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Direct To Home Receivers:
The transmission of a radio program is a costly process involving complex equipment and the skills of many people, regardless of whether the transmission is from a local station to its audience or from a network studio to its affiliated stations. A local station uses its broadcasting equipment to put programs on the air direct to home receivers. A network studio distributes its programs to affiliated stations by means of telephone lines. These programs are received by each local station and then sent to its transmitter, which broadcasts the signals through the air to local home receivers. See also section 11—Radio Communications Systems.Position information can be displayed as measured time differences which the operator uses to plot his position on a chart that has been overprinted with Loran-C lines of position. Most sets have two displays, allowing for a simultaneous readout of the two time differences required for a fix. Often a receiver will automatically make measurements on three or four station pairs and display these additional readings sequentially. Now, however, nearly all Loran receivers include a microprocessor that gives a direct readout in latitude and longitude. They will also provide additional information similar to that described above for GPS receivers
Radio broadcasting to the home began in 1920. It originated in the work of amateurs. Prominent among the hobbyists was Frank Conrad, a Westinghouse engineer who began a series of broadcasts from his Garage near Pittsburgh, Pa., in 1919. In September 1920 a Pittsburgh department store mentioned Conrad's broadcasts in an advertisement for some primitive radio receivers. The store's receivers were promptly sold out.
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