[TowerTalk] impedance meter recommendations pse

[Richard (Rick) Karlquist]

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.

Rick N6RK


 
> At 08:29 PM 12/27/2006, Telegrapher9 at 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.
>