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
Magnetic Longwire Balun 9:1 for receiving. - YouTube
9:1 Voltage Unun - Resource Detail - The DXZone.com
Magnetic 9:1 HF BALUN for Beverage antenna Long wire antenna RTL SDR Software radio receiver (software defined radio) FOXWEY
ITA MTFT | Magnetic Longwire Balun 1:9 | 300 W PEP