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
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UR RST IS ... ... ..9 QSB QSB - hw? BK
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