What are you using for a counterpoise? If elevated radials they will have
an affect. Or you may have something else in the vicinity that is affecting
your resonant frequency.
I started with a base loaded Hytower on 160m but found a high voltage point
between the top of the tower and the stinger. My 1500 watts blew a big hole
in the insulator. I removed the stinger, replaced it with about 30 feet of
2" aluminum mast and added 4 wires for top loading. I use 4 elevated
resonant radials and trimmed the top loading wires for resonance. Works
great.
de Paul, W8AEF
-----Original Message-----
From: topband-bounces@contesting.com [mailto:topband-bounces@contesting.com]
On Behalf Of John Webb
Sent: Monday, November 29, 2004 11:54 AM
To: topband@contesting.com
Subject: Topband: modified hy-tower help
Hello to all,I have modified a hy-tower to single band 160.In the top
section of the tower I have a loading coil made of nr12 solid copper wound
on a 2in form.The only way I could think of to wind the coil was bt cut and
try.OK,here's the problem.After some cutting and trying last weekend I got
her to abt 1780.OK,I am close..This weekend I removed abt a foot or so...Now
at 1760...I am at a loss as what to do.I have seen this on some mobile base
loads as far as taps.I do have a 259b if measurements would
help...thanks,john
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