[TowerTalk] Vertical Antenna Tubing Strength (was: Increasingeffective 4SQR array bandwidth???

[Guy Olinger, K2AV]

I think there is a large audience for answers to this question.  My own
80 M plans revolve around the emergence of something of this nature.
Please keep the discussion on the reflector. Thanks.

73, Guy.
-----------------

Guy Olinger, K2AV
Apex, NC, USA

----- Original Message -----
From: "Tom Rauch" <w8ji@akorn.net>
To: <n4kg@juno.com>; <TOWERTALK@contesting.com>; "J. Kincade"
<w5kp@swbell.net>
Sent: Thursday, August 30, 2001 9:27 AM
Subject: Re: [TowerTalk] Vertical Antenna Tubing Strength (was:
Increasingeffective 4SQR array bandwidth???


>
>
> > Tom, wouldn't that make 20' sections of 4" irrigation pipe the
> > material of choice for large (over 40') verticals? Only problem is,
I
> > have no idea what grade of aluminum they are made of. 73, Jerry
>
> Very interesting Tom.
>
> I am still trying to make 80 meter verticals that hold up well. I was
> thinking or irrigation tubing, but it is so soft and thin it scares
me. I
> don't mind guying it, but installing the irrigation tubing seems to be
> a problem.
>
> I was thinking of having Hygain send me boom material like 2" x
> .125 wall 6061-T6 swedged to fit the next section in nine 8 foot
> sections.
>
> I didn't want to taper because of the shortening effect, and
> bandwidth reduction, unless I can offset that with a hat at top.
>
> Is there software available for calculating stresses, or proven plans
> that work for an 80-meter vertical that is easy to erect?
>
> 73, Tom W8JI
> W8JI@contesting.com
>
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List Sponsored by AN Wireless:  AN Wireless handles Rohn tower systems,
Trylon Titan towers, coax, hardline and more. Also check out our self
supporting towers up to 96 feet for under $1500!!  http://www.anwireless.com

-----
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