Hello.  We are Yanks visiting NZ by yacht.  We recently upgraded our TV from an old analogue CRT to a new Sharp LCD unit which we use to receive free to air broadcasts.  Unfortunately, our Vodafone wireless GPRS card (wireless internet) now causes MAJOR intolerable interference to TV reception.  Is there a remedy for this?  The TV is fed by coax from an amplifed (12 v) antenna on a gimballed mount on the backstay.  The TV is powered by our 110v inverter.  Nothing was changed in the installation except replacing the TV.