This high power matching transformer is designed for Multi-Band End-Fed Half-Wave antennas, suitable for both home and field use. By simply adding some antenna wire, you can cover multiple bands. For instance, attaching 40m of wire allows for operation on 80, 40, 20, 15, and 10 meters.
Depending on how long your coaxial feed is to the antenna balun may have the option of adding a earth ground or counterpoise to the screw connection on the other side of the balun box. This could be a piece of hanging wire but is likely better to go to a ground stake below the balun. This should keep stray RF currents off the coaxial shield. This video may help with explaining this also: https://youtu.be/0Zm-SfLzW-k?si=DN0_JSTZfgMTT6Jo
End Fed Half Wave - Tips & Tricks
Technical Features:
- Type: 49:1 Unun
- Frequencies: 3.5-30 MHz
- Maximum Power: 1KW Power Handling (SSB PEP). Digital Data Modes Maximum 200 watts
- Insertion loss: 0.3 to 1.65 dB depending on frequency
- Connection: SO239