[TowerTalk] Boom Supports

[K8RI]

On 7/17/2013 11:27 AM, John Lemay wrote:
> Chuck
>
> Your proposal is perfectly sound. A number of commercial manufacturers use
> this approach. You want to keep the weight to a minimum at the top of the
> mast, so use aluminium, not steel.
>
> The great advantage of putting the support "pylon" on the mounting plate is
> that you can pre-tension the support ropes before installation, and get the
> boom nice and straight. Note that some ropes will stretch more than others
> over time so you might want to test it at ground levels for a day or two.
>
> John G4ZTR
<snip>

The old 7L C3i 6-meter Yagi with near a 30' boom uses a tube like this. 
  Tube, or angle Mounted to the mounting plat extending up in this case 
about 3 or 4 feet and use 1/2" or 5/8" tube for the truss.  I replaced 
the truss with the small Phillystran. As John said, you can tension it 
before installation.


73

Roger (K8RI)

>
> Thanks in advance!  Always enjoy the wealth of knowledge on this reflector!!
>
> Chuck  KØTVD
> www.dxham.net
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