[TowerTalk] Interaction with the Optibeam 16-3

[Roger (K8RI) on TT]

Depending on the band and height to determine the segment lengths, I 
started with relatively short lengths and made them progressively longer 
as I went down making sure to avoid resonant lengths and stay shorter 
than resonant lengths for the first wave lenfth, but that was before 
modeling software was available. I have since gone to Phillystran where 
only the last 10 to 15 feet are steel.

People talk of stretch, but even with the big array on top, I've been 
"up there"(at the top of the 100' 45G) when it was too windy to be on 
the safe side, yet I could feel no movement.

"They say" to never look down, but on a partly cloudy and windy day, I'd 
say, "Never look up"

73

Roger (K8RI)


On 10/1/2015 7:26 PM, Steve London wrote:
> K9RX wrote:
>
>> Modeling guys for example – the ARRL AB dimensions
>> for ‘safe lengths’ ... aren’t! They couple enough energy, I’ve tried 
>> a good
>> variance of lengths
>
> Funny you should mention this. The next issue of the National Contest 
> Journal (published by the ARRL) will have an article on this very 
> subject.
>
> 73,
> Steve, N2IC
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-- 

73

Roger (K8RI)


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