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2. Covert listening device - Wikipedia

   en.wikipedia.org/wiki/Covert_listening_device

   The Great Seal bug was hidden in a copy of the Great Seal of the United States, presented by the Soviet Union to the United States ambassador in Moscow in 1946 and only discovered in 1952. The bug was unusual in that it had no power source or active components, making it much harder to detect—it was a new type of device, called a passive ...

3. The Thing (listening device) - Wikipedia

   en.wikipedia.org/wiki/The_Thing_(listening_device)

   The antenna was capacitively coupled to the post via its disc-shaped end. The total weight of the unit, including the antenna, was 1.1 ounces (31 grams). The length of the antenna and the dimensions of the cavity were engineered in order to make the re-broadcast signal a higher harmonic of the illuminating frequency. [6]

4. Vehicle audio - Wikipedia

   en.wikipedia.org/wiki/Vehicle_audio

   Some head units have built-in stereo amplifiers. Other car audio systems use a separate stand-alone amplifier. Every amplifier has a rated power level sometimes noted on the head unit with the built-in amplifier, or on the label of a stand-alone unit. Coaxial speakers: These are the most common type of car speakers and are often factory-installed.

5. KELA (AM) - Wikipedia

   en.wikipedia.org/wiki/KELA_(AM)

   The event was broadcast on 70 affiliate stations under the Mutual Broadcasting System, operating on 1440 kilocycles, powered at 500 watts over a 185 foot (56 metres) antenna. [8] After the enactment of North American Regional Broadcasting Agreement (NARBA) in 1941, the station switched to its current dial position of 1470 kHz, powered at 1,000 ...

6. Transmitter hunting - Wikipedia

   en.wikipedia.org/wiki/Transmitter_hunting

   Transmitter hunting (also known as T-hunting, fox hunting, bunny hunting, and bunny chasing), is an activity wherein participants use radio direction finding techniques to locate one or more radio transmitters hidden within a designated search area.

7. Mobile radio - Wikipedia

   en.wikipedia.org/wiki/Mobile_radio

   A transit bus may have a ruggedized antenna, which looks like a white plastic blade or fin, on its roof. Some vehicles with concealed radio installations have antennas designed to look like the original AM/FM antenna, a rearview mirror, or may be installed inside windows, or hidden on the floor pan or underside of a vehicle.

8. Animal Stories, Videos, Photos and Heroics - AOL.com

   www.aol.com/animals

   Get a daily dose of cute photos of animals like cats, dogs, and more along with animal related news stories for your daily life from AOL.

9. John F. Kennedy assassination Dictabelt recording - Wikipedia

   en.wikipedia.org/wiki/John_F._Kennedy...

   John F. Kennedy. A Dictabelt recording from a motorcycle police officer's radio microphone stuck in the open position became a key piece of evidence cited by the House Select Committee on Assassinations (HSCA) in their conclusion that there was a conspiracy behind the assassination of John F. Kennedy on November 22, 1963.