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
FSB75-3/4, ID=3/4", RFI Range 150Khz-10 MHzProduct DetailsCountry/Region of Manufacture: USAInitial Permeability (@ 10KHz): 5000Material: MnZnMax cable size - in/mm: .709/18OD (A) - in/mm: 1.52/38.6ID (B) - in/mm: .74/18.8Length (C) - in/mm: 1.87/47.5Z (ohms per bead - single turn 200 KHz): 30Z (ohms per bead - single turn 500 KHz): 92Z (ohms per bead - single turn 1 MHz): 130Z (ohms per bead - single turn 2 MHz): 81Z (ohms per bead - single turn 5 MHz): 66Ferrite Snap On, ID = .74 in/18.8 mm, Mix 75
Excellent for AC/DC power cables on switching power supplies and data/audio/video cables for AM broadcast, Solar RFI suppression.
Case size is 58 ferrites
Ferrite Snap On, ID = .74 in/18.8 mm, Mix 75
Excellent for AC/DC power cables on switching power supplies and data/audio/video cables for AM broadcast, Solar RFI suppression.
Case size is 58 ferrites