can i convert cable/tv signals to run on a UTP/10BaseT network and if so, how?

Well, converting the signals to run on UTP cabling seems to be as easy
as buying some adapters. I found many such at Patton Electronics
Company ( http://www.patton.com/ )

If, however, you're talking about mixing that signal along with data
traffic on a LAN, then the answer is probably no. The compression
needed to convert the signal into data just isn't viable. There may be
examples of attempts, but from what I can tell, there're mostly
unwatchable.

The only promising link was from an old Novell Developer network memo.
They rever to a product (WebCRE) which may not even exist. I can find
no other reference to it on the web.

Additional Links:

Cable Converters to running video signals on UTP
http://www.patton.com/cgi-patton/catalog-bin/display.cgi?model=400

Novell link "Meet On-demand Video Head On with WebCRE"
http://developer.novell.com/research/appnotes/1998/february/netnotes/02.htm

Search Strategy:

tv signal UTP
://www.google.com/search?num=20&hl=en&lr=&safe=off&q=tv+signal+UTP

"Video Over 10BaseT"
://www.google.com/search?num=20&hl=en&lr=&safe=off&q=%22Video+Over+10BaseT%22

If you are looking to broadcast video over your tcp/ip network using
multicast or udp and you are a bit computer savvy then you could look
at video 4 linux.
I have used it and it works well to play my dvd's from my main server
to my viewing machine.

http://www.exploits.org/v4l/

The main site (which appears to be down had clients for osx windows
etc...) keep checking...

cheers
James.

Oops here is what I was actually running sorry about that

http://www.videolan.org

I agree. If you have video that is already compressed, then Streaming
MPEG is an acceptable method, tho' I still think it would look yucky
at 10BaseT speeds. 100BaseT is a different story.

I believe the questioner was talking about live as-yet-uncompressed
video.