I was introduced to the SARK-110 several years ago and besides being an
excellent antenna analyzer, it had one feature that nobody else had
(when I bought the SARK) and that is called a "Time Domain
Reflectometer". This allows you to find breaks, impedance bumps and
other anomalies in cable runs.
During my 20 years in the Army, I was introduced to a hugely expensive
HP-140A oscilloscope with a TDR plug in. We used it to find cuts in our
buried coax where the local people were digging it up for the copper
(back in 1967). From that point on, I always wanted a TDR but they were
way too expensive (even used) for a poor ham to even consider until I
was introduced to the SARK by a good friend at the "OzarkCon" QRP
convention. It paid for itself quickly by finding where a gopher (or
mole) had chewed mostly through some buried coax I had going to a
vertical in the back yard. The SARK's TDR pinpointed the break within a
foot and it was probably more accurate than that as my measurements when
following the cable were somewhat sloppy.
It also makes a pretty decent signal generator as well, can be
calibrated against WWV with not too much effort, but the minimum signal
you can output is 50 microvolts (S9) so a good external step attenuator
is needed along with double shielded cables to minimize feedthrough of
the SARK's output signal. Oh yes, I did mention, it's an excellent
antanna analyzer as well and it will do Smith Chart plots and other
stuff too. You can control it with a computer via USB too.
No financial interest in the company, just a very happy user.
Jim - W0EB
------ Original Message ------
From: "John Oppenheimer" <j...@kn5l.net>
To: elecraft@mailman.qth.net
Sent: 12/1/2017 7:23:20 AM
Subject: Re: [Elecraft] Antenna Analyzer
The SARK 110 is very small with many features:
http://www.sark110.com/
John KN5L
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