AW: AW: Minimoog Vcf

[Haible Juergen]

	> A question, how did you solve the problem with the C type pot?

I *used* a C-type pot (;->).
I did only get one by chance, back then, but it's not so bad
anymore today. Last time I looked Farnell had a few in
their catalogue.

	>(if I understand well it is an inverted logarithmic, I only found
linear
	>or logarithmic pots. I did it with a stereo logarithmic pot using a
so
	>strange wiring that I cannot remember right now. It works correclty
but
	>does not reproduce the original sensitivity of the control, wich in
a
	>certain way
	>is not too bad)

I'm not a fan of this method. You will improove the behaviour for a
small region, but no way to get a smooth action for
the full range.
Better methods, if you don't have a reverse log pot:
(1) use a log slider pot and turn it upside down.
(2) use an ordinary log pot and connect it backward (ccw end
      position is max resonance). Relabel it as "damping" ...
(3) use an exponential VCA and a linear pot
(4) try to fif a shaft at the back of a log pot (reportedly works
      with the cheap plastic Piher types)

JH.