[TowerTalk] Aluminium telescopic mast

[Wes]

Maximo,

The easiest, although expensive, source is 
https://www.dxengineering.com/search/department/rigid-tubing?SortBy=Default&SortOrder=Ascending&N=department%3Arigid-tubing%2Bpart-type%3Aaluminum-tubing

The 0.058 inch wall tubing allows telescoping of tubes that are sized in 1/8" 
(.125) increments. The .120" wall thickness allows telescoping of tubes that are 
sized in 1/4" (.25) increments.  Note that these fit together much tighter than 
the mm sizes.

Wes  N7WS

On 7/17/2019 7:49 AM, Máximo EA1DDO_HK1H wrote:
> Hi all,
>
> Telescopic Aluminum masts are easy to make using metric tubes.
> Using 2mm wall tubes, then 30, 35, 40, 45, 50, 55, 60, 65mm (and so on) external diameters you get the telescopic feature easily, leaving 1mm clearance between tubes.
>
> I was trying to do same with "american tubes" but I couldn't find any size to get same telescopic thing.
>
> Anyone knows how to make a telescopic aluminium mast using customary tubes?
>
> Thank you
>
> 73, Maximo
>
>
>
> <http://foro.ea1ddo.es/>
>
>
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