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
50:50 (1:1) CUBE™ Ladder Line/Beam to Coax Balun, 1.8-61 MHz, 1.5KW, G5RV/ZS6BKW/Dipole/BeamProduct DetailsMPN: CB-1-1500TSCountry/Region of Manufacture: USAInput ohms/Output ohms: 50 ohms in, 50 - 150 ouhms outputFrequency Range < 2:1 SWR (MHz): 1.8-61 MHzPEP Power Rating (watts): 1500Input Connector: UHF or NOutput Connector(s): top studsHardware Type: Stainless Steel output connectorsEnclosure Size: 4 x 4 x 2Antenna Compatability: G5RV/ZS6BKW/Dipole/balanced outputThe lower powered version of our popular CB-1-5000, the CB-1-1500TS Balun is a 50 ohm to 50 ohm, quad core feed line choke designed to provide high choking impedance between a balanced ladder line feed line (zepp, G5RV/ZS6BKW, extended double zepp, etc.) and short 50 ohm coax feed line (to antenna tuner) at a power of 1500 watts PEP from 1.8 to 61 MHz. The CB-1-1500TS is configured as a Guanilla transmission line transformer with balanced outputs (current balun configuration). It is best used when ladder line impedance seen at the end of the ladder line to balun connection is close to 50-150 ohms. Enclosure box is 4″ x 4″ x 2″. Typical choking impedance range is 1K-10K ohms from 1-61 MHz and common mode suppression is 30 dB..
Typical ZS6BKW multi-band antenna with CB-1-1500 or CB-1-5000
N Connector versions are made to order, email for quantity production times
The lower powered version of our popular CB-1-5000, the CB-1-1500TS Balun is a 50 ohm to 50 ohm, quad core feed line choke designed to provide high choking impedance between a balanced ladder line feed line (zepp, G5RV/ZS6BKW, extended double zepp, etc.) and short 50 ohm coax feed line (to antenna tuner) at a power of 1500 watts PEP from 1.8 to 61 MHz. The CB-1-1500TS is configured as a Guanilla transmission line transformer with balanced outputs (current balun configuration). It is best used when ladder line impedance seen at the end of the ladder line to balun connection is close to 50-150 ohms. Enclosure box is 4″ x 4″ x 2″. Typical choking impedance range is 1K-10K ohms from 1-61 MHz and common mode suppression is 30 dB..
Typical ZS6BKW multi-band antenna with CB-1-1500 or CB-1-5000
N Connector versions are made to order, email for quantity production times
