I would add , without knowing the feedline setup,
that TV antennas are generally 300ohm and need a balun to go to 75 ohm
coax...for VHF and UHF work, I would say buy the best low insertion loss
balun you can(not radio shack, search google for hi quality ones!), locate
the lowest NF, highest IP3 pre amp right next to the balun and then just
about any length/type of coax down to the scanner and you will hear a lot!

HOWEVER, your mileage may vary,
tom f

"Skweezieweezie" wrote in message
news
If you can, remove the mounting hardware and
re-install it so the antenna is oriented vertically.
Most public safety transmissions are vertically
polarized. Turn the FM trap ON to eliminate any
intermod that strong local FM stations might generate.