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
FB102-43 - 1/2" ID/12.8mm, RFI Range 25-300 MHzProduct DetailsMPN: FB102-43Initial Permeability (@ 10KHz): 850Material: NiZnMax cable size - in/mm: .5/12.6OD (A) - in/mm: 1.02/25.9ID (B) - in/mm: .505/12.8Length (C) - in/mm: 1.125/28.6Z (ohms per bead - single turn 1 MHz): 15Z (ohms per bead - single turn 5 MHz): 60Z (ohms per bead - single turn 10 MHz): 91Z (ohms per bead - single turn 25 MHz): 145Z (ohms per bead - single turn 100 MHz): 235Z ohms (per bead - single turn 250 MHz): 275Case/Box lot size: 212Ferrite Slip On Bead, ID = .505in/12.8mm, Mix 43, 1 piece, 212 per case - make excellent bead baluns/chokes with shrink wrap exterior for 1/2" cable
FB102-43 - 1/2" ID/12.8mm, RFI Range 25-300 MHz
Product Details
MPN: FB102-43
Initial Permeability (@ 10KHz): 850
Material: NiZn
Max cable size - in/mm: .5/12.6
OD (A) - in/mm: 1.02/25.9
ID (B) - in/mm: .505/12.8
Length (C) - in/mm: 1.125/28.6
Z (ohms per bead - single turn 1 MHz): 15
Z (ohms per bead - single turn 5 MHz): 60
Z (ohms per bead - single turn 10 MHz): 91
Z (ohms per bead - single turn 25 MHz): 145
Z (ohms per bead - single turn 100 MHz): 235
Z ohms (per bead - single turn 250 MHz): 275
Case/Box lot size: 212
Ferrite Slip On Bead, ID = .505in/12.8mm, Mix 43, 1 piece, 212 per case - make excellent bead baluns/chokes with shrink wrap exterior for 1/2" cable