5:1 Baluns/Ununs

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:

CU 5 1500 antenna - 5:1 Baluns/Ununs

Also available as a balanced output – CB-5-1500

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Termination Resistor, 600 Ohm Non-Inductive for T2FD, BBTD, Rhombic, 1-61 MHz, 600 Watts
Termination Resistor, 600 Ohm Non-Inductive for T2FD, BBTD, Rhombic, 1-61 MHz, 600 Watts
Termination Resistor, 600 Ohm Non-Inductive for T2FD, BBTD, Rhombic, 1-61 MHz, 600 Watts
SKU TR-600-600
$99.95
On Sale
Termination Resistor, 500 Ohm Non-Inductive for T2FD, BBTD, Rhombic, 1-61 MHz, 600 Watts
Termination Resistor, 500 Ohm Non-Inductive for T2FD, BBTD, Rhombic, 1-61 MHz, 600 Watts
Termination Resistor, 500 Ohm Non-Inductive for T2FD, BBTD, Rhombic, 1-61 MHz, 600 Watts
SKU TR-500-600
List price $129.95
Save 23%
$99.95
Termination Resistor, 400 Ohm Non-Inductive for Terminated Vee, T2FD, BBTD, Rhombic, V-Beam, 1-61 MHz, 600 Watts
Termination Resistor, 400 Ohm Non-Inductive for Terminated Vee, T2FD, BBTD, Rhombic, V-Beam, 1-61 MHz, 600 Watts
Termination Resistor, 400 Ohm Non-Inductive for Terminated Vee, T2FD, BBTD, Rhombic, V-Beam, 1-61 MHz, 600 Watts
SKU TR-400-600
$99.95
On Sale
Termination Resistor, 2000 Ohm Non-Inductive for T2FD, BBTD, Rhombic, 1-61 MHz, 600 Watts PEP, use 2 in parallel for high power 1K
Termination Resistor, 2000 Ohm Non-Inductive for T2FD, BBTD, Rhombic, 1-61 MHz, 600 Watts PEP, use 2 in parallel for high power 1K
Termination Resistor, 2000 Ohm Non-Inductive for T2FD, BBTD, Rhombic, 1-61 MHz, 600 Watts PEP, use 2 in parallel for high power 1K
SKU TR-2000-600
List price $129.95
Save 23%
$99.95
On Sale
Termination Resistor, 1000 Ohm Non-Inductive for T2FD, BBTD, Rhombic, 1-61 MHz, 600 Watts PEP
Termination Resistor, 1000 Ohm Non-Inductive for T2FD, BBTD, Rhombic, 1-61 MHz, 600 Watts PEP
Termination Resistor, 1000 Ohm Non-Inductive for T2FD, BBTD, Rhombic, 1-61 MHz, 600 Watts PEP
SKU TR-1000-600
List price $129.95
Save 23%
$99.95
Switchcraft 12B Stereo 1/4 Jack - 3 Conductor, panel mount, Vintage Mic Chassis Jack
Switchcraft 12B Stereo 1/4 Jack - 3 Conductor, panel mount, Vintage Mic Chassis Jack
Switchcraft 12B Stereo 1/4 Jack - 3 Conductor, panel mount, Vintage Mic Chassis Jack
SKU SW12B-1
$1.95
Snap On End Fed Feed Line Choke for Non-Resonant and End Fed Half Wave Antennas, RG8X, RG8, up to 38 dB common mode suppression
Snap On End Fed Feed Line Choke for Non-Resonant and End Fed Half Wave Antennas, RG8X, RG8, up to 38 dB common mode suppression
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SKU SOFLC
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5-Pack UHF Female Jack SO-239 Bulkhead Panel Chassis Mount Connector
5-Pack UHF Female Jack SO-239 Bulkhead Panel Chassis Mount Connector
5-Pack UHF Female Jack SO-239 Bulkhead Panel Chassis Mount Connector
SKU SO239-5GP
$14.95
SO-239 Kit (female chassis connector + hardware)
SO-239 Kit (female chassis connector + hardware)
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SKU SO-239 Kit-1/2
$3.95
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Snap On RF Choke/Isolator - 3/8&quot;/9mm cable, 5/10/15 Bead Option, 1-300 MHz
Snap On RF Choke/Isolator - 3/8"/9mm cable, 5/10/15 Bead Option, 1-300 MHz
Snap On RF Choke/Isolator - 3/8"/9mm cable, 5/10/15 Bead Option, 1-300 MHz
SKU SNO31-3/8-5
List price $18.75
Save 4%
$17.95
Dual Band VHF UHF Antenna Feed line Choke - J-Pole, Verticals, Hand Held Beams, mobile antennas - Choose 1/4&quot;, 1/2&quot;, 3/4&quot; cable size, 100-500 MHz
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 MHz
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 MHz
SKU SNO31-1/4-4UHFVHF
$14.95
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Snap On RF Choke/Isolator - 1/2&quot;/12.7mm cable -5/10/15 Bead Option, 3-300 MHz
Snap On RF Choke/Isolator - 1/2"/12.7mm cable -5/10/15 Bead Option, 3-300 MHz
Snap On RF Choke/Isolator - 1/2"/12.7mm cable -5/10/15 Bead Option, 3-300 MHz
SKU SNO31-1/2-5
List price $29.95
Save 13%
$25.95
On Sale
Slip On Feed Line Choke/Isolator - 1/4&quot;/6mm coax cable, RG-58/LMR240/RG8X, 1-100 MHz
Slip On Feed Line Choke/Isolator - 1/4"/6mm coax cable, RG-58/LMR240/RG8X, 1-100 MHz
Slip On Feed Line Choke/Isolator - 1/4"/6mm coax cable, RG-58/LMR240/RG8X, 1-100 MHz
SKU SLO31-1/4-5
List price $24.95
Save 28%
$17.95
Introductory Price
SIGNALSQUARE RF Dectector, 60 Hz - 1.2 GHz, Miliwatts to Kilowatts, Light Detector and Optional Audio Output, No Battery!
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SKU SIGNALSQUARE-L
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SIGNALPEN(TM) PENCIL SIZE RF DETECTOR LIGHT, 60 Hz to 1.2 GHz, Miliwatts to Kilowatts, Direct Contact or Inductive Detector, No Battery! Fits in Shirt Pocket!
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SIGNALCUBE RF Detector, 60 Hz - 1.2 GHz, Miliwatts to Kilowatts, Light Detector, Easy Antenna Check, No Battery!
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SKU SIGNALCUBE
$59.95
Simple Dipole Feed Line Choke - RG8X - RFI Range: 1-100 MHz
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SKU SDFLC
$10.00
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Super Choke - RFI Range: 1.8-54 MHz, -26 dB Common Mode Noise Reduction, 5 KW PEP, RG213/LMR400 - 3 inch ID Ring
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SABRE 50:100 (2:1) CUBE™ Balun (1.8-31 MHz), 2KW Top Studs Output
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RG-8X Coax Jumper Cable with PL-259&#39;s on each end - 6 feet
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List price $19.95
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$17.95
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RG-8X Coax cable with PL-259&#39;s on each end - 50 feet
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RG-8X Coax Jumper Cable with PL-259&#39;s on each end - 3 feet
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RG-8X Coax cable with PL-259&#39;s on each end - 100 feet
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RG-400 Coax Jumper Cable with PL-259&#39;s on each end - 6 inch pigtail, Double Shield, High Power
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RG-400 Coax Jumper Cable with PL-259&#39;s on each end - 3 feet, Double Shield, High Power
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