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  2. Family Radio Service - Wikipedia

    en.wikipedia.org/wiki/Family_Radio_Service

    Motorola T5320 FRS handheld radio. The Family Radio Service (FRS) is an improved walkie-talkie radio system authorized in the United States since 1996. This personal radio service uses channelized frequencies around 462 and 467 MHz in the ultra high frequency (UHF) band.

  3. Bowman (communications system) - Wikipedia

    en.wikipedia.org/wiki/Bowman_(communications_system)

    Bowman is the name of the tactical communications system used by the British Armed Forces.. The Bowman C4I system consists of a range of HF radio, VHF radio and UHF radio sets designed to provide secure integrated voice, data services to dismounted soldiers, individual vehicles and command HQs up to Division level.

  4. List of military electronics of the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_military...

    Common Laser Range Finder System (CLRF) binocular rangefinder [156] [157] Elbit Systems: AN/PEQ-14: Integrated Laser White Light Pointer (ILWLP) mounted on pistols: Insight Technology: AN/PEQ-15: Advanced Target Pointer/Illuminator/Aiming Light (ATPIAL) weapon-mounted Infrared (IR) Laser sight: Insight Technology, L3Harris Technologies: AN/PEQ-16

  5. Armstrong Audio - Wikipedia

    en.wikipedia.org/wiki/Armstrong_Audio

    The Armstrong 521 was a stereo hi-fi amplifier from the Armstrong Audio company and was marketed as 2 x 25W amplifier.. It employed germanium AL102 transistors in its output stages and these had a reputation for failure and are now unobtainable although it is possible, with modification to replace these with newer, silicon transistors.

  6. Ultra high frequency - Wikipedia

    en.wikipedia.org/wiki/Ultra_high_frequency

    The IEEE defines the UHF radar band as frequencies between 300 MHz and 1 GHz. [3] Two other IEEE radar bands overlap the ITU UHF band: the L band between 1 and 2 GHz and the S band between 2 and 4 GHz. UHF television antenna on a residence. This type of antenna, called a Yagi–Uda antenna, is widely used at UHF frequencies.

  7. Personal radio service - Wikipedia

    en.wikipedia.org/wiki/Personal_radio_service

    Initially, it used half-watt hand-held FM UHF radios with 14 fixed channels near 462 and 467 MHz. For a time dual-standard FRS and General Mobile Radio Service (GMRS) radios were available, that could be operated without individual licensing on the FRS channels, but which required a license to operate on the GMRS frequencies at a power level ...

  8. High-capacity data radio - Wikipedia

    en.wikipedia.org/wiki/High-capacity_data_radio

    It is a secure wideband 225–450 MHz UHF radio system that provides a self-managing IP-based Internet backbone capability without the need for other infrastructure communications (mobile phone, fixed communications).

  9. Coincidence rangefinder - Wikipedia

    en.wikipedia.org/wiki/Coincidence_rangefinder

    The degree of rotation of the compensator determines the range to the target by simple triangulation. [1] Coincidence rangefinders made by Barr and Stroud used two eyepieces, and may be confused with stereoscopic units. The second eyepiece showed the operator a range scale so the user could range and read the range scale simultaneously. [2] [3]

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