Topband: 160 meter vertical

[George & Marijke Guerin]

Bruce, et. al.,

Similar to Milt's reply, I recall someone using 11 straight sections of 25G,
a tapered top section with sleeve, and about 12 feet of 1-1/2 or 2 inch
galvanized pipe out the top.  The total length was about 128 feet.  Over a
good radial system, the feed point impedance should be about 38 ohms at 1830
KHz.  The 2:1 SWR bandwidth should be almost 100 KHz.
At W8TOP we ran 12 straight sections of 25G and a flat top section about 8
feet long, for a total of length of 126.5 feet.  (the sections telescope
about 3.5 inches each.  We used 120 radials up to 160 feet long.  The
antenna came in at about 1810 KHz.  We joked about trimming the bottom of
the top section to move the antenna up the band but did not do it.  The
insulators came from someone in W4 land.
Hope this helps,
73,    George    K8GG

----- Original Message -----
From: "bruce makas" <k1my at msn.com>
To: "Topband submital" <topband at contesting.com>
Sent: Wednesday, August 27, 2003 7:14 PM
Subject: Topband: 160 meter vertical


> I recall some discussion either here or on TowerTalk about using R25 tower
> sections with an aluminum "stinger" on top as a 160 vertical but I cannot
> find the particulars. Several questions:
>
> How tall do I make it? How may sections? How long a "stinger" I assume
that
> if I do this correctly that I will not need to concern myself with adding
> any L or C in the feed line. I do understand the importance of a good
ground
> system.
>
> Insulated from ground? If insulated, is anyone aware of someone who
> manufactures the insulators? Not the Rohn ones, I recall someone else had
> them.
>
> Thanks in advance.
>
> Bruce K1MY/7
> Overgaard, AZ
>
>
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