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 <[email protected]> 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
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