Total posts : 45366
The problem is that an FM Part 15 transmitter is not going to have 450 feet range reliably. I’d go with an Internet wireless link – you can use directional antennas and can have up to 1 watt power with a 6db antenna. Plus there’s plenty of hardware options. An alternative would be some sort of proprietary intranet link, such as Trango (they claim 10-20 mile ranges with the appropriate antennas, and depending on the frequency being used – you can even go non line of site with 900 Mhz equipment).