Don's Home Hobbies Personal & CB Radio Contact |
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Consumer Reports tests of GMRS worked well in a mall and went up to 1.5 mile in a suburban neighborhood. See Personal Radio in Products. 2. CB can go up to 12 watts for SSB (Single sideband). See radio channel frequencies for CB, Marine, FRS, GMRS The FCC rules and regulations are codified in Title 47 of the Code of Federal Regulations (CFR) the 49 MHz band is used by cordless phones, toys, baby monitors and motorcycle helmet intercomms.
FRS and GMRS
General Mobile Radio Service (GMRS) shares frequencies with FRS and is now commonly included in the FRS handheld radios. Higher power GMRS radios (base station radios with detachable antennas) are also used commercially. This personal radio service uses frequencies in the ultra high frequency (UHF) band, and so does not suffer the interference effects found on citizens' band (CB) at 27 MHz, or the 49 MHz band. They uses frequency modulation (FM) instead of amplitude modulation (AM), and has a greater reliable range than license-free radios operating in the CB or 49 MHz bands. REACT (Raqdio Emergency Associated Citizens Team) are volunteers who monitor channel 9 on CB's and channel 20 on GMRS to report problems by travelers. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
FRS 1
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GMRS 2
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1. FRS Channels 1-7 can be used for GMRS (5 w) 2. Second set of GMRS frequencies is for duplex (repeater) operation. * Nationwide emergency and road information calling. Nationally recognized coded squelch for 675 emergency repeater operation is 141.3 Hz. See Wireless Services at the FCC
Types of Communications:
Installation of Ham and CB radios:
Power Wiring
Anderson Power Pole connectors are popular.
See:
Jeep
CB Stuff
See Channel usage
Power, SSB | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Scanners: Police and other municipal organizations in larger cities are using more sophisticated radios that use trunking primairly in the 800-MHz band. No service is assigned a specific frequency. Each department identified by an ID called a talkgroup. A computer selects the next unused frequency and assigns it to a talkgroup. Scanners which contain computers to handle trunking systems are more expensive.
Glossary: CB - Citizens Band CFR - Code of Federal Regulations CW - Continuous Wave - common usage refers to Morse code FCC - Federal Communications Commission FRS - Family Radio Service GMRS - General Mobile Radio Service PRSG - Personal Radio Steering Group PA - Power amplifier USB - Upper Side Band VOX - Voice operated transmit
Books:
Magazines: Return to Hobbies
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