In a message dated 2/16/2008 2:20:16 P.M. Eastern Standard Time,
aa6eg@hotmail.com writes:
Folks,
I was looking closely at the mechanical marvel that is a Jennings Vacuum
variable capacitor.
I am wondering about whether the copper bellows arrangement that allows
extension and
contraction of the "rotor" have a finite number of cycles back and forth
before they are likely
to fatigue crack at the folds of the copper.
The Jennings PV4-500 is listed as having over 2.5 million life cycles.
73 Todd WD4NGG
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