[TenTec] Zepp?

[Rick - DJ0IP / NJ0IP]

Joh, which bands did you try to use it on?  20m and above or did you also
try 40 or 80?
Which bands were you having trouble with?

Common mode current is not constant along a length of coax.  Its intensity
varies continuously.
It is worst 1/4 wavelength (and odd multiples thereof) away from its source
and minimum 1/2 wavelength (and any multiple thereof) away from its source.
Keep in mind that you must not use the normal velocity factor when
calculating these lengths.

For that reason, it is important to know the frequency the problem is
occurring on.

73 - Rick, DJ0IP
(Nr. Frankfurt am Main)


-----Original Message-----
From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of k6jek
Sent: Saturday, September 13, 2014 9:32 PM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] Zepp?

Rick, 

Gosh, that makes sense but it never occurred to me. Thanks for that little
bit of education.

Jon

On Sep 13, 2014, at 12:19 PM, Rick - DJ0IP / NJ0IP wrote:

> That's because the VF of the coax only pertains to the current flowing 
> inside the coax.
> Common mode current is flowing on the outside of the shield where the 
> VF is about 0.98, not 0.66.

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