Wow Dick,,
You still have an MFJ-259 ?
That's incredible, I think they came over on the Mayflower.
Just kidding, I have one too and it still works fine. :-)
I bought an AA-30 also and like the graphs it does.
73,
Bob
K6UJ
On 7/9/16 10:48 AM, Richard Solomon wrote:
You guys can laugh all you want to,
but my MFJ-259, which is quite old,
maybe 15 years ?? Still works like
a charm.
73, Dick, W1KSZ
On Sat, Jul 9, 2016 at 9:59 AM, Jim Brown <jim@audiosystemsgroup.com> wrote:
On Sat,7/9/2016 4:52 AM, Bill Cotter wrote:
Attached is a marketing analysis of several handheld analyzers I did for
our ham club. It has links to the technical details.
The Tower Talk list does not support attachments.
Hardy,
You said you wanted something to drag to the top of a tower, but with this
analyzer, you can easily get good data from anywhere on the feedline,
including the shack.
http://sdr-kits.net/VNWA3_Description.html
I no longer climb anything higher than a stepladder, so I do all my
measurements from the shack. It needs no power supply, getting its power
from the USB port that connects it to the computer that processes the data.
As an engineer, you will really appreciate it.
It does TDR by computing the inverse FFT of a sweep, which can be set for
any range that you choose for the level of detail you need. There's some
math built into the control software, and it exports data in several
formats, including s1p Touchstone files, which can be imported by SimSmith
and ZPlots, among others. It's a full vector network analyzer, so it also
measures S21.
I paid $740 three years ago, shipped to my W6 QTH, with calibration loads
and a case that I wouldn't order again. With the Pound in free fall, my
guess is that you could buy it for about $650 today. It's a real winner.
Well supported by the mfr (some hams in the UK) and the designer, DG8SAQ, a
university EE prof who also wrote the software.
73, Jim K9YC
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