Gary,
Although the anode connection (fingerstock of the anode by-pass plate) is on
the outside of the cavity, the tuned circuit is the inside of the cavity. Due
to skin effect, RF cannot not pass through the walls of the cavity (or through
the cross section of the fingerstock).
As the outside of the cavity is not a tuned circuit; a large, coherent
(in-phase) RF signal cannot develop on the anode by-pass plate nor the anode
cooler, and both are essentially at DC potential.
-John, N9RF
-----Original Message-----
From: Gary Patterson <gpatterson53@hotmail.com>
To: amps@contesting.com
Sent: Fri, Nov 20, 2009 9:48 am
Subject: [Amps] trying to understand 1296 cavity amp
I have a n6ca 2c39 1296 cavity amp and have trouble understanding how it
works.
he 2c39 plate has a large teflon sheet capacitor to ground. I dont understand
ow any rf gets into the cavity when the plate is dead shorted with this
apacitor. any help?
gary
w4af
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