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
FSB61-1/4, ID=1/4", RFI Range 200-2000 MHzProduct DetailsInitial Permeability (@ 10KHz): 125Material: NiZnMax cable size - in/mm: .25/6.3OD (A) - in/mm: 1.22/14.3ID (B) - in/mm: .26/6.6Length (C) - in/mm: 1.55/39.4Z (ohms per bead - single turn 100 MHz): 230Z ohms (per bead - single turn 250 MHz): 355Z (ohms per bead - single turn 1000 MHz): 420Ferrite Snap On, ID = .26 in/6.6mm, Mix 61
Case lot size is 196 units
FSB61-1/4, ID=1/4", RFI Range 200-2000 MHz
Product Details
Initial Permeability (@ 10KHz): 125
Material: NiZn
Max cable size - in/mm: .25/6.3
OD (A) - in/mm: 1.22/14.3
ID (B) - in/mm: .26/6.6
Length (C) - in/mm: 1.55/39.4
Z (ohms per bead - single turn 100 MHz): 230
Z ohms (per bead - single turn 250 MHz): 355
Z (ohms per bead - single turn 1000 MHz): 420
Ferrite Snap On, ID = .26 in/6.6mm, Mix 61
Case lot size is 196 units