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  2. Two-way radio - Wikipedia

    en.wikipedia.org/wiki/Two-way_radio

    Naval air traffic controller communicates with aircraft over a two-way radio headset A variety of portable handheld two-way radios for private use. A two-way radio is a radio transceiver (a radio that can both transmit and receive radio waves), which is used for bidirectional person-to-person voice communication with other users with similar radios, [1] in contrast to a broadcast receiver ...

  3. SCR-536 - Wikipedia

    en.wikipedia.org/wiki/SCR-536

    The SCR-536 is often considered the first of modern hand-held, self-contained, "handie talkie" transceivers (two-way radios). It was developed in 1940 by a team led by Don Mitchell, chief engineer for Galvin Manufacturing (now Motorola Solutions) and was the first true hand-held unit to see widespread use. [1]

  4. AN/PRC-148 - Wikipedia

    en.wikipedia.org/wiki/AN/PRC-148

    The AN/PRC-6809 MBITR Clear is a variant of the MBITR, made available without encryption. While the PRC-148 includes US Type 1 capabilities in all versions, the PRC-6809 uses Level III Data Encryption Standard, making it available to police, firefighters, and militaries unable to obtain International Traffic in Arms Regulations (ITAR) approval.

  5. List of radios - Wikipedia

    en.wikipedia.org/wiki/List_of_radios

    The RCA model R7 Superette superheterodyne table radio. This is a list of notable radios, which encompasses specific models and brands of radio transmitters, receivers and transceivers, both actively manufactured and defunct, including receivers, two-way radios, citizens band radios, shortwave radios, ham radios, scanners, weather radios and airband and marine VHF radios.

  6. EF Johnson Technologies - Wikipedia

    en.wikipedia.org/wiki/EF_Johnson_Technologies

    EF Johnson Technologies, Inc. is a two-way radio manufacturer founded by its namesake, Edgar Frederick Johnson, in Waseca, Minnesota, United States in 1923. [1] Today it is a wholly owned subsidiary of JVCKenwood of Yokohama, Japan. EF Johnson Technologies offers a wide range of equipment for use by law enforcement, firefighters, EMS, and military.

  7. Interruptible foldback - Wikipedia

    en.wikipedia.org/wiki/Interruptible_foldback

    The IFB is a special intercom circuit that consists of a mix-minus program feed sent to an earpiece worn by talent via a wire, telephone, or radio receiver (audio that is being "fed back" to talent) that can be interrupted and replaced by a television producer's or director's intercom microphone. [14]

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