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
FSB31-1.5, ID=1.465", RFI Range 1-300 MHzProduct DetailsInitial Permeability (@ 10KHz): 1500Material: MnZnMax cable size - in/mm: 1.394/35.4OD (A) - in/mm: 2.445/62.1ID (B) - in/mm: 1.465/37.2Length (C) - in/mm: 2.5/63.5Z (ohms per bead - single turn 1 MHz): 60Z (ohms per bead - single turn 5 MHz): 90Z (ohms per bead - single turn 10 MHz): 150Z (ohms per bead - single turn 25 MHz): 190Z (ohms per bead - single turn 100 MHz): 490Z ohms (per bead - single turn 250 MHz): 530Note this "split bead" comes in two halves which are tie wrapped or taped together. Due to the longer length of the split bead halves, the impedance is higher than other similar mix split beads. Useful for large bundles of wire or cables or coaxial feed lines.
Price shown is for the 2 parts of the ferrite
This item is not stock, please allow up to 2 weeks for delivery depending on quantity and availability.
Note this "split bead" comes in two halves which are tie wrapped or taped together. Due to the longer length of the split bead halves, the impedance is higher than other similar mix split beads. Useful for large bundles of wire or cables or coaxial feed lines.
Price shown is for the 2 parts of the ferrite
This item is not stock, please allow up to 2 weeks for delivery depending on quantity and availability.