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4:1 Unun for Single Wire Verticals 4kw - #4134
4:1 Unun for Single Wire Verticals 4kw - #4134
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4:1 Unun for Single Wire Verticals 4kw - #4134

Manufacturer: Balun Designs
SKU: 4134
Price: $78.95
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4134t - Studs on top
4134s - Studs on sides


 

Heavy duty 5kw, 4:1 unun designed to be used with single wire verticals provides a good alternative to aluminum verticals. Utilizes stacked cores to deliver efficient broadband performance and high power rating across all HF frequencies.

 

New design intended for use with single wire vertical antennas and a wide range antenna tuner. Works best with either 33ft (40-10m) or 43ft (80-10m) of wire in a vertical configuration but just about any length over 24 feet will work (the larger the wire gauge the better) Does not work well as a sloper.

 

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

 

Note: Because of the smaller diameter of a wire vertical, performance will be slightly less than that of larger diameter aluminum or copper tube/pipe.

 

Design Features:

  • Utilizes a design enhanced by Jerry Sevick, W2FMI, the authority on baluns and ununs. This is his 4:1 unun which he created to handle high power.
  • By utilizing toroids with low permeability in a stacked configuration, the low frequencies are provided the necessary inductive reactance.
  • Windings are Thermaleze wire inserted in teflon tubes providing a breakdown voltage of 10,000 volts.
  • Typical insertion loss is less than 0.2 dB
  • Power handling of 5kw upto 54MHz.
  • All Hardware is stainless steel. Studs are 1/4"
  • SO-239 connectors are silver plated with teflon insulation.
  • N connectors and additional mounting options are available in the Accessories section.
  • Much more effective than types with ferrite beads or ferrite bars handles much higher power.
  • Very high efficiency (98-99%).
  • Unun is installed in weatherproof 4" X 4" X 2" NEMA Box which makes an excellent outdoor weatherproof enclosure.

 

 

 

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