Well, I might be willing to use a VNA that attaches to a computer in my Lab,
if I could get away with much lower cost than one of the Agilent or Rhode
and Schwarz VNAs. I'd like to have the capability to cover the 2.5 GHz
band and go considerably higher so I could look at harmonic filters for
2.5GHz.
I'd also like to be able to apply VNA measurements to some of my HF antennas
and I might be willing to take a laptop out there to do that, but I could
also just calibrate out the feedline to move the measurement plane out to
the antenna and do the measurments from indoors! Would be nice to have the
capability! I have seen a commercial VNA with a lot of capability that
attaches to a Computer for considerably less than a good Agilent VNA! I'm
thinking about it when some of my invoices get paid!
73,
Charlie, K4OTV
-----Original Message-----
From: Topband [mailto:topband-bounces@contesting.com] On Behalf Of Tom W8JI
Sent: Tuesday, March 04, 2014 9:48 PM
To: topband
Subject: Re: Topband: New MFJ 259C available
I thought a much more useful item would have been a 259 revision that was
totally immune to RFI, and still did about the same stuff over a wider
frequency range.
As I looked at things over the years, very few people want VNA's that attach
to PC's, and that market is covered anyway. I thought a 259 revision wth
direct conversion receivers and a wide frequency range, and a calibrate
function, and just basically do what the 259B does now, would have been much
better.
That would have solved all the major issues, and not cost a fortune or
required a computer. My 259B does 99% of what I need, but would be a whole
lot better with a cal correction (open, short, load), sweep, wide range, and
receivers with a phase detector instead of a diode bridge.
73 Tom
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