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
Snap On Sleeve Chokes
Connector already on the cable? Don’t want to remove it? Use Snap On Ferrite split bead kits that clamp over the cable.
SNAP ON Sizes for Heliax and Coax Cable
Shown in the table are the SLIP ON and SNAP ON products for various popular Heliax and coax cables. These are the correct size for making common mode chokes for coaxial cable using either Snap On ferrite beads.
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Dual Band VHF UHF Antenna Feed line Choke - J-Pole, Verticals, Hand Held Beams, mobile antennas - Choose 1/4", 1/2", 3/4" cable size, 100-500 MHzDual Band VHF UHF Antenna Feed line Choke - J-Pole, Verticals, Hand Held Beams, mobile antennas - Choose 1/4", 1/2", 3/4" cable size, 100-500 MHzSKU SNO31-1/4-4UHFVHF$14.95On Sale
Snap On RF Choke - 1/4"/6mm cable, RG58/8X/LMR240, Heat Shrink OptionSnap On RF Choke - 1/4"/6mm cable, RG58/8X/LMR240, Heat Shrink OptionSKU SNO31-1/4-5WList price $24.95 Save 12%$21.95On Sale
Snap On RF Choke/Isolator - 1/2"/12.7mm cable -5/10/15 Bead Option, 3-300 MHzSnap On RF Choke/Isolator - 1/2"/12.7mm cable -5/10/15 Bead Option, 3-300 MHzSKU SNO31-1/2-5List price $29.95 Save 13%$25.95On Sale
Snap On RF Choke/Isolator - 3/8"/9mm cable, 5/10/15 Bead Option, 1-300 MHzSnap On RF Choke/Isolator - 3/8"/9mm cable, 5/10/15 Bead Option, 1-300 MHzSKU SNO-3/8-5List price $18.75 Save 4%$17.95
Snap On Sleeve Chokes
Connector already on the cable? Don’t want to remove it? Use Snap On Ferrite split bead kits that clamp over the cable.
SNAP ON Sizes for Heliax and Coax Cable
Shown in the table are the SLIP ON and SNAP ON products for various popular Heliax and coax cables. These are the correct size for making common mode chokes for coaxial cable using either Snap On ferrite beads.
