[Elecraft] OT - Source for Air Variable Capacitors

[rich hurd WC3T]

I bought a Cardwell 500PF 3.5KV on eBay last year.  As a bonus I discovered
that it had a reduction drive when I opened the box.  :)

Not sure if it fits your requirements - it's pretty ratty looking, and was
obviously pulled from some electronic equipment.   I sort of resigned
myself to needing to 'spiff it up'.

Keep your eyes open on eBay, that's the best advice I can offer.

On Sat, Jun 16, 2018 at 8:05 PM Dauer, Edward <edauer at law.du.edu> wrote:

> With the tutelage of a friend I am putting together a mag loop but have
> had no luck finding a source of air variable capacitors up to the task.
> Vacuum variables aren’t hard to find, but the $200 and up price tag is
> offputting.  I have seen a couple of AVCs on E-bay that looked pretty
> ratty; and the commercial types for sale new look like low-power trimmers.
> Anyone know of a source --  or even have any they’d sell?  Specifically I
> would like a range of 6 to 120 pf or more, butterfly or split stator, with
> plate spacing sufficient to take a kilovolt of RF.  And ideally with
> reduction gear tuning though that’s optional.
>
> Thanks for any info anyone can provide . . .
>
> Ted, KN1CBR
>
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