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
FB68-43 - .375" ID, RFI Range RFI Freq: 25-250 MHz, Unun/Balun Range: 1-200 MHzProduct DetailsInitial Permeability (@ 10KHz): 800Material: NiZnMax cable size - in/mm: .375OD (A) - in/mm: .687/17.45ID (B) - in/mm: .375/9.5Length (C) - in/mm: .5/12.7mmZ (ohms per bead - single turn 10 MHz): 40Z (ohms per bead - single turn 25 MHz): 58Z (ohms per bead - single turn 100 MHz): 83Z ohms (per bead - single turn 250 MHz): 100Case/Box lot size: 679Ferrite Slip On Bead, ID = .375in/9.5mm, OD = .687/17.45mm, height = .5/12.7mm, Mix 43 - excellent for small inductors using Mix 43 material or inductive compensation on outputs of baluns or ununs.or RFI suppression from 25-250 MHz
Ferrite Slip On Bead, ID = .375in/9.5mm, OD = .687/17.45mm, height = .5/12.7mm, Mix 43 - excellent for small inductors using Mix 43 material or inductive compensation on outputs of baluns or ununs.or RFI suppression from 25-250 MHz