[UK-CONTEST] [Fwd: Re: 23 cms Antenna help pse]

[Paul_group]

ALEX LISTER wrote:
> At LRS we have a long  Yagi for 23 cms, 
> Approx abt 5 metre or longer.
> Think its WILMO or possibly Tonna
> Conventional elements ie not JVL loop.
> Elements are made from enamelled copper wire.

It sounds like a 55 elememt tonna.

If the elements stand off the boom on little plastic supports, maybe
40mm long then its a tonna.

A very good antenna, When I was in IO83 I used four in a box pattern for
many years.

But once they have been in the sun (uv) for a season, the plastic
element supports become very brittle, anything bigger than a starling
will break elements off. I ended up sweeping the elements up off the
drive. For that reason alone I wouldn't buy them these days. Driven
element only rated 300W although even at much higher powers never had
any issues.



 From behind the mountains here I use a 2m dish rather than yagi's - but
*if* I were in the market for a ready made product: Wimo make a range of
SHF yagis that use a modern optimised design and are far more robust
than the old Tonna. Sadly the economic downturn means antennas bought in
Euro's are very expensive.

-- 
73 de Paul GW8IZR IO73TI
http://www.gw8izr.com


-- 
73 de Paul GW8IZR IO73TI
http://www.gw8izr.com