[Antennas] Building Full-Size 80m Vertical Query-Help. . . . .

[n8de at thepoint.net]

I am in the process of erecting three 80m verticals, all of which with  
60' of Universal aluminum towering and a small 2" aluminum tubing out  
of the top.
The base sections are standard Universal items, in about 2.5 cubic  
yards of concrete, which I connect to the bottom section of each tower  
with very short [about 7"] pieces of solid fiberglas ROD as insulators.
The insulators I am using are of 1" rod, though your local farm/home  
dealer may have the proper size fiberglas rod ... they sell it as  
pre-drilled fiberglas fence posts.  About 1.25" in diameter.  I  
already have the 1" rod, but that stuff requires some 'fitting' at the  
base.  No problem for me as I have done it before with my 80m vertical  
which I used in Indiana from 1989-2004.
Don
N8DE

Quoting Chris Boone <Cboone at earthlink.net>:

> Stick the legs directly in concrete??? Usually works for me....If the tower
> is to be properly held and supported at the side (and that's not easy as it
> sounds), any insulating material (Nylon, Lexan, etc) which doesn't arc over
> with the power level you plan running would do..OR find a ceramic base and
> put a plate on the bottom of the HBX, stick it on the top of the ceramic and
> do as the broadcast boys do...but this would require guying to be safe.
> REMEMBER any attachments to the tower will need to be insulated....wood can
> catch fire if at a high current point....be CAREFUL.
>
> Chris
> WB5ITT
>
> -----Original Message-----
> From: antennas-bounces at mailman.qth.net
> [mailto:antennas-bounces at mailman.qth.net] On Behalf Of Aa9mo at aol.com
> Sent: Friday, August 07, 2009 6:26 PM
> To: Antennas at mailman.qth.net
> Subject: [Antennas] Building Full-Size 80m Vertical Query-Help. . . . .
>
> I was recently given four tower sections of Rohn HBX - - - the four  top
> sections, and would like to use them to build a full-size 80-meter
> vertical.
>   Those four sections would make up the lower 32 feet  of the vertical, and
> I have more than enough aluminum tubing to make up a mast  for the top
> section of about 35 feet or so.
>
> My question, is that I'd like to insulate the three base legs from ground,
> and I really can't spend much to do so.
> I would really appreciate any and all suggesstions on how I might be able
> to reliably insulate the three legs, while providing a sound structure.
> My plan is to solidly attach the tower sections to reinforced areas on a
> side of the house at about 15 and 24 feet, so that the tower sections can be
>
> safely climbed.
>
> Thanks for any help and consideration,
> Susan, AA9MO
>
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