[sdiy] Any idea how Behringer Eurorack volume controls work?

[jhaible at debitel.net]

I think I have seen this circuit before (probably in a
Roland rack mixer), thought it was a brilliant solution,
but (here's the drawback) it used a special pot taper,
probably reverse log (?).

JH.




Zitat von Don Tillman <don at till.com>:

>    > From: Tom May <tom at tommay.net>
>    > Date: 09 Mar 2003 18:06:01 -0800
>    > 
>    > Big thanks to Don, too, for sussing out and explaining the advantages
>    > of the circuit, although I would have expected you to list the
>    > disadvantages, too, Don :-)
> 
> :-)
> 
> I actually tried, but I couldn't really find much in the way of
> disadvantages. 
> 
> Generally using a pot in unusual ways is bad form because it requires
> that you assume the pot is perfect, and of course it's not.
> Especially the connection between the wiper and the resistor element.
> 
> But here, if the connection between the wiper and the resistor element
> is intermittent the gain just snaps to 1.  That's not awful.
> 
>   -- Don
> 
> -- 
> Don Tillman
> Palo Alto, California, USA
> don at till.com
> http://www.till.com
> 
> 
> 




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