David wrote:
You can't send a MC phono signal 70' on co-ax either.
++++++++++++++++++++++++++++++++++
You mihgt find the story
at:http://broadcastengineering.com/mag/broadcasting_future_video_utp/
intersing.
It discribes using UTP (unshielded twisted pair) for video.


Mention is made of crosstalk.
For CAT5 cable 53dB of isolation at 4.2MHZ is acheived.
CAT6 gies 63dB at 4.2MHz.
Crostalk increases with frequency.

Another good refference that shows "failure" modes for twisted pair:
http://www.extron.com/technology/archive.asp?id=utptechnology

I have lost my bookmarks to a couple of links for coax cable "leakage"
and crosstalk specificitions. I will have to pull them from a backup
later this
week.

Why do you suppose that 99.99% of all CATV operations use coax for
the coper connections instead of twisted pair? Twisted pair is less
expensive,
so if it was "as good" as coax I suspect they would switch to it.

It has never been my contention that twisted and parallel balanced
pairs
have no place in the world. I just accept that while they do have many
usefull applicaitons, low level RF distribution isn't 'one of them.

By the way we are rolling out some component HDTV in house distribution
with CAT6 UTP. Looks pretty darn good after a 200' run. The CEO wanted
this and it was much cheaper to pull in good CAT6 then 4 coax cables.

Terry