Why don't you use aluminum tubing as most hams do. If your aluminum
dealer does not carry it check on irrigation pipe from a farm supply dealer.
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----- Original Message -----
From: "wi8w" <firstname.lastname@example.org>
Sent: Monday, August 04, 2003 4:49 PM
Subject: [TowerTalk] mast recommendation
> Living in Grand Rapids, MI with a population of somewhere near 1 million
> people you would think that finding a length of pipe for a mast would be a
> easy task...not so.
> I have spent the last week calling every steel dealer both in new and used
> steel for a chunk of 2 inch OD 1/4 inch wall 4130 pipe about 24 feet long.
> Did I find anyone who could supply it?...nope. All said it was special
> order and they could not guarantee 24 feet. best they could do is
> random betweek 17 and 24 feet Special order meant that not only did I
> to pay for the pipe (around $16 a foot) but I would have to pay the
> (about $300 for a 24 foot length). They all said that I could buy two
> pieces (and pay the shipping) and weld them together to make the 24 feet.
> am not a big fan of nor do I know how to weld anything short of a resistor
> to a circuit board.
> Anyone have any suggestions for a substitute at about a 24 foot length? I
> stacking the following:
> 2M/440 vertical
> 19 element 440 beam
> 20 element 2 meter twist antenna (10 vertical and 10 horizontal)
> 5 elements on 6 meters
> A4S tribander
> in that order top to bottom. Yep it is going to be tight and the first 10
> feet of the mast will be inside the tower
> 2 inch OD seems to be the biggest I can go given the size of the thrust
> bearing (TB-3) on the tower.
> Thom WI8W
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