[TowerTalk] Small mast design - comments?

[jimlux]

On 11/11/20 2:51 PM, john at kk9a.com wrote:
> Correct , there is a lot of tolerance on extruded tubing and it will likely
> require machining to fit together.
> 
> John KK9A
> 
> Ron Gorski ron-n9au wrote:
> 
> No. The 1-1/4 inner tube will not necessarily fit inside the 1-1/2 in tube
> because of nominal manufacturing tolerances.
> Ron N9AU
> 


Have you looked at using Unistrut (actually generically called "strut 
channel") it's pretty stiff, and a 10 foot length of the standard 1 
5/8"x1 5/8" in galvanized steel is about $30.  Aluminum is about $55.


It's kind of like erector set for adults.

There's all manner of clamps and brackets you can get for it to bolt 
equipment to the struts.

There's a smaller size unistrut (low profile) which is less expensive 
(about 60%)