Icom IC-R20 instruction manual General aviation frequencies, Cable TV IRC, Wireless Microphones

13 FREQUENCY TABLE

DGeneral aviation frequencies

Frequency	Description
121.500	Emergencies
122.000	Flight Advisory Service
122.200	Flight Service Stations
122.700	Unicom— Uncontrolled airports
122.725	Unicom— Private airports
122.750	Unicom— Air-to-air communications
122.800	Unicom— Uncontrolled airports
122.900	Search & rescue training, & uncontrolled airports
122.950	Unicom— Controlled airports
123.000	Unicom— Uncontrolled airports
123.025	Helicopters— Air-to-air communications
123.050	Unicom— Heliports
123.075	Unicom— Heliports
123.100	Search & Rescue
123.300	Flight Schools
123.450	Air-to-air communications (unofficial)
123.500	Flight Schools
123.600	Flight Service Stations— Uncontrolled airports
148.125	Civil Air Patrol Repeaters— Secondary
148.150	Civil Air Patrol Repeaters— Primary
156.300	Aircraft-to-ship— safety
156.400	Aircraft-to-ship— commercial
156.425	Aircraft-to-ship— non-commercial
156.450	Aircraft-to-ship— commercial
156.625	Aircraft-to-ship— non-commercial
156.900	Aircraft-to-ship— commercial
243.000	Military Emergency “Guard”
255.400	Flight Advisory Service
257.800	Civilian Towers
311.000	SAC Primary
321.000	SAC Secondary
381.800	USCG— Primary

D Cable TV (IRC)				(unit: MHz)
CH		Frequency		Remarks
		range
2– 13		54–216	(same as broadcast VHF)
14– 22		120–174	Mid band	Ch. A–I
23– 36		216–300	Super band	J–W
37–	53	300–402	Hyper band	AA–QQ
54– 64		402–468
65– 94		468–648	(Ultra band)
95– 99		90–120	Low band	A5–A1
100–125		648–804	(Ultra band)

DWireless Microphones

169.445 MHz

169.505 MHz

170.245 MHz

170.305 MHz

171.045 MHz

171.105 MHz

171.845 MHz

171.905 MHz

*Power limited to 1/20 watt. These frequencies are also used at drive-in win- dows at some fast-food restaurants.

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