Amazon.com: 3-Pk Outdoor TV Antenna Matching Transformer Balun VHF/UHF/FM 300 To 75 Ohm : Electronics
Coaxial Balun
1:9 Balun 200w Short Wave Balun Ham Long Wire Hf Antenna -sdr 1-56mhz 50 Ohm To 450 Ohms Nox-150 Ma | Fruugo TR
LDG RBA-1 - 1:1 Current Balun
Amazon.com: Balun One Nine v1 - Tiny Low-Cost 1:9 HF Antenna Balun and Unun with Antenna Input Protection for Ham It Up, RTL-SDR, HackRF and Other HF-Capable Radios. Great for DIY Dipole