[Simple VCA]

[M.Ruberto]

hi,

i have successfully used an H11F3 FET opto-isolator as a simple VCA. it comes
in a 6 pin DIP package and the cost is resonable from most sources. be careful
selecting the LED resistors (shoot for around 6 ma).

i would send you a schematic but i don't have access to my home PC due to
being in Brazil on assignment.

btw: i've used these for audio VCAs but DC tests i've done seemed favorable
too. let me know how it goes if you try them.

-<mike>-


"Paul Maddox" <paul.maddox at ndirect.co.uk> wrote:
> Dear all,
> 
>   Im after a simple VCA, nothing fancy , 1 or 2 transistors/fets.
> 
>   Its to scale EGs under CV control, so no audio is involved..
> 
>   Suggestions? Ive tried lots of Transistor combinations but cant crack it.
> 
>   Paul
> 


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