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
FSB31-3/8, ID=3/8", RFI Range 1-300 MHzProduct DetailsMPN: FSB31-3/8Initial Permeability (@ 10KHz): 1500Material: MnZnMax cable size - in/mm: .354/9.0OD (A) - in/mm: .933/23ID (B) - in/mm: .354/9Length (C) - in/mm: 1.55/39.4Z (ohms per bead - single turn 1 MHz): 18Z (ohms per bead - single turn 5 MHz): 50Z (ohms per bead - single turn 10 MHz): 81Z (ohms per bead - single turn 25 MHz): 144Z (ohms per bead - single turn 100 MHz): 240Z ohms (per bead - single turn 250 MHz): 270Ferrite Snap On, ID = .354 in/9mm, Mix 31 for RG-8X, cables with OD of 3/8"
On Sale
FSB31-3/8, ID=3/8", RFI Range 1-300 MHz, Bulk Pack of 50FSB31-3/8, ID=3/8", RFI Range 1-300 MHz, Bulk Pack of 50SKU FSB31-3/8-50List price $187.50 Save 20%$149.95
FSB31-3/8, ID=3/8", RFI Range 1-300 MHz
Product Details
MPN: FSB31-3/8
Initial Permeability (@ 10KHz): 1500
Material: MnZn
Max cable size - in/mm: .354/9.0
OD (A) - in/mm: .933/23
ID (B) - in/mm: .354/9
Length (C) - in/mm: 1.55/39.4
Z (ohms per bead - single turn 1 MHz): 18
Z (ohms per bead - single turn 5 MHz): 50
Z (ohms per bead - single turn 10 MHz): 81
Z (ohms per bead - single turn 25 MHz): 144
Z (ohms per bead - single turn 100 MHz): 240
Z ohms (per bead - single turn 250 MHz): 270
Ferrite Snap On, ID = .354 in/9mm, Mix 31 for RG-8X, cables with OD of 3/8"
On Sale
FSB31-3/8, ID=3/8", RFI Range 1-300 MHz, Bulk Pack of 50
FSB31-3/8, ID=3/8", RFI Range 1-300 MHz, Bulk Pack of 50
SKU FSB31-3/8-50
List price $187.50
Save 20%
$149.95