[Elecraft] OT - Source for Air Variable Capacitors

[K9MA]

I searched far and wide for high voltage air variables a year or so ago 
for a tuner.  I needed some quite specific values rated up to about 1 
kV.  The only place I could find them was Surplus Sales of Nebraska.  
They weren't cheap.

73,
Scott K9MA


On 6/16/2018 20:30, rich hurd WC3T wrote:
> 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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>

-- 
Scott  K9MA

k9ma at sdellington.us