Model 15133 - 1.5:1 Unun (75 to 50 ohms) 3kW
75 ohms unbalanced to 50 Ohms unbalanced
Unlike Baluns, Unun's (unbalanced to unbalanced) provide impedance transformation for antennas that are naturally unbalanced because of their design configuration. Even though the unun's appear small is size, they are able to handle very high power (3kW continuous - matched/resonant condition) because of their excellent efficiency. This ratio is primarily designed to match unbalanced 50 ohm loads to 75 ohm coax feedlines.
Other unun ratios are available by contacting us via the methods shown in the About Us section.
|Core Material|| Custom mix low permeability ferrite by Fair Rite Products for maximum bandwidth.
Core is coated and sealed for long term durability.
|Winding Type|| Individual core wound with trifilar set configured as 1.5:1 unun.
|Winding Material|| 14 gauge Superior Essex Heavy build polyamideimide Allex 240 Winding Wire.
Windings are inserted into Teflon tubes increasing total breakdown to 10,000 volts.
|Power Rating||1.5 to 35 MHz - 3kW|
|Useable Frequency||1.5 to 35 MHz|
|Insertion Loss||Less than 0.1db|
|Connectors|| SO-239 connectors are gold center conductor with Teflon insulation.
Studs and eyebolts are 1/4 inch.
Alternate connectors and Mounting Options are available in the Accessories section.
|Hardware|| All Stainless Steel
Studs are 1/4 inch
|Enclosure Type|| NEMA rated 4x marine grade junction box for outdoor installations.
Cover utilizes integral neoprene gasket for weatherproof integrity.
|Dimensions||4x4x2 inches for main body of unit|
|Additional Info|| Very high efficiency (98-99%)