I'm pretty sure my old ARRL Antenna Book (1988, 15th Edition) has that setup
(top-fed, grounded tower) in the section on shunt-fed towers.
73 - JC, K0HPS
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com]On Behalf Of Merlin-7 KI4ILB
Sent: Sunday, August 13, 2006 10:13 AM
To: TOWERTALK@contesting.com
Subject: [TowerTalk] Weird antenna question
<snip>Remember the guy wire your antenna was then laying on is just adding
an
additional wire to your antenna system.
The Ground end is many feet away and depending on the frequency and distance
to the ground, the connection to ground itself may not have had much effect
Now this has me thinking, Has anyone ever built an antenna out of a
(GROUNDED) tower by feeding at the top?
I could run some coax up there and ground the feed to the upper part of the
tower and I guess I could just run a long wire or something from the sheild
side of the coax.
Connect my antenna analizer up and see what it says.
If I find a frequency it likes I could then do some field patteren tests
with a field strength meter.
might be kinda fun, I would need to keep a close eye on the swr etc...I
have a feeling it is acting as some kind of loop antenna
Thanks
Joe
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