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
50:100 (2:1) CUBE™ Balun/Unun 1.8-61 MHz, 2KW/5KW, Loop AntennasProduct DetailsCountry/Region of Manufacture: USAType: BALUN or UNUNInput ohms/Output ohms: 50Frequency Range < 2:1 SWR (MHz): 1.8-61PEP Power Rating (watts): 2000/5000Enclosure Size: 4" x 4" x 2"Weight (pounds): 3Antenna Compatability: loops, quads, 100 ohm input antennasHigh Power rated at 2KW/5KW (option) PEP (FT8 mode at 1.5KW for 5KW PEP model)
Broad frequency range of 1.8-61 MHz for < 2:1 SWR into matched load. 5KW model is 1.8-31 MHz
Compact 4" x 4" x 2" (2KW) or 4" x 4" x 2" (5KW) light weight weatherproof enclosure
Quick, easy deployment with either halyard hoist or side mounting tabs
Choice of BALUN (balanced outputs) or UNUN (unbalanced output and ground)
Model CB-2-2000 is a 2:1 (100:50) quad core balun used to translate a 50 ohm input to 100 ohms at RF power levels up to 2000 watts PEP when used with a matched load such as single band delta loop, quad or loop skywire. This assembled balun features a multi-core configuration for increased power handling and flatter frequency response to over 60 MHz. With a matched 100 ohm load the SWR over the frequency range is very consistent from 1.8-61 MHz and SWR is less than 2:1 over the range allowing easy tuning by most radio internal antenna tuners or an external tuner.
High Power rated at 2KW/5KW (option) PEP (FT8 mode at 1.5KW for 5KW PEP model)
Broad frequency range of 1.8-61 MHz for < 2:1 SWR into matched load. 5KW model is 1.8-31 MHz
Compact 4" x 4" x 2" (2KW) or 4" x 4" x 2" (5KW) light weight weatherproof enclosure
Quick, easy deployment with either halyard hoist or side mounting tabs
Choice of BALUN (balanced outputs) or UNUN (unbalanced output and ground)
Model CB-2-2000 is a 2:1 (100:50) quad core balun used to translate a 50 ohm input to 100 ohms at RF power levels up to 2000 watts PEP when used with a matched load such as single band delta loop, quad or loop skywire. This assembled balun features a multi-core configuration for increased power handling and flatter frequency response to over 60 MHz. With a matched 100 ohm load the SWR over the frequency range is very consistent from 1.8-61 MHz and SWR is less than 2:1 over the range allowing easy tuning by most radio internal antenna tuners or an external tuner.
