[sdiy] Mounting methods for air variable tuning caps ??

[John Marshall]

Dan,

I suspect that the variable capacitor originally had a large pulley pressed
on. Is the shaft splined? A knob with a small pulley would pull a cord that
turned the big pulley on the capacitor. Often there was pointer attached to
the cord that would move to display the frequency in Kilocycles.

You could make an adapter from the capacitor shaft diameter to 1/4 inch.

There are similar capacitors available with long 1/4 inch shafts.

John, WA7BSR
old radio guy

On Thu, Oct 8, 2015 at 3:40 PM, Dan Snazelle <subjectivity at hotmail.com>
wrote:

> I am working on a sdiyproject that uses an old fashioned variable
> capacitor (the kind with fins) to control an osc
>
> It does have a few holes to screw it into the bottom of a box
>
> BUT the shaft itself is not any sort of shaft I've worked with before AND
> the shaft is extremely short
>
> These are the three section type
>
> I figured maybe some of the fellow Ham sdiyers might be able to shed some
> light on mounting and creating longer shafts for these
>
> Many thanks for any advice
>
>
>
> Sent from my iPhone
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