Why do (did?) truckers use CB channel 19?”
Channel 9 became reserved for emergency use in the 1970s. Later, channel 19 became the preferred highway channel in most areas as it did not have the adjacent-channel interference problems with channel 9. History In the 1960s, the service was popular for small trade businesses (e.g., electricians, plumbers, carpenters) and transportation services (e.g., taxi and trucking firms). “10 codes” originally used in the public service (e.g., police, fire, ambulance) and land mobile service were used for short acknowledgments. With the advancement of solid state technology (transistors replacing tubes) in the 1970s, the weight, size, and cost of the radios decreased. US truckers were at the head of the boom. Many CB clubs were formed, and a special CB slang language evolved. The prominent use of CB radios in mid- and late-1970s films (see list below), television shows such as The Dukes of Hazzard (debuted 1979), and in popular novelty songs such as C.W. McCall’s “Convoy” (1976) helped to establ
