Hello, i'd like to build a loop antenna , so i need a variable capacitor
(butterfly, split-stator or vacuum) with a resulting capacity of 500 pF and
about 5 Kv insulation...
The values are not critical, and i'll have to motorize this capacitor...

Anyone have something not too much expensive to sell?

Thanks,
Riccardo IK5WQO

http://www.qsl.net/ik5wqo