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
FSB61-3/4, ID=3/4", RFI Range 200-2000 MHz, Bulk Pack of 10Product DetailsInitial Permeability (@ 10KHz): 125Material: NiZnMax cable size - in/mm: .709/18OD (A) - in/mm: 1.52/38.6ID (B) - in/mm: .722/18.35Length (C) - in/mm: 1.87/47.5Z (ohms per bead - single turn 100 MHz): 360Z ohms (per bead - single turn 250 MHz): 480Z (ohms per bead - single turn 500 MHz): 350Z (ohms per bead - single turn 1000 MHz): 110Ferrite Snap On, ID = .74 in/18.8 mm, Mix 61, 10 pack
FSB61-3/4, ID=3/4", RFI Range 200-2000 MHz, Bulk Pack of 10
Product Details
Initial Permeability (@ 10KHz): 125
Material: NiZn
Max cable size - in/mm: .709/18
OD (A) - in/mm: 1.52/38.6
ID (B) - in/mm: .722/18.35
Length (C) - in/mm: 1.87/47.5
Z (ohms per bead - single turn 100 MHz): 360
Z ohms (per bead - single turn 250 MHz): 480
Z (ohms per bead - single turn 500 MHz): 350
Z (ohms per bead - single turn 1000 MHz): 110
Ferrite Snap On, ID = .74 in/18.8 mm, Mix 61, 10 pack
