[Top] [All Lists]

Re: Topband: AIM4170 antenna analyzer

Subject: Re: Topband: AIM4170 antenna analyzer
From: "Rick Karlquist" <>
Date: Tue, 4 Sep 2007 15:33:16 -0700 (PDT)
List-post: <>
John Kaufmann wrote:
> A some of you may know, the AIM4170 antenna/impedance analyzer was
> Immunity to RF overload appears to be quite good.  I took the analyzer to
> a friend's QTH for antenna measurements.  He lives very close to a 50 KW
> AM BC station.  With a wideband scope we measured 0.4 V peak RF across the
> feedpoint of the antenna from the BC station.  However, we had no trouble
> making good measurements from 160 to 10 meters.  My friend's Autek
> analyzer completed folded up in the presence of the same interference.
> The manual for the AIM4170 indicates 2 V peak is the "damage" threshold
> for the device.

Depends on what "good" means.  I am 6 miles from the nearest BC
station and the AIM4170 is useless measuring my 90 foot 160 meter
vertical.  The manufacturer refuses to modify the software to allow a BCB
reject filter to be calibrated out, so I have a $500 paper weight.  Even
if this software is written, I have to spend $200 on a BCB reject filter
to make it work.

Rick N6RK

> Another feature, which I find very useful and important, is an automated
> calibration procedure that compensates for the stray
> inductance/capacitance of measurement leads.  Those of you who have tried
> to make measurements of high impedances at high frequencies can appreciate
> how important this is.
> Disclaimer:  I have no affiliation with or commercial interest in the
> vendor.  I am a very satisfied user and highly recommend this unit.  It
> provides a lot of performance at a very reasonable price.
> 73, John W1FV
> _______________________________________________
> Topband mailing list

Topband mailing list

<Prev in Thread] Current Thread [Next in Thread>