[TowerTalk] Re: Adjusting antenna tuners

[Michael Tope]

That's a great suggestion, Eric. Too bad the MFJ-269 that I have doesn't
have the graphical display. I am sure that really speeds up the process.
Actually, the ARRL lab probably has an HP network analyzer. Hopefully
they used it during the testing process to do exactly what you suggested.

73 de Mike, W4EF............................

----- Original Message -----
From: "Eric Scace K3NA" <eric at k3na.org>
To: "Michael Tope" <W4EF at dellroy.com>; <towertalk at contesting.com>; "Chuck
Counselman" <ccc at space.mit.edu>
Sent: Wednesday, January 29, 2003 3:38 AM
Subject: Adjusting antenna tuners


>    A very convenient way to adjust antenna tuners is to use a handheld
impedance analyzer as the signal source.  I happen to use an
> AEA CIA-HF, which can graph the SWR across the band.  Not only can I see
how broad or narrow-banded the tuner's "solution" is, but I
> can also easily see which way things change when I turn the various
controls of C and L.  I tweak for the solution that gives the
> broadest, flattest match.
>
>    Lastly, the signal level emitted by the analyzer is very low so QRM on
the bands is reduced.
>
> -- Eric K3NA
>
>
>