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  2. List of the United States Army fire control and sighting ...

    en.wikipedia.org/wiki/List_of_the_United_States...

    This is a list of United States Army fire control, and sighting material by supply catalog designation, or Standard Nomenclature List (SNL) group "F".The United States Army Ordnance Corps Supply Catalog used an alpha-numeric nomenclature system from about the mid-1920s to about 1958.

  3. High-frequency direction finding - Wikipedia

    en.wikipedia.org/wiki/High-frequency_direction...

    The basic concept used a loop antenna, in its most basic form simply a circular loop of wire with a circumference decided by the frequency range of the signals to be detected. When the loop is aligned at right angles to the signal, the signal in the two halves of the loop cancels out, producing a sudden drop in output known as a "null".

  4. Direction finding - Wikipedia

    en.wikipedia.org/wiki/Direction_finding

    A portable, battery operated GT-302 Accumatic automatic direction finder for marine use. Radio direction finding, radio direction finder, or RDF, was once the primary aviation navigational aid. (Range and Direction Finding was the abbreviation used to describe the predecessor to radar. [2])

  5. AN/ARC-182 - Wikipedia

    en.wikipedia.org/wiki/AN/ARC-182

    Available accessories include remote controls, transmit power amplifiers, antennas, and ground support equipment. [6] It has been largely replaced by the AN/ARC-210 series in U.S. systems. [ 7 ] The ARC-210 is an improved version of the ARC-182, adding jam-reisistant SINCGARS capability to communicate with Army radios for close air support.

  6. MFJ Enterprises - Wikipedia

    en.wikipedia.org/wiki/MFJ_Enterprises

    MFJ Enterprises was an American manufacturer specializing in a wide range of products for the amateur radio market. The company focuses on station accessories, including antenna tuners and antenna switching equipment. MFJ was founded in 1972 by Martin F. Jue. As of 2014, the company was recognized as the largest producer of amateur radio ...

  7. 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.

  8. Ultra high frequency - Wikipedia

    en.wikipedia.org/wiki/Ultra_high_frequency

    Ultra high frequency (UHF) is the ITU designation [1] for radio frequencies in the range between 300 megahertz (MHz) and 3 gigahertz (GHz), also known as the decimetre band as the wavelengths range from one meter to one tenth of a meter (one decimeter).

  9. Klystron - Wikipedia

    en.wikipedia.org/wiki/Klystron

    The simplest klystron tube is the two-cavity klystron. In this tube there are two microwave cavity resonators, the "catcher" and the "buncher". When used as an amplifier, the weak microwave signal to be amplified is applied to the buncher cavity through a coaxial cable or waveguide, and the amplified signal is extracted from the catcher cavity.

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