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  2. Discone antenna - Wikipedia

    en.wikipedia.org/wiki/Discone_antenna

    The discone antenna has a useful frequency range of at least 10 to 1. [2] [3] When employed as a transmitting antenna, a properly constructed discone is just as efficient as an antenna designed for a more limited frequency range. The extra bandwidth comes from the controlled taper and large termination radius of the cone.

  3. General Mobile Radio Service - Wikipedia

    en.wikipedia.org/wiki/General_Mobile_Radio_Service

    TIDRADIO TD-H5 GMRS radios. The General Mobile Radio Service (GMRS) is a land-mobile FM UHF radio service designed for short-range two-way voice communication and authorized under part 95 of the US FCC code. It requires a license in the United States, but some GMRS compatible equipment can be used license-free in Canada. The US GMRS license is ...

  4. Antenna rotator - Wikipedia

    en.wikipedia.org/wiki/Antenna_rotator

    Heavy-duty ham rotators are designed to turn extremely large, heavy, high frequency beam antennas, and cost hundreds or possibly thousands of dollars. In the center of the reference picture, the accompanying image includes an AzEl installation rotator, so named for its controlling of both the azimuth and the elevation components of the ...

  5. Antenna types - Wikipedia

    en.wikipedia.org/wiki/Antenna_types

    Although no real antenna can be exactly isotropic, a few antennas are built to be as near to isotropic as possible; they are used for emergency backup antennas and for test equipment for other antennas: Because the received and transmitted signal strength is the same in (almost) every direction, they work without any need for them to be any ...

  6. Personal radio service - Wikipedia

    en.wikipedia.org/wiki/Personal_radio_service

    MURS is often used for data transmissions as well as portable and mobile voice communications, due to the external high-gain antenna provision, MURS offers the possibility of greater range than FRS. As with CB, FRS and GMRS, there are reports of users using higher-than-legal power levels on the MURS frequencies. [19]

  7. List of amateur radio transceivers - Wikipedia

    en.wikipedia.org/wiki/List_of_amateur_radio...

    15 GMRS two-way channels 8 GMRS repeater channels 130–179 (RX only) ... and Kenwood AT-250 automatic antenna tuner (right) Other series include the 100, 500, and ...

  8. Radio masts and towers - Wikipedia

    en.wikipedia.org/wiki/Radio_masts_and_towers

    A mast radiator or mast antenna is a radio tower or mast in which the whole structure is an antenna. Mast antennas are the transmitting antennas typical for long or medium wave broadcasting. Structurally, the only difference is that some mast radiators require the mast base to be insulated from the ground.

  9. Pan-American television frequencies - Wikipedia

    en.wikipedia.org/wiki/Pan-American_television...

    The Pan-American television frequencies are different for terrestrial and cable television systems. Terrestrial television channels are divided into two bands: the VHF band which comprises channels 2 through 13 and occupies frequencies between 54 and 216 MHz, and the UHF band, which comprises channels 14 through 36 and occupies frequencies between 470 and 608 MHz.

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