughly therabouts). This is useful for volume, where the signal would be about 10x what you want to go to the next effect. Hard clipping to ground with 1N4148's is about 1.2V P-P, .1 of that is .12VP-P, which is more in line with what you fed the unit originally.

[teemuk]

Sometimes in mixing desks those also have "S" tapers (also known as "W taper"). Basically such have a linear taper around the middle of the dial and then the taper curves into logarithmic at both extremes of the dial. It sort of looks like an "S" when the function is drawn on paper.

[Earthscum]

Sometimes in mixing desks those also have "S" tapers (also known as "W taper").

+1

I've seen quite a few like that, as well. My DOD bass overdrive uses W tapers all the way through, oddly. In mixing desks it allows you a little more adjustment towards either end instead of just dealing with the rapid falloff or boost (I think it lets manufacturers get away with omitting limiting resistors at ether end of the pots, as well).