On Thu, 14 Aug 2008 22:13:34 +0000, m II wrote:

Dave wrote:

I've tried manipulating my twin lead cable into that configuration, to
no avail. The best I can get is something resembling a double helix.
If I leave it twisted like that, it may have genetic ramifications.

For parallel lines it's diameter v distance. Common zip cord is ca. 75
Ohms.

Now, I've always been led to believe that a ratio is a unit less
quantity. I get the feeling that some length of cable is needed here to
get an ohmic value. Perhaps something approaching infinity?

Characteristic Z assumes infinite length.
mike (easy as falling off a Log) II