"Owen Duffy" wrote in message
...
On Wed, 13 Sep 2006 20:30:14 -0400, "Jimmie D"
wrote:


With knowledge, you should be able do this easy enough without an
antenna analyser.
...
I am thinking about building an ANTENNASCOPE, see fig 1 at
http://digilander.libero.it/hamweb/r...tennascope.htm
. This one doesnt allow you to measure impedance but i thought if I
replaced
one of the capacitors in the bridge circuit with a variable cap of about
twice the value I could at least tell if an antenna was inductive or
capacitive by which way I had to adjust the cap to get a perfect null. I
think I have most if not all of the parts.

It looks like you are going to develop an instrument to solve the
problem, when you should be able to solve it with a little ingenuity
and the VSWR meter that you have.

Owen
--

Oh I know I can, this just seemed like it might be fun. I figure I can
cobble this together in a couple of hours and have a useful instrument when
I get finished.

Jimmie

Thanks all I got the antenna finished this past Tuesday. When I got finished
the stub seemed a little short, 5'11". Does this mean the antenna is a
little long?. The stub is still straight. I got the SWR down to 1.2:1, I
think I am going to leave it there. I built the ANTENNASCOPE but I am unsure
whether it is telling me the antenna is inductive or capacitive at this
point. Oh well I will set up a little groundplane antenna on 10 or 15 that I
know is too long and see how it reacts.