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

[N2TK, Tony]

Thanks Paul for the input on the RG-303
N2TK, Tony

-----Original Message-----
From: RFI [mailto:rfi-bounces at contesting.com] On Behalf Of Paul Christensen
Sent: Tuesday, January 29, 2019 3:56 PM
To: 'Rfi List' <rfi at contesting.com>
Subject: [RFI] FW: Common mode choke on 4 Square feedlines without skewing
phasing?

>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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