[TowerTalk] Masting source

[Grant Saviers]

For the requested A4S application, 6061-T6 tube would work, even making 
one from sleeved DXEngineering 0.120" wall tube (which I suggested 
privately).  Cheap and UPS deliverable.

I had a TH7DX (2x an A4S load) on 22ft of 2" x 0.375 6061, 18ft above 
the house bracketed Rohn 25, it survived 3 hurricanes in EMA.  A bit 
bendy when tilting over the tower, but plenty strong enough.

Another steel choice is A513 DOM, slightly less strong than 4130 but 
much cheaper.  Also more likely in stock.

Grant KZ1W

On 12/29/2019 04:53, john at kk9a.com wrote:
> For a small Cushcraft tribander and 2m beam a Ø 3" 4130 mast may be a 
> little overkill:)
> 
> 1026 DOM is a very good mast material, not all masts need to be chrome 
> molly. Even aluminum can work well and it requires no corrosion coating. 
> I had two Ø 2 1/2 aluminum masts at http://www.p40a.com and they held up 
> well in that tough environment.
> 
> John KK9A
> 
> 
> 
> 
> From:    Charles Gallo KG2V
> Date:    Sat, 28 Dec 2019 13:38:15 -0500
> 
> The problem with most sources is that shipping is the killer.
> As someone said, under a certain length (108 inches aka 9ft) it can go UPS,
> over, you are looking at truck.
> What we call CrMo DOM mast is more commonly referred to as 4130 tube. If 
> you
> have a ‘local’ steel supplier, there is a good chance they either have 
> it, or
> can get it fairly easily, and you may be able to pick it up. (Assuming 
> you have
> a truck), or they might be willing to do a delivery (expect to pay). If you
> have a local machine shop, or user of steel, you might be able to sweet 
> talk
> them into ordering the material on their next shipment, and the delivery 
> gets
> lumped in. Hint, your 90-200 lbs of mast (3” .250 wall, about 7.75 lbs/ft,
> smaller diameters less) doesn’t mean much when they are getting 3+ tons of
> steel delivered.
> -- 
> 73 de KG2V
> Charlie
> 
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