Wirelessly posted (Opera/9.80 (BREW; Opera Mini/6.0.3/27.2354; U; en) Presto/2.8.119 320X240 LG VN530)
There are no frequency ranges that aren't being used in some fashion, by someone, somewhere. Just because you or I or someone else can't hear anyone locally, doesn't mean that a specific frequency or frequency range isn't being used somewhere else, outside of your receiving range.
I found this for the 200-300 Mhz range at:
Radio Spectrum - 174 MHz to 328.6 MHz
As MIB mentioned it shows that there are no gaps in coverage in this range that aren't reserved or assigned by the FCC
198 - 204 MHz
• television channel 11
• Biomedical telemetry devices, 1500 microvolts/meter at 3 meter max.
204 - 210 MHz
• television channel 12
• Biomedical telemetry devices, 1500 microvolts/meter at 3 meter max.
210 - 216 MHz
• television channel 13
• Biomedical telemetry devices, 1500 microvolts/meter at 3 meter max.
216 - 216.880 MHz
• Automated Maritime Telecommunictions System ("AMTS"): Mississippi River and connecting waterways, Gulf of Mexico - Not currently assignable [
• Low Power (100 mw ERP max.) Radio Service (LPRS) (See FCC News Release, July 25, 1996) to include:
• auditory assistance devices for persons with disabilities
• health care assistance devices for persons with illnesses
• law enforcement tracking systems
• point-to-point network control communications for Automated Maritime Telecommunication Systems (AMTS).
• Wildlife and ocean buoy tracking and telemetry
216.880 - 217.0 MHz
• Automated Maritime Telecommunictions System ("AMTS"): Mississippi River and connecting waterways, Gulf of Mexico
• US Navy SPASUR system
• Low Power (100 mw ERP max.) Radio Service (LPRS) (See FCC News Release, July 25, 1996) to include:
• auditory assistance devices for persons with disabilities
• health care assistance devices for persons with illnesses
• law enforcement tracking systems
• point-to-point network control communications for Automated Maritime Telecommunication Systems (AMTS).
• Wildlife and ocean buoy tracking and telemetry
217.0 - 217.080 MHz
• Automated Maritime Telecommunictions System ("AMTS") coast transmit: Mississippi River and connecting waterways, Gulf of Mexico
• US Navy SPASUR system
• Wildlife and ocean buoy tracking and telemetry
217.080 - 218 MHz
• Automated Maritime Telecommunictions System ("AMTS") coast transmit: Mississippi River and connecting waterways, Gulf of Mexico
• Wildlife and ocean buoy tracking and telemetry
218 - 219 MHz
• IVDS (Interactive Video and Data Services)
• Wildlife and ocean buoy tracking and telemetry
219 - 220 MHz
• Automated Maritime Telecommunictions System ("AMTS") ship transmit: Mississippi River and connecting waterways, Gulf of Mexico
• Amateur point-to-point fixed digital message forwarding systems, including intercity packet backbone networks, on a secondary basis
• Summary in Daily Digest. March 17, 1995
• FCC AFFIRMS SECONDARY USE BY THE AMATEUR RADIO SERVICE. January 29, 1996
• Wildlife and ocean buoy tracking and telemetry
220 - 221 MHz
• Land mobile - base stations
221 - 222 MHz
• Land mobile - mobile stations
222 - 225 MHz
• Amateur (1.25 meter band)
225 - 243.00 MHz
• Military
243.00 MHz
• Survival craft stations, ELTs
243.00 - 328.6 MHz
• Military