Accessories - Baluns, Chokes & UN-UNS

1:1, 4:1, and 6:1 Ratio Voltage Baluns

• All models have SO239 input connector
  (type N-female connectors available upon request)
• 80m thru 10m performance
  (except wideband versions that cover 80m thru 6m)
• Legal limit power handling when matched to a 50 Ohm antenna
• All hardware is stainless steel for long lasting performance
• Insulated wire pigtails to connect to antenna wires
• DC continuity between all connections
• Use on both dipoles and beams
• Use a 1:1 balun for half-wave dipoles and inverted V antennas
• Use a 4:1 balun for folded dipoles and windom type antennas
• Use a 6:1 balun for windom type antennas or matching to 300 Ohm ladder line

Model Nos.	Ratio	Freq. Range	Price
BAL-1:1SS	1:1	80m-10m	$39.95
BAL-4:1SS	4:1	80m-10m	$39.95
BAL-4:1WBSS	4:1	80m-6m	$44.95
BAL-6:1SS	6:1	80m-10m	$44.95

1:1 Ratio Current Baluns

• All models have SO239 input connector
  (type N-female connectors available upon request)
• Consider 160m thru 6m performance or 80m thru 6m performance
• 5000W power handling when matched to a 50 Ohm antenna
• All hardware is stainless steel for long lasting performance
• Insulated wire pigtails to connect to antenna wires
• Use on both dipoles and beams

Model Nos.	Ratio	Freq. Range	Price
RFCB-6U	1:1	80m-6m	$44.95
RFCB-12U	1:1	160m-6m	$59.95

1:1 In-Line RF Choke

• All models have SO239 input connector on both ends
  (type N-female connectors available upon request)
• Consider 160m thru 6m performance or 80m thru 6m performance
• 5000W power handling when matched to a 50 Ohm antenna
• All hardware is stainless steel for long lasting performance
• Use in-line to prevent RF from getting into your shack along the coax

Model Nos.	Ratio	Freq. Range	Price
RFC-8U	1:1	80m-6m	$49.95
RFC-12U	1:1	160m-6m	$59.95

UN-UNS (unbalanced-to-unbalanced)

• UN-UNS are used to feed long wire antennas where a step-up Impedance ratio is needed to match the high Impedance of an end fed half-wave wire
• An UN-UN will work well where the antenna's length is a multiple of a half wave at the lower frequency
• Many UN-UN's are used to feed the half-wave wire but use the feed coax shield for the ground reference. This can cause radiation on the coax which is not good , nor a safe thing to have.
• Adding an in-line RF choke a distance back from the UN-UN is a good thing to do
• We recommend a counterpoise of about 0.05 wavelengths at the lowest frequency
• See our new series of off center fed multiband dipoles which are used for the UN-UNS (Click for Details)
• Standard center fed input connector is a Type-UHF female (SO-239) but Type-N female is also available

Model	Frequency	Power	Price
4:1-UN-UN	7 - 30 MHz.	1000W	$49.95
6:1-UN-UN	7 - 30 MHz.	1000W	$49.95
9:1-UN-UN	7 - 30 MHz.	800W	$54.95