Topband: Mother of all ferrite common-mode coaxial chokes

[mstangelo at comcast.net]

Tom and All,

I also use phono connectors on some older radios. I'd prefer to substitute BNC connectors but I don't want to modify the equipment.

What I find helpful is to squeeze the shell of the plug so that it will fit tightly on the female receptacle and cover the shell with heat shrinkable tubing so that the pressure is always applied to the connection.

Mike N2MS.

----- Original Message -----
From: Tom W8JI <w8ji at w8ji.com>
To: topband at contesting.com
Sent: Fri, 13 Jul 2012 16:08:18 -0000 (UTC)
Subject: Re: Topband: Mother of all ferrite common-mode coaxial chokes

<snip>

Because I use phono plugs that really have improper shield grounding 
integrity, and sometimes the pressure connections add a tiny bit of unwanted 
shield impedance to the groundplane of "the box entrance", I use high 
impedance beads on these particular cables. I also, as a practice, keep an 
eye on those connectors. I use those connectors by necessity, because 
several of my radios use phono plugs for external antenna ports, and there 
is no easy way to change connectors.