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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 ...
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 ...
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
In this case, the transmitter is normally called a universal remote control duplicator because it is able to copy existing remote controls, while the receiver is called a universal receiver because it works with almost any remote control in the market. A radio remote control system commonly has two parts: transmit and receive.
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]
A remote control locomotive (also called an RCL) is a railway locomotive that can be operated with a remote control. It differs from a conventional locomotive in that a remote control system has been installed in one or more locomotives within the consist, which uses either a mechanical or radio transmitter and receiver system .
A communications receiver is a type of radio receiver used as a component of a radio communication link. This is in contrast to a broadcast receiver which is used to receive radio broadcasts . A communication receiver receives parts of the radio spectrum not used for broadcasting, including amateur, military, aircraft, marine, and other bands.
At the Alpine Museum in Japan there is a model "7307" radio/tape recorder (circa 1981) [4] shot by an American (Roger Holdaway of SpeakerWorks in Orange Ca Archived 2018-08-10 at the Wayback Machine) using a .45-caliber pistol at a distance of 4 feet (approx. 1.22 Meters). The owner, frustrated with the performance of the product, shot the unit ...