[Amps] trying to understand 1296 cavity amp

[jmltinc at aol.com]

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 at hotmail.com>
To: amps at 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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