Mike is doing it CORRECTLY.
My only comment is, the quality of the coax plays NO ROLE in this.
CMC flows on the outside of the coax shield so it makes no difference if you
are using the best or the worst coax in the world - (as far as CMC is
concerned; of course you should use good coax for other reasons).
73 - Rick, DJ0IP
(Nr. Frankfurt am Main)
-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Mike
Schatzberg
Sent: Sunday, June 01, 2014 7:39 PM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] Trading radios
In my case the RF is radiated from my Yagi and the coax shield picks up the
radiation between the antenna feed point and the radio.
With good quality cable, the center conductor is not radiating. However,
the shield may indeed be carrying current.
Stations with RFI often only experience interference with their directional
arrays with the antenna in a certain alignment with their cable.
I use a 1:1 current balun at my Yagi hairpin feed point, and the line
isolator at the input to my amplifier, between it and the Orion II.
Seems to work well with all the radios here.
73,
Mike
W2AJI
Sent from my iPhone
> On Jun 1, 2014, at 12:42 PM, k4elo@fastmail.fm wrote:
>
> Disagree Bob. Put the choke at the feedpoint of the antenna or your
> coax will be radiating rf all the way down to the rig. If you can't
> move the antenna, this is the most effective rfi fix.
>
> 73
> Wayne
> K4ELO
>
>
>
>> For starters, as to RFI issues, yes antenna to radio spacing,
>> increasing same, will usually improve the issue. Be sure all equipment
is each
>> bonded to a common point such as the PS ground. Omit the external
>> ground but keep 3rd pin ground intact. Use a common mode choke on the
>> output of the radio.
>>
>> 73
>> Bob K4TAX
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