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Amazon.com: Ancable Matching Transformer, 3-Pack Gold Plated - 75 Ohm to 300 Ohm Adapter - UHF/VHF/FM Balun Antenne Transformer Converter Adapters with F Female Jack for TV, Radio, Coax Antenna : Electronics
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DIY 75ohm to 50ohm impedance matching circuit to work at UHF frequencies around 470MHz to 600Mhz - Electrical Engineering Stack Exchange
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