[TowerTalk] impedance meter recommendations pse

[Keith Dutson]

What issue of QST?  Is it a product review?  I could not find it in the A's
under product reviews.

73, Keith NM5G

-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of Richard (Rick)
Karlquist
Sent: Thursday, December 28, 2006 10:24 AM
To: Jim Lux; Telegrapher9 at aol.com; towertalk at contesting.com
Subject: Re: [TowerTalk] impedance meter recommendations pse

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.
> 
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