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In 1903, the Spanish engineer Leonardo Torres Quevedo introduced a radio based control system called the "Telekino" [6] at the Paris Academy of Sciences. In the same year, he applied for several patents in other countries. [7] [8] It was intended as a way of testing Astra-Torres airship, a dirigible of his own design, without risking human ...
Xilinx Spartan-6 ELAD FDM-S3 [42] Pre-built 9 kHz – 500 MHz 192 kHz – 24.576 MHz 16 N/A No 122.88 MHz/98.304 MHz USB 3.0 Yes No No ? ELAD FDM-DUO [43] Pre-built 10 kHz – 54 MHz (experimental up to 165 MHz) 192 kHz – 6 MHz 16 ? Yes 122.88 MHz 1/8+1 Embedded system + 3x USB 2.0 Yes No No Xilinx Spartan-6 Elecraft KX3 [44] Pre-built or kit
A radio receiver may be a separate piece of electronic equipment, or an electronic circuit within another device. The most familiar type of radio receiver for most people is a broadcast radio receiver, which reproduces sound transmitted by radio broadcasting stations, historically the first mass-market radio application. A broadcast receiver is ...
The TR-6, covering the 50 MHz (6-meter) amateur band, was also introduced in 1968 and was produced for about six years. Because of their small size, the Drake transceivers were widely used for mobile operation, along with the DC-3 or DC-4 power supplies. In 1965, Drake introduced the matching T-4X transmitter and R-4 receiver. [6]
Modern portable shortwave radio receiver with digital frequency display and keypad for direct frequency entry. A shortwave radio receiver is a radio receiver that can receive one or more shortwave bands, between 1.6 and 30 MHz. A shortwave radio receiver often receives other broadcast bands, such as FM radio, Longwave and Mediumwave.
"Wholesale Radio Service" was established in the early 1920s by Abraham Pletman in New York City. Radios sold by the company were trademarked “Lafayette” in July 1931. Following a Federal Trade Commission action in 1935, Wholesale Radio Service became "Radio Wire Television, Inc.". A 1939 company catalog bore the names Radio Wire Television ...
When used to describe aircraft radio cockpit radio systems, the control panel is often called the radio head. In wireless system technologies such as GSM, CDMA, UMTS, LTE, 5G NR this radio equipment is remote to baseband units [1] such as BTS/NodeB/eNodeB/gNodeB or gNB. This equipment is used to extend the coverage of a baseband unit in ...
valve 6 band single conversion AM CW 0.7 1.5 3 6 (6) 19" x 8.75" x 12.5" 14 0 1 [15] AWA AR8 Military .14-20 2RF front-ends superhet 13 4 Bowden cable volume and tune [16] AWA I-C6770 1940 superhet 5 3 [17] AWA C6940 Professional 1940s (.015-.5), 1.4-26 single conversion AM BFO 6 0 1 no [18] AWA I-C8388 Military 10 [19] CAI CR-70 Professional ...