Anyone interested in this topic should read the
recent QST article on the AIM-4170 antenna analyzer.
The article has a shoot out of this unit vs other
ham units and even an Agilent NA. It is a true
vector analyzer with a narrowband receiver. Most
other analyzers are scalar analyzers that use
the "3 voltmeter method" to determine phase angle
(which is why they can't determine sign) and use
a broadband detector, which is susceptable to BC
interference. The N2PK design is similar, but you
have to homebrew it, AFAIK.
I have purchased one of these and am evaluating it.
I will report on it on the reflector after I have
some experience with it.
BTW, I work for Agilent and am currently designing a new
Agilent network analyzer, so I have more than a
casual interest in these units.
> At 08:29 PM 12/27/2006, Telegrapher9@aol.com wrote:
> >Has anyone here had good results from any of the non-MFJ
> impedance meters? I
> >have an MFJ-259 and 269 and they are handy to have but not very
> >accurate in my
> >experience. I have made lab measurements against these and the
> results are
> >not as good as I'd like.
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