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  2. 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 ...

  3. 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.

  4. 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.

  5. Personal radio service - Wikipedia

    en.wikipedia.org/wiki/Personal_radio_service

    Two frequency bands available: VHF-FM (142–143 MHz VHF CB) and UHF-FM (476–477 MHz UHF CB). Indonesia allows 40 channels from 476.425 MHz to 477.400 MHz at 25 kHz channel spacing. It is the same channel plan as the original 40 channel Australia/New Zealand UHF CB allocation. Indonesia also has a 60-channel VHF-FM service available from 142. ...

  6. High-frequency direction finding - Wikipedia

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

    High-frequency direction finding, usually known by its abbreviation HF/DF or nickname huff-duff, is a type of radio direction finder (RDF) introduced in World War II. High frequency (HF) refers to a radio band that can effectively communicate over long distances; for example, between U-boats and their land-based headquarters.

  7. 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.

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

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

    VHF/UHF/SATCOM two-way, multi-mode voice and data radio communication system: E-8 Joint STARS: Rockwell Collins: AN/ARC-231: Skyfire VHF/UHF/SATCOM two-way, multi-mode voice and data radio communication system: BAE Systems: AN/ARC-232: Very High Frequency (VHF)/Ultra high frequency (UHF) radio communication system: Raytheon

  9. List of Mullard–Philips vacuum tubes - Wikipedia

    en.wikipedia.org/wiki/List_of_Mullard–Philips...

    EC71/5718 – Subminiature UHF triode up tp 1 GHz, for use as an oscillator in the 500 MHz range, 8-pin all-glass wire-ended; EC80/6Q4 – VHF Triode up to 500 MHz; EC81/6R4 – UHF oscillator triode; EC84/6AJ4 – High-mu triode; EC86/6CM4 – UHF triode, PC86/4CM4 with a different heater; EC88/6DL4 – UHF triode, PC88/4DL4 with a different ...

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