[UK-CONTEST] Wire antennas slung over trees

[Clive Whelan]

I've used an air brick tied to the end of the halyard with success. 
Previously, movement of the 40ft eucalyptus tree regularly snapped 14SWG 
wire. After a while one could estimate the approximate wind speed and 
direction by the height of the air brick above the ground, and 
fascinating to see the brick "float" up and down.

This worked well until a storm blew the eucalyptus over ( they are 
notoriously shallow rooted), almost taking out a 125 train on the 
Swansea to Paddington main line! Ever since then I've never been able to 
recreate the 160m inverted L :-(


73



Clive
GW3NJW

ALANNOTTAGE at aol.com wrote:
> In a message dated 05/03/08 19:12:28 GMT Standard Time, g4fka at aol.com writes:
>
>
>   
>> Trees flex in the wind so  you'll need wire that can flex too.
>>
>>     
> ...or a flexy support line from the halyard.  Include a length of elastic in 
> series with rope (or w.h.y) line.  
>
> >From Radcom Tech topics 197? (and contributed by the late G4DYF)
>
> Al G0XBV 
>
>    
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