But this stuff surely isn't anything like as strong as the $20/ft.
Chrome-Moly stuff they sell to support an HF Yagi 15ft. above the top of
the 60ft. tower.
It may work well as a guyed antenna support, but when I hear "mast" I
think "unsupported," as in the scenario above.
73
Alan NV8A
On 09/12/05 12:32 pm Fred Roberts tossed the following ingredients into
the ever-growing pot of cybersoup:
> Most people are unaware that fence companies carry "top rail". Whenever I
> mention
> fence top rail, everyone envisions the backyard fence and its 1" or 1-1/4"
> top rail.
> There are, however, many larger diameters of top rail and they come in 22'
> (and I
> believe 24' lengths) - the largest diameters I have are 1-7/8" and 2-7/8".
> And, if
> you need a longer length, one can be nested. We have put up 1-1/2 lengths
> and 2
> lengths for Field Day - erecting and guying 1-1/2 lengths is easy, erecting
> and
> guying 2 lengths is harder.
>
> We just completed a weekend operation with W1AW/6 and our antenna farm (3-el
> 20M
> Yagi, 2-el 15M Quad, 40M Inv V, 80M Inv V, 2M j-pole, and ATV dish) on the
> roof of a
> 12-story hotel here in Riverside. We had a 3-el 20M beam on a 22' length of
> 1-7/8"
> top rail - it was tied to cell phone structure which happened to be on the
> roof (the
> highest tie point was at 7'). There was no mast wiggle at all and we did
> have windy
> afternoons.
>
> Oh, the top rail was about $20. several years ago, and although it is surely
> higher
> today, it can't be more than $40. It is galvanized and sturdy - I used to
> use this
> to hold up an R7 vertical on my RV - 20 minutes to erect and 20 minutes to
> store.
>
> This is a cheap, durable and very effective solution. And, I presume the
> loss of the
> mast you are replacing was due to a poorly conceived guy wire system. Years
> ago, I
> experienced the loss of a poorly secured guy wire which released and then the
> mast
> bent. As they say, there's a lot to be said about respecting stored energy.
> :)
_______________________________________________
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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