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A covert listening device, more commonly known as a bug or a wire, is usually a combination of a miniature radio transmitter with a microphone. The use of bugs, called bugging, or wiretapping is a common technique in surveillance , espionage and police investigations.
The antenna may be enclosed inside the receiver's case, as with the ferrite loop antennas of AM radios and the flat inverted F antenna of cell phones; attached to the outside of the receiver, as with whip antennas used on FM radios, or mounted separately and connected to the receiver by a cable, as with rooftop television antennas and satellite ...
Transoceanic wireless telegraph stations were large high powered stations with huge antenna structures, with output power of 100 kW to one megawatt. Industrial countries built worldwide networks of these stations to exchange telegram traffic with other nations at intercontinental distances and communicate with a country's overseas colonies.
Tozo T6 True Wireless Earbuds Bluetooth Headphones, $24 with on-page coupon (was $30), amazon.com Beats Solo3 Wireless On-Ear Headphones, $130 (was $200), amazon.com Tagry Bluetooth Wireless ...
The Thing, also known as the Great Seal bug, was one of the first covert listening devices (or "bugs") to use passive techniques to transmit an audio signal. It was concealed inside a gift given by the Soviet Union to W. Averell Harriman , the United States Ambassador to the Soviet Union , on August 4, 1945.
A broadcast transmitter is an electronic device that radiates radio waves modulated with information content intended to be received by the general public. Examples are a radio broadcasting transmitter which transmits audio (sound) to broadcast radio receivers (radios) owned by the public, or a television transmitter, which transmits moving images to television receivers (televisions).
A personal FM transmitter is a low-power FM radio transmitter that broadcasts a signal from a portable audio device (such as an MP3 player or a smartphone) to a standard FM radio. Most of these transmitters plug into the device's headphone jack and then broadcast the signal over an FM broadcast band frequency, so that it can be picked up by any ...
WZAZ-FM, now on 105.7 FM, was rebranded as "Channel Z 105.7" with a modern rock format. On June 6, 2000, WZAZ-FM relocated its transmitter closer to Columbus and became WFJX, a classic rock outlet branded "The Fox". A listeners petition to "Bring Back Channel Z" was started after the station switched to 1970s and 1980s rock, but nothing ...
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