[sdiy] Vactrol VCF rev 2: help needed

[René Schmitz]

JH. wrote:
> Not that I would have done this already (no time ...), but I often think
> about using dual (center-tapped) vactrols like the VTL5C3/2 in a
> servo configuration, where you run DC on one half, and your
> signal on the other half. Then you should be able to build as many
> tracking Vactrols as you like. 
> Only constraint is that this will be very difficult if you don't have
> one end (the center tap) of the vactrol grounded.


Hmm, wouldn't the tracking of the two halves be the limiting factor 
here? I haven't measured any 5c3/2, but the center tapped LDRs I have 
aren't perfectly matched either.

Cheers,
  René

-- 
uzs159 at uni-bonn.de
http://www.uni-bonn.de/~uzs159