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MFJ Enterprises, founded in 1972 by Martin F. Jue, is a manufacturer of a broad range of products for the amateur radio market. They specialize in station accessories, such as antenna tuners and antenna switching equipment. As of 2014, MFJ was responsible for manufacturing more amateur radio products than any other company in the world. [2]
Martin F. Jue is an American business personality, inventor and founder/owner of several companies, including MFJ Enterprises, Hy-Gain, Cushcraft, [2] Ameritron, Vectronics and others, all of which manufacture products for the amateur radio industry. He holds numerous patents on specialized technology, especially in the area of T network field ...
An antenna analyzer measuring SWR and complex impedance of a dummy load. MFJ-269, MFJ Enterprises Inc. An antenna analyzer or in British aerial analyser (also known as a noise bridge, RX bridge, SWR analyzer, or RF analyzer) is a device used for measuring the input impedance of antenna systems in radio electronics applications.
An amateur radio license is valid only in the country where it is issued or in another country that has a reciprocal licensing agreement with the issuing country. [42] [43] In some countries, an amateur radio license is necessary in order to purchase or possess amateur radio equipment. [44]
A terminal node controller (TNC) is a device used by amateur radio operators to participate in AX.25 packet radio networks. It is similar in function to the Packet Assembler/Disassemblers used on X.25 networks, with the addition of a modem to convert baseband digital signals to audio tones. [1]
Others build their equipment from scratch (called homebrewing) using both modern and vintage-era components. [15] Rock star Joe Walsh is an advocate of amateur radio and an avid vintage gear collector, maintaining nine complete vintage stations in his home, including a Collins broadcast transmitter. [16] [17]
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