[sdiy] Trimming an Oakley MultiMix

[Rhen, Kris]

> > However, for the reversible attenuator part, I want to use
> > center-detent pots for a nice clean zero.
>
> This is a simple circuit and works well for what it is. The need to trim
> your centre position may be considered a little over the top for such a
> circuit. After all you want complete silence from that channel you
> simply pull out the jack plug. :-)
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Thanks Tony, however, I'm using this in a matrix mixer configuration so I do
need as best cancellation I can manage on the other busses while all jacks
are in.
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> However, the way I would do would be to use say a 2K2 resistor at one
> end of the pot's track, and a 4K7 trimmer at the other end. The wiper of
> the pot is connected as shown on the schematic. But as John says this
> circuit is not going to give you perfect cancellation at all frequencies
> even when zeroed.
----------------------------
Thanks again sir!  Maybe a way to introduce a 'dead zone' near the center?
I'll do some research.  
KRIS
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