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Balun Designs

Model 4114ocf - 4:1 Balun 1.5 - 54 MHz for OCF Dipole - 5kW


Model 4114ocf - 4:1 Balun 1.5 - 54 MHz for OCF Dipole - 5kW

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Product Description

In an effort to provide a 4:1 current balun with the tolerance of the model 4113 and the choking/isolation attributes of the model 4115, Balun Designs has developed the model 4114ocf.  By utilizing our stacked core technology, we have created a 4:1 current balun that easily tolerates the imbalance caused by the proximity of large structures and metal roofs while still providing good choking impedance, excellent transformation and high power capability.

This balun is an excellent step up from the model 4113 and not as sensitive as the model 4115ocf.  If you like to run high power, but need to erect your OCF dipole with a leg over or near your house, barn, garage or metal building, this is the balun of choice.  The stacked cores double the choking and isolation while retaining the forgiving nature of windings on a single core. 
This same balun is also available in different connector configurations.  Goto the Model 4114  for complete information. 

Click to Enlarge
All testing done with an AIM-4170 uhf Network Analyzer and precision 200 ohm load

Note: This 4:1 current balun is NOT the type used for an Original Windom which has a vertical coaxial radiator. 
Model 4125  should be used to allow RF to pass to the vertical radiator. 

 There are a number of interesting designs for OCF dipoles available on our website under the
Antenna Design links listed in the "
Support & Downloads"  tab at the top of the page


  Core Material   Custom mix low permeability ferrite by Fair Rite Products for maximum bandwidth.
  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 silver plated 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
  Additional Info   Very high efficiency (98-99%). 
  Weight 1lb 6oz

Installation Notes