ultratv needs 1 ghz rated coax.
cat5e is rated at 350 mhz.
the bandwidth just isn't there.
cat6 can't even do it at 400 mhz
You need coax cable. Just remove a cat5e jack.. tape on some bulk coax .. and use the cat5e as a pull string to run it back wherever it's going.
You could try one of these:
»www.ramelectronics.net/500302-2P ··· 2PK.aspx
but if you have any problems and call out a tech, they will rip that sh*t out and tell you that you need to pay them to run a coax cable.