| 50:250 ohm (5:1) CUBE™ Balun, 1.8-61 MHz, 1500 Watts
Purpose. This balun is designed to match 250 ohms balanced to 50 ohms unbalanced up to 1500 watts PEP power from 1.8-61 MHz. It provides conversion from unbalanced 50 ohm coax to a balanced 250 ohm load/antenna feed point and gives a 5:1 impedance step-up to reduce VSWR on the coax feed line. The balun is housed in a 4” x 4” X “2 NEMA weather resistant box with SO-239 coaxial input and a ¼” stud terminals with wing nut on the top for output
This balun is DC grounded and will bleed off static electricity but it is NOT A LIGHTNING ARRESTOR.
Application. For use on Bruce Arrays and similar antennas with balanced 250 ohm feed point requirements.
Use a coax noise filter to reduce noise from any antenna or a line isolator to electrically isolate the coax braid from becoming part of the antenna.