Topband: The guy who Sells AIM Products Responds

[Paul Christensen]

Depends on the claim(s) in question which may affect the novelty of the 
software or a process more than the VNA hardware.  Also, I believe W5BIG has 
both a two-port VNA in addition to the single-port CIA line.

Since this discussion is on the topband list, I'm interested in the VNWA's 
immunity to strong AMBC signals -- not only within the 160m band but for 
measurements that sweep down to as low as 1200 kHz since an effective 
shorted 'T' can be over-resonated into the AMBC band where sweep 
measurements are useful.

At first glance, the VNWA's output power seems weak for this purpose, but 
perhaps its filtering method and/or software assists with immunity as does 
MyVNA software for the N2PK unit and the software that comes bundled with 
the W5BIG products.  The two latter products produce superb plotting results 
when sweeping through the AMBC frequencies in the presence of strong RF 
fields.

Paul, W9AC


-----Original Message----- 
From: Joe Subich, W4TV
Sent: Tuesday, February 25, 2014 2:44 PM
To: topband at contesting.com
Subject: Re: Topband: The guy who Sells AIM Products Responds


On 2/25/2014 1:36 PM, Jay Terleski wrote:
>
> Lets set this record straight.  Jan over at SDR kits is a friend, and I 
> met
> with him in Germany as well as Dr. Baier. He and I agreed that the patent
> is possibly infringed in the USA that Bob Clunn developed and his SDR Kit
> business is not really wanting to get much bigger so doing any advertising
> in the USA or even the QST review was moot. He really doesn't want to
> infringe with his hobby business and counts USA sales as being very very
> small.

Seems a bit afield to be equating a single port antenna analyzer (AIM)
to a two port VNA.  There are many important measurements the VNA can
perform that the antenna analyzer can not - particularly measurements
of port to port isolation and filter transmission parameters.

73,

    ... Joe, W4TV

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