Topband: New MFJ 259C available
km1h at jeremy.mv.com
Tue Mar 4 12:18:29 EST 2014
Im waiting for N6LF to add that to his review results.
----- Original Message -----
From: "Paul Christensen" <w9ac at arrl.net>
To: <topband at 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.
> 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
> Topband Reflector Archives - http://www.contesting.com/_topband
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