[sdiy] pots with centre detent?

Dave Kendall davekendall at ntlworld.com
Sat Jun 23 10:42:14 CEST 2012


On Jun 23, 2012, at 02:39, Paul Perry wrote:

>> Using diodes to create a dead zone is at least as old as the arp 2600
>
> Indeed, it's one of thoseold  standards from the first days of analog 
> computers.
> Sometimes it is worth remembering that an analog synth is really just 
> a specialised analog computer - same parts, same construction, same 
> hassles!
>
> So far as centre detents go - in some applications it can be easier to 
> go with a centre detent tapped pot, because then you might have the 
> option arranging the circuit with the centre tap at ground.
> Still trying to think of a circuit where one would want a centre 
> detent log pot..

Boost and Cut for an EQ gain with a centre null point?

Got a rackmount parametric EQ that has exactly that, but looking 
inside, it uses a dual log 10K somehow to do the job.
I haven't got a schematic for it, but would be intrigued to find out 
how it might have been done - I guess it's likely to be another old 
trick.... ;-)

cheers,
Dave





>
> paul perry Melbourne Australia
>
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