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[RFI] Choke questions

To: "rfi@contesting.com" <rfi@contesting.com>
Subject: [RFI] Choke questions
From: Andy KU7T <ku7t@ku7t.org>
Date: Tue, 21 Jan 2020 15:28:18 +0000
List-post: <mailto:rfi@contesting.com>
Hi,
these may dumb questions (I am a choke newbee, but working myself up to the 
skillset to build my own to specific needs)...

A recommended method and material to use is #31 and a #12 THHN pair of wire 
(non-twisted). Since these are un-shielded wires, wouldn't this cause 
additional RF exposed where we do not need it?  Or does the field cancel 
because of the closeness of the pair of wires?

I would also have the opportunity to use thinner coax of the right impedance to 
make a choke. Why is the THHN wire better than coax?

Thanks and 73
Andy
KU7T
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