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some kind of analog transmitter like CB to handle it.
silabs based rfm22b with 100mw @432mhz has no problem with 2-5km.
If you're a technician, operating in the 70 centimeter band, you can theoretically use up to 200 Watts of power!
Not quite, at least in the US (Im not sure about Canada). Operation of model craft is limited to 1 Watt of output, but that can still get you to 20 miles or so with a nice antenna.
Right -- unlicensed! The idea was that if you got a Technician HAM radio operator's license, and your application falls within the permitted uses, then you can use Technician class transmission power in the 70 centimeter band, and I haven't found anything saying that the power limitation is less than 200 Watts in that case (except the normal "use no more than necessary to establish and maintain contact.")
§ 97.215 Telecommand of model craft.An amateur station transmitting signals to control a model craft may be operated as follows:(a) The station identification procedure is not required for transmissions directed only to the model craft, provided that a label indicating the station call sign and the station licensee's name and address is affixed to the station transmitter.(b) The control signals are not considered codes or ciphers intended to obscure the meaning of the communication.(c) The transmitter power must not exceed 1 W.