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Re: [TenTec] TT Eagle tuner spec: SWR v. impedance range?

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] TT Eagle tuner spec: SWR v. impedance range?
From: shristov <shristov@ptt.rs>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Sat, 08 Jan 2011 17:56:23 +0100
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
"dbp tds.net" <dbp@tds.net> wrote:

> The Eagle spec sheet for the antenna tuner says: "Matching impedance range: 
> 10:1 SWR typical".

That would be a very good way of specification, if only it was true.
"SWR <= 10" is a unambiguous reference to a set of complex impedances,
i.e. those inside a certain circle on a Smith diagram.

But the impedance range of LC tuners is not confined to a circle
(or any other simple figure) on the Smith diagram, so a specification
as given above has NO definitive meaning.

It's just another way of saying that sometimes the tuner will match to SWR of 
and sometimes it will not.


Sinisa  YT1NT, VE3EA

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