I built a carriage/track system for my 100 footer. For "track" I use two
heavy 9 (about 5/8" galvanized) cables held about 3 feet apart at the top
ans bottom of the tower by two pieces of 4" steel 'U" channel. Two 3 foot
pieces of 2" "U" channel welded the top and bottom of a four foot sectioin
of tower that has the rotator and antenna mounted on it is hauled up and
down with a winch cable that goes up over the top and back down to a winch.
Lots of little details to work out. but it does the job. But don't loose
track of the fact that "there's no free lunch". Among other things, you have
to get by the guylines.
Gene / W2LU
From: "pehaire" <firstname.lastname@example.org>
To: "Tower and HF antenna construction topics." <email@example.com>
Sent: Saturday, March 27, 2010 12:41 PM
Subject: Re: [TowerTalk] Homebrew Crank-up
>I am jumping into the middle of a thread because I have lost several
> e-mails. I don't know if this will help.
> In the 1960 issue of Orr's Beam Antenna Handbook on page 66 are some
> of W6YMD's 110 foot telephone pole tower with its track assembly.
> On page 162 is a track system of K9UZG. He uses channel iron for a track
> and skate wheels for the rollers on a carriage holding rotator and yagi.
> talked to him and he sent me the detail drawing but they have been lost
> moving from home to home over the years.
> I have had much pleasure over the years with a 30 foot tower and a hinged
> mast with all sorts of fixtures I welded and bolted to my tower.
> Like DeMaw and McCoy says, propagation is 95 percent of a contact .
> ----- Original Message -----
> From: "jimlux" <firstname.lastname@example.org>
> To: "Tower and HF antenna construction topics." <email@example.com>
> Sent: Saturday, March 27, 2010 10:14 AM
> Subject: Re: [TowerTalk] Homebrew Crank-up
>> firstname.lastname@example.org wrote:
>>> Plan to budget about $9000 for a licensed PE and SE team to study,
>>> stamp, and approve the plan for TIA-G for the zip code of the project.
>>> Otherwise, if there is a failure/property damage/injury, the liability
>>> falls on the shoulders of the builder. Pun intended.
>> Oddly, depending on how it's done, it might not fall under TIA-222. I
>> don't think tower trailers follow TIA-222, for instance.
>> It might be more like an extending boom crane, from a regulatory
>> standpoint. Or some other weird thing.
>> $9K doesn't buy a whole lot of engineering hours, by the way...
>> designing something like this is a somewhat bigger job than that.
>> But, sure.. if it falls down, he/she who built it is on the hook.
>> By the way, googling for "temporary lighting tower" or "temporary
>> communications tower" brings up lots of companies who build stuff like
>> this, with pretty detailed photos and drawings for design ideas.
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