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[RFI] FW: Common mode choke on 4 Square feedlines without skewing phasin

To: "'Rfi List'" <rfi@contesting.com>
Subject: [RFI] FW: Common mode choke on 4 Square feedlines without skewing phasing?
From: "Paul Christensen" <pchristensen@ieee.org>
Date: Tue, 29 Jan 2019 15:55:57 -0500
List-post: <mailto:rfi@contesting.com>
>Can you think of any negative aspects of doing it this way over making up
some RG400 chokes?

Don't rule out surplus RG-303.  It's not too common but it can be found with
some searching.  RG-303 is similar in construction and power handling to
RG-142/RG-400 but with a slightly smaller diameter that makes winding
easier.  Surplus cost is about USD $1.35 ft.  It works well for chokes where
ends are flared out and soldered but I don't recall if there's a common
soldered or crimped connector that works with its smaller jacket diameter.
As a point of reference, Alpha used RG-303 in some of its amplifiers.   

I've been using RG-400 for inside shack cabling long before it became
popular -- back in the good 'ole days when it was easily had for $1.00 ft.  

Paul, W9AC 


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