[sdiy] backwards pots. Whats the deal?

[Donald Tillman]

> On Apr 1, 2015, at 2:38 PM, Tom Wiltshire <tom at electricdruid.net> wrote:
> 
> Ok, I'm convinced too. So why isn't this more widespread, if it's not actually a new idea? Most mixer circuits you see ae the "classic" design. If there's an already existing "improved" design, why isn't it more widely adopted?


Certainly the forward potentiometer, and the equivalent resistor divider, are the very symbols of padding down a signal, so it's not surprising that would be the go-to approach.

The backwards potentiometer requires rethinking the fundamentals.  Which is something I do regularly.  And something Rickenbacker and Fender did designing instruments in the late 50's.

Perhaps we'll see it used more now.

Anybody know of any other examples of designs with backwards pots?  I wonder what the earliest example would be.

  -- Don

--
Don Tillman
Palo Alto, California
don at till.com
http://www.till.com