[TowerTalk] fiberglass masts

[Alex Malyava]

they are pretty rare now, especially in good condition and are not cheap at all

On Thu, Dec 11, 2008 at 10:25 PM, Norm Schklar <schklar at gmail.com> wrote:
> http://www.ontariosurplus.com/ab577.htm
> Back in my days in the Signal Corps we used this to go over 50 ft.  I've
> seen them at hamfests.
>
>
>
>
> On Thu, Dec 11, 2008 at 11:08 AM, Art Trampler <atrampler at att.net> wrote:
>
>> This is an antenna support question...so hopefully it is close enough to a
>> tower to allow a little discussion!
>>
>> I have been thinking about constructing an antenna support of military
>> surplus 48" fiberglass masts.  I would like to get up close to 70', though,
>> both for an inverted vee and to run a wire vertical up it.
>>
>> Here is what I am considering: using 3 of the masts, joined with U-bolts
>> around (or inside?) of 6" or 8" diameter PVC pipe, sliced into 3" or 4"
>> pieces.  I would rather use u-bolts than drill/bolt through so as not to
>> weaken the fiberglass, and also to make keeping things even a bit easier.
>>
>> I would guy this at two, or if necessary three levels with dacron rope.
>>
>> So am I crazy?  Or is there a real structural advantage to this over a
>> single, guyed mast such as the one sold by MFJ?
>>
>> For the vertical, I am playing with the design for the relay-switched
>> dipole that was in QST a few months ago, using ladder line.  With such a
>> design I could put relays for each band (two each on 40 and 80/75) for full
>> coverage with very little, or without compromise.  Perhaps I could later add
>> base-loading for 160, or a combination of top loading/capacity hat switched
>> in/out and something at the base.  The fiberglass would lend itself to this,
>> and to supporting an inverted vee.
>>
>> Feedback is appreciate, and since this isn't a true tower (of steel or
>> aluminum), please feel free to contact me directly.
>>
>> Art, KØRO
>> atrampler at att.net
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>>
>>
>>
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>
>
>
> --
> Norm Schklar
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