[TenTec] Tuning Amp on 17 meters

[Rick - DJ0IP / NJ0IP]

James,

Ask you local Elmer to explain what he meant when he said the analyzer
doesn't really tell us impedance.
Perhaps there is a word missing in that sentence.

Like Jim told us yesterday, the analyzer is showing us the impedance of the
antenna *plus* feedline.
You can measure the impedance in the shack, and you can measure the feedline
alone without the antenna (or just use its known characteristics with TLW)
and mathematically calculate the true impedance of the antenna.  I think
there are even analyzers that enable you to plug in the characteristics of
the feedline and it adjusts its result to compensate for this, but I don't
own one of those.
(shore would make life easier!)

73
Rick, DJ0IP

-----Original Message-----
From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of Richards
Sent: Friday, April 19, 2013 10:10 AM
To: rmcgraw at blomand.net; Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] Tuning Amp on 17 meters


My local Elmer Guru guy told me the analyzer does not really tell me
impedance... and I am still trying to get what he means ... because I know
he is right and I wanna know.  But until then, I guess I, too, must read the
analyzer and get on the air when the SWR is low enough.  And I will like it
a lot better when I figure out what he is talking about!



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