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Balun Designs 1:1 3kw Eyebolt

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1:1 Balun 1.5 - 35 Mhz Yagis & Dipollit 3kw.


Perutuu Dr. Jerry Sevick’s (W2FMI) original designs.















  • Construction utilizes specifications of Jerry Sevick, W2FMI, the authority on baluns. His spec utilizes a bifilar Guanella current balun which he modified to provide higher efficiency. By utilizing a new toroid mix and heavier gauge Thermaleze wire, both bandwidth and power handling of his design have been increased.

  • Special mix toroid with low permability allows broad frequency coverage. Toroid is also coated for durablity

  • This balun has significantly higher common-mode impedance and larger effective core area than other similar designs. It is much more effective than types with ferrite rods, ferrite beads or air wound coax baluns. Windings are heavy gauge Thermaleze wire with a minimum of 2000v breakdown voltage each. This is NOT the less expensive enameled wire like many of my competitors use. It may appear similar but both windings are coated with an expensive Polymide covering. One winding is also wrapped in an additional layer of Polyimide tape to ensure a uniform winding impedence of 50 ohms. When combined with the Polyimide tape, total breakdown voltage is increased to over 7500 volts.

  • Typical insertion loss is less than 0.2 dB

  • Power handling of 3kw continuous 7kw intermittent. Use at 54mhz with reduced efficiency (1-2%).

  • SO-239 connectors are silver plated with teflon insulation.

  • All hardware is stainless steel. Studs are 1/4"

  • N connectors, top eyebolt hanger and mounting options are available in accessories.

  • All Baluns are sealed in weatherproof 4" X 4" X 2" Nema Box which makes an excellentoutdoor enclosure.




attachment Product specification (Eng)
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Tuottaja: Wikinggruppen

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