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
WiNRADiO WR-LWA-0130 Long Wire Adapter
Longwire Antenna Balun Project (Low Power)
9:1 Magnetic Longwire Balun / Unun – M0UKD – Amateur Radio Blog
IW7EHC Web Site
Unun 9:1
9:1 Magnetic Longwire Balun / Unun – M0UKD – Amateur Radio Blog
Unun 9:1
50:450 ohm (9:1) Balun or Unun Core Kit, .5-32 MHz, 1000 watts PEP, end fed/Ladder Line, T2FD antenna
Chinese HF20A longwire antenna | DD5LP / G8GLM / VK2JI blog
Long Wire Antenna 1:9 Balun for 3-50 MHz (by F4HWK) : 4 Steps (with Pictures) - Instructables