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Balun Designs

Model 4134 - 4:1 Unun for Multiband Verticals & Random Wires - 5kW

$79.95

Model 4134 - 4:1 Unun for Multiband Verticals & Random Wires - 5kW

$79.95
SKU:
4134
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Product Description

Heavy duty 5kW, 4:1 unun designed for use with wire verticals, long wires and monopole verticals. Utilizes stacked cores to deliver efficient broadband performance and high power rating across all HF frequencies. Works well with both internal transceiver and external antenna tuners.  The model 4134u is designed primarily for the Eagle One multiband vertical but can be used anywhere two SO-239 connectors are desired.

This unun is an excellent match for any of the 43 and 31-33 foot multiband verticals including the S9, ZeroFive, MFJ, Eagle One  and DX Engineering vertical antennas allowing the use of full legal limit ++ power.

NOTE: For ground mounted vertical installations, the "s" model (4134s) is strongly recommended. 

Although many customers report very good performance using just a single ground rod, the best performance will come from using at least 4+ ground radials or several elevated radials. In a temporary or emergency situation, a single counterpoise can be used when cut to approximately 1/4 wavelength of the lowest operating frequency.

Specifications


 

  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 bifilar wire pair wound as 4:1 unun.
  Winding Material   Single bifilar winding 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 - 4kW.  
  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%). 
  Will not heat up or saturate at like many of the "less expensive" designs.


Installation Notes