Im waiting for N6LF to add that to his review results.
http://www.antennasbyn6lf.com/files/vna_comparisons.pdf
Carl
KM1H
----- Original Message -----
From: "Paul Christensen" <w9ac@arrl.net>
To: <topband@contesting.com>
Sent: Tuesday, March 04, 2014 10:25 AM
Subject: Re: Topband: New MFJ 259C available
I had a look at the matching Rosenberger calibration standards and for the
money, the kit is a bargain. At first, I was disappointed to see what
amounts to only 1% resistive load accuracy. The displayed image on the
website shows a calibration standard that reads about 49.5 ohms. But, the
software automatically compensates for the disparity. It's possible to use
a DMM with 4-wire resistance capabilities to measure the exact DC
resistance then enter the value in a table to get excellent operating
accuracy, certainly better than 0.1%. Depending on the accuracy needed,
the VNWA software allows for several other important compensating factors.
http://www.hamcom.dk/VNWA/Rosenberger%20Cal%20standards_rev2.pdf
My only concern with the VNWA is in its ability to measure Topband antenna
systems where sweeps are required into the AMBC band. I'm still looking
for input from anyone who has made such measurements.
Paul, W9AC
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