Good ol' CB Radio
The Engineering Web
Review of what CB Radios are and if they are still useful.
Everyone has heard about the CB (the 11 meter kind) radio popularized in the 1970s by the romaticized trucking industry and movies like "Smokey and the Bandit."
|The Classic Cobra 148||Base Station with classic D104 Mic|
The original Citizen Band frequency allocation from the FCC is in the 27MHz band. Cheap radios, AM modulation and license free operation made this a very popular communication for mobile users like truckers, and civic minded groups like REACT International who provide volunteer radio communications for events.
It is still around and is still strong, but the original CB band has degenerated into something less useful than it once was.
Also, because of the long wavelength, CB antennas (good ones anyway) are large by nature. The best antennas are from five to nine feet in length.
If you travel on the American highways, having a cheap CB radio in your car and a K40 five foot mag mount antenna on your roof is a smart move. Truckers are still the knights of the highway, and help can be found quickly if you can call them on their party line radio system - the CB radio.
|9||27.0650 MHz||Emergency use primarily. Monitored in some areas by "REACT" and/or other volunteers.|
|17||27.1650 MHz||Sometimes used by truckers in the western US states|
|19||27.1850 MHz||"Breaker 1 9" Yes, this is the classic trucker's channel (You might not want to let your kids listen)|
|23||27.2550 MHz||This use to be the highest CB channel - in the "Smokey and the Bandit" days ;-)|