[TowerTalk] square vs round booms

[Peter Voelpel]

I did not write that elements failed or booms broke. I wrote the mechanical
attachment to the Boom is not that good because the screws or threads are
longer then the boom diameter and small size, you can´t tighten them
sufficiently.

73
Peter, DJ7WW

-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of Kevin
Sent: Sonntag, 12. März 2017 15:50
To: towertalk at contesting.com
Subject: Re: [TowerTalk] square vs round booms

Optibeam's have been in the field for for how long now? Their multi-band 
beams have higher surface area (more elements) than most multi-band 
beams and I haven't heard of huge numbers of elements falling off, or 
broken booms.


On 3/10/2017 3:30 PM, Peter Voelpel wrote:
> All 49 elements on my KLM antennas hold nicely for more then 30 years with
a
> single band clamp on the round boom.
>
> I see problems with the square booms.
> To get a rigid clamp of elements to the boom large size screws are
necessary
> for the clamp.
> On Optibeams for instance the small diameter screws just get elongated
until
> they brake but do not hold the elements as good as those on my KLMs.
>
> 73
> Peter, DJ7WW