L-COM Premium 75 Ohm Adapter F male to BNC female V7C00002
50 ohm Matching adapter – Cybershaft Web Shop
Amazon.com: Fancasee (2 Pack Gold Plated) 75 Ohm to 300 Ohm UHF/VHF/FM Matching Transformer Converter Adapter with F Type Female Coax Coaxial Connector Plug Jack for Cable Wire Antenna TV : Electronics
2 X Push-on Antenna Matching Transformer 300/75 Ohm Tv F Coax Adapter - Tv Antenna - AliExpress