[TowerTalk] 40M rotary dipole and CM current

[Drew Vonada-Smith]

Doug,

First of all, that isn’t quite true.  Common mode rejection of an receiver RF input is not perfect.  But it is almost true, so let's call that part good.

But, these common mode currents on the shield travel and radiate.  Therefore, they get to your antenna, and THEN they ARE on the center conductor.  You hear them.

73,
Drew K3PA



-----Original Message-----


Message: 1
Date: Thu, 21 Sep 2017 11:06:58 -0700
From: "Doug Ronald" <doug at dougronald.com>
To: <towertalk at contesting.com>
Subject: Re: [TowerTalk] 40M rotary dipole
Message-ID: <005301d33304$6b0b6130$41222390$@dougronald.com>
Content-Type: text/plain;	charset="us-ascii"

The RF current your receiver responds to flows on the inside of the outer shield of the coax transmission line, so what difference does it make what currents may be flowing on the outside of the shield?

Doug
W6DSR 
************************************