5:1 CUBE™ Unun – Model CU-5-1500 (50:250 Ohm, 1.8-61 MHz, 1.5KW PEP)
Application. For traveling wave, end fed or portable 20-31 foot vertical antennas the 5:1 unun makes a good transformer for converting 50 ohm coax to a 250 ohm feed point. If you use the antenna on multiple bands, the feed point impedance may not always be 250 ohms and use of the unun at high (>350 ohms) or low (<100 ohms) will require reduced power input or the unun may have its power ratings exceeded and damage to the unun may occur. The (5:1 conversion ratio will change for loads other than 250 ohms unbalanced.
Typical application:
Also available as a balanced output – CB-5-1500
50:800 ohm (16:1) CUBE™ Unun 3-43 MHz - 1KW/2KW PEPProduct DetailsCountry/Region of Manufacture: Made in USAType: Unbalanced outputInput ohms/Output ohms: 50 to 800Frequency Range < 2:1 SWR (MHz): 1KW: 3-43, 2KW: 3-31PEP Power Rating (watts): 1000/2000Insertion Loss (dB): < .2Input Connector: SO-239Output Connector(s): EyeboltTransformer Topology: broadband binocular coreHardware Type: Stainless SteelEnclosure Size: 4" x 4" x 2"Weight (pounds): 3Antenna Compatability: end fed16:1 Ununs are useful between coax and long wires with a load impedance near 800 ohms like a beverage antenna. Shortwave listener antennas also can benefit with the 16:1 unun and it may provide a better match than 9:1 ununs – this means quieter noise levels and stronger signals so you can hear distance stations easier. Output is eyebolt/output on top, ground/counterpoise on side.
Choose 1KW/2KW PEP power option depending on needs.
Custom versions available. 16:1 also available as Balun output.
16:1 Ununs are useful between coax and long wires with a load impedance near 800 ohms like a beverage antenna. Shortwave listener antennas also can benefit with the 16:1 unun and it may provide a better match than 9:1 ununs – this means quieter noise levels and stronger signals so you can hear distance stations easier. Output is eyebolt/output on top, ground/counterpoise on side.
Choose 1KW/2KW PEP power option depending on needs.
Custom versions available. 16:1 also available as Balun output.
