Re: [sdiy] Adding offset to vactrol??

Antti Huovilainen ajhuovil at cc.hut.fi
Wed Jun 4 22:52:09 CEST 2008


On Wed, 4 Jun 2008, rdrake wrote:

> google for the data sheets for any vactrol; neither the response curve 
> nor the current-to-reistance curves are linear on any of those commonly 
> used for sdiy.

The signal path itself is still linear, isn't it? (for constant control 
current). If so, then there can't be any significant frequency dependency 
of the gain (and hence multiband VCA would be completely wrong approach).

Antti

"No boom today. Boom tomorrow. There's always a boom tomorrow"
   -- Lt. Cmdr. Ivanova



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