Semirigid, 25-ohm and other special coaxial cable -
What is a "75-ohm antenna?" - The Solid Signal Blog
What is the difference between a 75 Ohm and a 300 Ohm antenna? - Quora
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Fm Antenna For Indoor Stereo Receiver, Ancable Universal 75 Ohm/300 Ohm Fm Am Radio Antenna Kit With Antenna Gender Converter - Tv Antenna - AliExpress