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Radio sets from before 1920 are rarities, and are probably military artifacts. Sets made prior to approximately 1924 were usually made on wooden breadboards, in small cupboard style cabinets, or sometimes on an open sheet metal chassis. Homemade sets remained a strong sector of radio production until the early 1930s.
Diagram of an inverted-L antenna, a common wire antenna used with crystal radios. The antenna converts the energy in the electromagnetic radio waves to an alternating electric current in the antenna, which is connected to the tuning coil. Since, in a crystal radio, all the power comes from the antenna, it is important that the antenna collect ...
The Wireless Set No. 19 Group, with members virtually worldwide, caters to those who collect, restore and/or operate vintage military communications equipment, with emphasis on the World War II Wireless Set No. 19 radio. Many members are Amateur Radio operators who use the equipment for on-air contacts with others.
In April, the local owners of Price Tower sold an undisclosed amount of historic Frank Lloyd Wright and Bruce Goff artifacts, which are now up for sale by a Texas-based gallery.
The Majestic "Smart Set" line of less expensive, but stylish, table radios was introduced in mid-1933 and enjoyed strong sales. The model 161 (pictured at top) produced in 1933 was a superheterodyne receiver with Art Deco -style chrome decorative trim adorning the loudspeaker grill cloth and a hand-rubbed mahogany cabinet, having a list price ...
This 1920s TRF radio manufactured by Signal is constructed on a breadboard Tuning a TRF receiver, like this 5 tube Neutrodyne set from 1924 with two stages of RF amplification, was a complicated process. The three tuned circuits, controlled by the 3 large knobs, had to be tuned in unison to the new station.
The feedlines feeding radio power from the transmitter to the huge flattop wire antenna are visible, top. A list of early wireless telegraphy radio stations of the Marconi Wireless Telegraph Co. Guglielmo Marconi developed the first practical radio transmitters and receivers between 1895 and 1901.
The set was compact and mounted in a wooden box, type BC-14. The lid of the box held the buzzer circuit, detectors, a screwdriver, two P-11 telephone headsets, spare parts, extra crystals, and an operating manual, “Radio Pamphlet No. 3”. [2] The receiver was intended to be used with antenna type A-2 or A-2-B.