Topband: Fwd: Re: Bev wire under a path?

[Herb Schoenbohm]

On 1/6/2012 10:33 AM, Ryszard Tymkiewicz wrote:
>  <Has anyone any experience of the effect on performance. I will be burying
>  <approx. 2-3% of its total length.
>
>  Neil&   All,
>  I was using this kind of passing roads quite often....usually the distance
>  was 3 meters in a soil. It was not affecting 160m but on 80m I noticed
>  a difference , probably a capcitance to a ground was significant.
>  In my main QTH where I have a lot of houses and tracks around
>  I'm using thin wire 0,7 mm and a support in 50 % are just trees 3-7m high.
>  Its easy to throw a reel of such wire over a tree.
>
>                              73 Rys
>                             SP5EWY



If looses are noticeable due to ground effect trench attenuation you can
use a bigger conduit and a bunch of tennis balls with a hole drilled in
the center as insulators to greatly improve the VF in an underground bridge.

Just a thought.

Herb Schoenbohm, KV4FZ