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1:1 Balun Designs Iso 1:1 5 kW

1 290 kr
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Product Description:



This balun is for those of you with tough RFI, SWR and/or RF in shack problems. Building on the original 1:1 design by Dr. Jerry Sevick, this balun has two (2) stacked cores to maximize choking impedance on HF bands from 1- 54MHz.  By utilizing Mil-Spec coax, the SWR, Transformation and power handling are excellent while providing a choking impedance that exceeds 10,000 ohms.



  • Utilizes specifications of Jerry Sevick, W2FMI, the authority on baluns. This is his Guanella current balun design which he modified to provide higher efficiency. By utilizing a new toroid mix, the bandwidth of his design has been increased.

  • Stacked toroids with low permeability allows broad frequency coverage. Toroid is coated with epoxy paint for added durablity.

  • This Isolation balun has significantly higher common-mode impedance which exceeds 10,000 ohms. The larger core area is much more effective than types with ferrite beads, ferrite bars or wound air-core coax.

  • Windings are Mil Spec 50 ohm coax rated 19kw @ 1mhz, 9kw @ 10 Mhz and 3.5kw @ 50 Mhz. Silver coated braid and center conductor. Solid Teflon dielectric.

  • Typical insertion loss is less than 0.2 dB

  • Power handling of 5kw continuous - 10kw intermittent up to 35 MHz. From 35MHz to 54MHz power limit is 4kw.

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

  • All hardware is stainless steel

  • N connectors and Alternate Mounting Options are available in the Accessories section.

  • Very high efficiency. Will not heat up or saturate like many of the typical cheap current baluns.

  • Balun is installed in weatherproof 4" X 4" X 2" Nema Box which makes an excellent outdoor weatherproof enclosure



Item ID:

attachment Product specification (Eng)
Produced by: Wikinggruppen

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