Topband: Underground twisted pair

["Bruce" <k1fz@myfairpoint.net>]

Anyone on the reflector had experience burying unshielded twisted pair wires at 
HF frequencies?.  

How much loss?   Estimated ?  Measured? 

When burying, was there a before and after  common mode increase ?


Notes
At audio frequencies the phone companies used to run many twisted pair in lead 
shields.

In Radio stations, where I was employed, shielded twisted audio cables were 
used in high RF environments successfully.

Thanks in advance for replies.

73
Bruce-K1FZ
www.qsl.net/k1fz/bogantennanotes/index.html


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Topband Reflector