If you transmit high power, but need to erect your antenna with a leg over or near your house, barn, garage, metal building/roof or other structure, this is the balun of choice. Our unique design provides increased power handling, doubles the choking impedance and isolation while retaining the forgiving properties of single core designs. This balun is an excellent step up from the model 4113 and is not sensitive to high power reflected RF like the model 4115.
Important Note: This balun is designed for and intended for use with antennas that are subject to a compromised install as described above and used with high power (800-1500 watts). If your antenna is in the clear with no roof lines or structures to worry about, the models 4115 or 4116 would be better choices.
If you use ladder line or twin lead for your antenna, this balun can be installed remotely allowing you to run a short length of coax into your tuner or transceiver. This type of installation will keep stray RF (common to ladder line) out of your shack while retaining the low loss efficiency of ladder line for your antenna.
Only one application where this balun is not recommended. When building or replacing the balun at the feedpoint of a Carolina Windom that incorporates a vertical coaxial radiator, a voltage balun like our model 4125 should be used so RF will pass to the vertical radiator.
|Core Material|| Custom mix low permeability ferrite by Fair Rite Products for maximum bandwidth.
Large 2.4 inch cores are coated and sealed for long term durability.
|Winding Type||Stacked cores with wire pairs wound as 4:1 current balun.|
|Winding Material|| 2 bifilar windings of 14 gauge Heavy build polyamideimide Allex 240 Winding Wire.
Windings are inserted into Teflon tubes increasing total breakdown to 10,000 volts.
|Power Rating|| 1 to 35 MHz - 5kW, 7kW intermittent. 35 to 54 MHz - 5kW.
All ratings based on resonant load. High SWR will reduce power handling ability.
|Useable Frequency||1 to 54 MHz|
|Insertion Loss||Less than .02db|
|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|
| 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
Dimensional Drawing of Standard Enclosure
|Additional Info|| Very high efficiency.
Will not heat up or saturate at like many of the "less expensive" designs.