[sdiy] vactrol?

[harrybissell]

You can use the dual ones for controlling state variable filters (with separate

elements) or for Pi attenuators (with a center-tap element).   The Pi
attenuator
uses both elements against a fixed resistance... you can get quite a large
attenuation
range that way.

H^) harry

WeAreAs1 at aol.com wrote:

> In a message dated 8/20/05 6:57:47 PM, harrybissell at prodigy.net writes:
>
> << You can't use the dual element vactrols, they share the same LED so they
> will
> not go opposite directions as you would wish.
>  >>
>
> Yeah, I knew that.  I thought they had special ones with two separate LED's
> that were wired like 3-terminal pots.  I know, it doesn't make sense.