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TopBand: Shunt-fed tower

To: <topband@contesting.com>
Subject: TopBand: Shunt-fed tower
From: price.smith@worldnet.att.net (Harold Smith)
Date: Fri, 20 Mar 1998 14:41:52 +0000
At 06:28 PM 3/19/98 +0000, you wrote.
and I am replying.

Hello, Alex!

I have 78 feet of Rohn 45G with 3 big yagis for 20, 15 and 10 meters going
up to 100 feet. I shunt feed the tower for 160, using an omega match of 2 X
500pf 5Kv vacuum variables. I also have a half-sloper at 75 feet for 80
meters, an inverted vee for 40 meters at 70 feet and a Diamond X-200 for
2mtrs/70CM at 65 feet.
When I added the sloper and inverted vee I had to retune the omega match a
bit, but I see no degradation in the 160 meter performance. It gets out like
a bomb!!
Also the 80 and 40 meter antennas work as one would expect.
Make sure that you coaxs come all the way to the bottom of the tower. Mine
then go underground through 50cm dia plastic conduit to the house.
Good luck and 73 from 30km west of the Mississippi River near St. Louis, MO.
de Price W0RI


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