[sdiy] CV inputs with bipolar "amount" knobs

[Tom Arnold]

On Tue, Jul 27, 2010 at 02:04:27PM -0400, Harry Bissell wrote:
> Mouser shows a number of them in their catalog, most are PCB mount. Some are non-stock...
> I know that Alpha will make them for some minimum order. I'm not sure but probably
> 500pcs. I went in on a batch some years ago...


I still have a very few left...  50k linear


> ----- Original Message -----
> From: Tom Wiltshire <tom at electricdruid.net>
> To: Harry Bissell <harrybissell at wowway.com>
> Cc: David G. Dixon <dixon at interchange.ubc.ca>, Synth-diy at dropmix.xs4all.nl
> Sent: Tue, 27 Jul 2010 13:47:51 -0400 (EDT)
> Subject: Re: [sdiy] CV inputs with bipolar "amount" knobs
> 
> I think I probably agree with you as to the superiority of the centre-tapped pot, but they're hard to find. Do you know a good supplier?
> 
> Thanks,
> Tom
> 
> On 27 Jul 2010, at 16:35, Harry Bissell wrote:
> 
> > If its a CV input from a slow moving voltage (KBD, ENV etc) it would be fine
> > but if its audio rate modulation, you may find it difficult to get the null point.
> > 
> > It also depends on use. For noodling in the studio, a fidgety knob is fine. For
> > live performance, it needs to be rock solid (at zero) imho.
> > 
> > I really prefer the center-tapped pot with the center grounded. That works from
> > DC to any reasonable frequency, and the center detent is usually aligned
> > with the tap (the tap is mechanically wide...)
> > 
> > H^) harry
> 
> 
> -- 
> Harry Bissell & Nora Abdullah 4eva
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