[Elecraft] OT - Source for Air Variable Capacitors

[K9MA]

Actually, MFJ has lots of air variables, but they're not easy to find on 
their web site.  Search on "air capacitors".

73,
Scott K9MA

On 6/16/2018 21:33, Walter Underwood wrote:
> MFJ sells butterfly capacitors. They are rated at 1.5 kV.
>
> 12-67 pF http://www.mfjenterprises.com/Product.php?productid=MFJ-19
>
> 18-136 pF https://www.mfjenterprises.com/Product.php?productid=MFJ-23
>
> wunder
> K6WRU
> Walter Underwood
> CM87wj
> http://observer.wunderwood.org/ (my blog)
>
>> On Jun 16, 2018, at 5:05 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