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[Amps] 3CX800 stray C to chassis?

To: amps@contesting.com
Subject: [Amps] 3CX800 stray C to chassis?
From: Conrad PA5Y <g0ruz@g0ruz.com>
Date: Tue, 22 Aug 2017 08:56:08 +0100
List-post: <mailto:amps@contesting.com>
As I do not (yet) own a decent LCR meter does anyone have a decent ball park figure for the stray C to chassis for a 3CX800A7? The side walls are 1.25 inches away from the tube and the lid is 2.5 inches above.

Also thanks for all the help with my previous questions. I should mention that this is a retrofit to an existing 2m amp and C1 is 6pF maximum and I would like to use this part if at all possible.

I have a design that works on paper for strays C of 4pF with a Q of 8 using an L-Pi-L configuration as recommended by a few of you. The 4pF stray value does not seem unreasonable but it is a guess. I am sure that someone must have measured this.

Regards

Conrad PA5Y
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