![]() Popular culture embraced CB in television and movies, and the cost of reliable CB equipment became much more affordable during this time. ![]() The mid-1970s saw an explosion of CB radio popularity. Out of all these channels, there is just one reserved for emergency services - frequency 27.065, commonly known as channel 9, is legally reserved for emergency response use. This 11-meter wavelength proved to be very popular, and today there are 40 channels that share the range. This changed in 1958 when the FCC added 23 channels in around the 27 MHz range to make using the CB radio service more accessible. These frequencies began at 460 MHz and went as high as 470 MHz, and most casual users didn’t have the equipment to make use of these frequencies reliably. At first, these designations were less than helpful, as the FCC’s Class A and Class B specifications were hard to reach. Originally created by the FCC in 1945, the CB radio service was given a specific electromagnetic spectrum for average citizens to use to communicate with for personal purposes. History of CB RadioĬB radio has been around for nearly a century. An entire culture has developed among CB radio users, especially when it comes to shorthand, slang, and other lingo. Today, there may be plenty of other options for this such as cell phones, CB radios are still popular to this day. ![]() The song went number one on the charts in the US and abroad and was even made into a movie in 1978.ġ0-4 has shown up in hip-hop lyrics, too, like Ghostface Killah’s 2004 “Beat the Clock,” where he raps: “…ten four, may day-may day / Callin’ all cars, callin’ all cars.” This use is inspired by 10-4 in cop-speak.Citizen’s band radio - more commonly known as just CB radio - has a long history of allowing average people to talk to other nearby radio users. McCall’s 1975 song “Convoy,” where he uses trucker CB radio slang like breaker one-nine (a radio channel used by truckers) and 10-4. The expression 10-4 further spread into popular culture when it was featured in C. Helping to popularize 10-4 in the mainstream was the 1950s TV crime drama Highway Patrol, starring Broderick Crawford, known for starting his conversations on his radio with 10-4. Oh, the ’50s. These handy codes were quickly adopted by others communicating via radio, such as CB (Citizen Band) radio enthusiasts and truckers. 4 was simply chosen to mean “acknowledgement” of a message ( 10-3 meant “stop transmitting” in case you wanted to know). The 10 was used as a placeholder to give the motor-generator time to speed up enough to hear the second part of the code. It took a split second for the motor-generator in the radios to warm up, and so the first syllables of a radio transmission were often lost. ![]() The use of the number 10 before all of the codes was another workaround. The ten-codes were invented to communicate information quickly and clearly. For starters, there were limited police radio channels, so officers couldn’t stay on the line too long or else others wouldn’t be able to get through. In the 1930s, radio technology was still relatively new and limited. Ten-Four Day ~ for decades, Oct 4 has been a day to salute radio operators. 10-4 is an affirmative signal: it means “OK.” The ten-codes are credited to Illinois State Police Communications Director Charles Hopper who created them between 1937–40 for use in radio communications among cops. 10-4 is one of the so-called ten-codes, or radio signals, invented by the Association of Public-Safety Communications Officials-International (APCO).
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