cb stands for citizens band in cb radio.
cb stands for citizens band in cb radio.
what does cb stand for in cb radio?
citizens band
from the outset, the government attempted to regulate cb radio with license fees and call signs, but eventually they abandoned this approach. enthusiasts rushed for licences when the doors opened at post offices around australia in mid-1977 and by the end of the first quarter of 1978 an estimated 200,000 licences were issued (australia's population in 1978 was 14.36 million). the regulations called for one licence per cb radio. the price for a licence in 1977 was au$25 per year (in mid 1977 the australian dollar exchange rate was au 90 cents to us $1), a not insubstantial amount for the average australian wage-earner. australian cb radio uses am, usb, and lsb modes (no fm) on 27 mhz, allowed output power being 4 watts am and 12 watts ssb. when uhf cb was first legalised the 27 mhz cb band was intended to be closed to australian cbers in 1982 and only the 477 mhz uhf band was to continue, but this did not eventuate. the first 477 mhz cb radio in 1977 was designed and made in australia by philips and was a 40 channel cb called the fm320.
citizens band radio
the first use of wireless communications on the farm was in 1971, when a ham radio hf ssb system was set up. ham radio was used for health and welfare regional communications between mobile ham operators who were on the road with the farm band. the farm net, as the ham radio network was known, evolved into a worldwide daily operations schedule on 21332 khz and 21442 khz upper sideband in the 15-meter band, and a regional schedule on the 40-meter ham band. at the network's peak in 1978, the farm net included over 40 ham radio operators on associated and affinity communities, as well as many hf ssb mobiles. from its main base station, the farm net expanded to cover hf ssb communication links to stations in north america, africa, and europe using a field of tall radio towers on the farm's ridgetop. ham radio operators from the farm volunteered with the plenty international disaster relief operations for the 1976 guatemala earthquake, with the greenpeace anti-whaling campaigns, and many humanitarian response efforts worldwide. ham radio was invaluable for voice communications consultations between doctors and field medical teams, and it included the use of hf slow scan tv for the relatively new concept of telemedicine. the ham radio was also used for technical discussions about alternative sources of energy, a popular topic among the back-to-the-land-movement, especially during the time of the 1970s energy crisis. the farm's ham radio operators also used cb radios, as the cost of cb transceivers had dropped impressively during the mid-1970s. cb radios were widely adopted by the farm for mobile general purpose local communications during this time, while cb radio was starting to become a nationwide craze. this eventually led to the writing of the book "the big dummy's guide to cb radio", which became a non-fiction bestseller. the popularity and sales of "the big dummy's guide to cb radio" fueled the launch of the book publishing company's new printing presses, and provided much-needed income for the farm at a crucial time in its growth. later, the farm's medical and security communications utilized vhf fm handheld two-way radios.
the farm (tennessee)