I use a modified HyTower on 160m with 4 elevated radials. The first time
around I wound a coil and base loaded it but it turns out that at the top of
the tower there is a high voltage point between the tower and the stinger.
Blew a hole right through the 3/8" thick insulator at the top of the tower.
So I modified the HyTower to top loading. I replaced the stinger with 2" od
boom sections to get it up to 50-60 feet and added 4 wires from the top that
slope outward for the top hat (the wires are cut to length for resonance and
then I use rope on out to the radial anchor points). I call it my Gladiator
on steroids, but it's really just a version of the 160m Gladiator. With the
elevated radials the feed point impedance came out to about 20 ohms so I
wound an unun (refer to Sevick's book) and it works great. 2:1 bandwidth is
about 60 KHz and to move from the cw portion up to phone I bring the top hat
anchors in a little closer to the feed point, which raises the resonant
frequency.
de Paul, W8AEF
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ZF2TA ZF2JI FO8DX FO0PLA 8Q7AA XZ0A
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----- Original Message -----
From: "Ed" <ed@privette.com>
To: <towertalk@contesting.com>
Sent: Monday, February 02, 2004 2:11 PM
Subject: [TowerTalk] Hy-gain Hy tower
> I have several questions for anyone using the Hy Tower.
>
> I'm am renovating an older Hy Tower. It's in the air but not yet
completed.
> I do have the 40 meter trap (MK-160 kit) which will allow 160m use.
>
> Is anyone using this antenna with elevated radials?
> Has anyone used an added inductor to the wire radiator to lower the 80m
> resonance point to the CW portion of the band?
> Successfully used the antenna on WARC bands?
> Comments on 160m operation?
>
> Thanks, Ed W4EP
>
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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