[Collins] 32S3 mic/gain control, replacement of

[Dr. Gerald N. Johnson]

On Mon, 2007-03-12 at 12:12 -0700, C E wrote:
> Fortunately, or unfortunately (depending on how you
> look), $urplu$ $ale$ of Nebra$ka $ell$ the$e unit$ but
> it might be for the KWM-2 $erie$. Try them out and $ee
> if it work$ for you.
> 
> Cal, N6KYR/8
> Here'$ the link:
> http://www.surplussales.com/Collins/CollKWM2.html
> 
> 
> --- w9hak <w9hak at insightbb.com> wrote:
> 
> > I have been looking for the mic/gain pot, Collins
> > p/n 376-2648-00, for 
> > my 32S3.
> > Cleaning from time to time helps, but the day is
> > coming when that won't 
> > help.
> > 
> > Thanks,
> > 
> > Smith Bradford
> > W9HAK
> >
> _
With that being a dual pot with wildly different values on the two
sections and with a switch that closes at max CCW, its ODD. It might be
possible to make it. Starting with something like Mouser catalog number
31VM303-F for a rear section with SPDT switch and a Mouser 31VW505F or
313-2420F-500K (linear or audio taper) dual ganged pot and replace the
rear section with that one with a switch. Even that set is going to fit
poorly because while the shaft is 1/4", the bushing is 8mm, not quite
5/16", a loose rattle in the original 3/8" hole. Years ago, one could by
a pot as a kit, picking bushing, shaft, sections, and switch
independently. I don't know of any way to do that today.

-- 
73, Jerry, K0CQ, Technical Advisor to the CRA
All content copyright Dr. Gerald N. Johnson, electrical engineer