[Elecraft] OT - Source for Air Variable Capacitors

Walter Underwood wunder at wunderwood.org
Sat Jun 16 22:33:43 EDT 2018


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
> 
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to wunder at wunderwood.org



More information about the Elecraft mailing list