• 6kW High Power HexBeam Balun
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RF Guru

5kW ICAS Dual Core High Power HexBeam 1:1 Current Balun or Choke

5kW ICAS Dual Core High Power HexBeam 1:1 Current Balun or Choke

€206,00 EUR
€206,00 EUR
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Connector
Complementary: Stainless Steel (RVS / INOX 316) Mounting Kit available — use the small version for this choke.
All our products are handmade, and fulfilment times may vary depending on order volume. Please allow 2–3 weeks for your order to be completed and shipped.

Designed specifically for HexBeam and upper-HF applications, this 30–10 m dual-core current choke provides superior isolation across the higher amateur bands — and it even extends smoothly through 6 m. Built on a stacked dual-core architecture and sealed inside a rugged polycarbonate enclosure with HV coating, custom gaskets, and a decompression valve, it’s ready for permanent outdoor use in high-power stations. All performance data below is based on real, verified measurements under load.

Related reading:
Baluns in a Nutshell
Why “Common-Mode” Is the Most Abused Term in Ham Radio
How Much Choking Do You Really Need — for RX and TX?

Optimized for HexBeam & Upper HF

This choke is ideal as a feedline isolator for HexBeams, Yagis, and multiband verticals operating from 30 m to 10 m — and including 6 m. It suppresses common-mode currents that can distort patterns, detune beams, or raise your noise floor. A 30 cm coax pigtail (PL-259) is factory-installed for direct connection to your antenna feedpoint, and the choke’s main housing can be ordered with either a PL-259 or N-type connector to match your feedline system.

30–10 m Dual-Core Current Choke (5 kW ICAS)

Engineered for broad upper-HF coverage and consistent isolation from 30 through 10 m — plus effective suppression through 6 m. Perfect for HexBeam installations where both broadband impedance and outdoor durability are critical. Impedance and CMR figures are conservative, based on actual field and lab measurements.

Band Choking Impedance (Ω) Common‑Mode Rejection (dB)
30 m 1.90 kΩ 37.6 dB
20 m 1.25 kΩ 34.0 dB
17 m 1.30 kΩ 34.3 dB
15 m 1.25 kΩ 34.0 dB
12 m 1.10 kΩ 32.9 dB
10 m 1.00 kΩ 32.0 dB

Maximum ICAS/CCS Power Ratings

Connector Type 160–40 m Band 30–10 m Band 6–2 m Band Limiting Factor
PL-259 / UHF ≈ 2.7 kW ICAS ≈ 1.3 kW ICAS ≈ 0.6 kW ICAS Connector
Type-N ≈ 10 kW ICAS ≈ 5 kW ICAS ≈ 2 kW ICAS Coax
7/16 DIN ≈ 10 kW ICAS ≈ 5 kW ICAS ≈ 2 kW ICAS Coax

Construction Highlights

  • Dual-core ferrite stack for extended magnetic and thermal headroom
  • High-voltage internal coating to prevent corona discharge under QRO load
  • Fully sealed polycarbonate housing with precision silicone gaskets (IP-rated)
  • Integrated decompression valve for reliable outdoor pressure equalization
  • Factory-installed 30 cm coax pigtail with PL-259
  • Connector options on box: PL-259 or N-type
  • All impedance and CMR values are conservative, verified under full load
Technical Validation — How We Measure It
All measurements at RF.Guru Lab follow EMC-grade procedures using dual precision current probes: one injects controlled common-mode current into the choke, and the other measures the resulting current at the output. This directly yields the common-mode rejection (CMR) in dB — the true metric of isolation.

Most online “choke measurements” use a differential VNA sweep, which only shows impedance between inner and outer conductors — not actual CM behavior. Our setup isolates and quantifies the common-mode path per EMC industry standards, ensuring the dB values here reflect real-world RF suppression, not simulated artifacts.

Mini-FAQ

  • Q: Is this choke suitable for 6 m?
    — Yes. It maintains up to 3 kΩ common-mode impedance through 54 MHz, ideal for HexBeams and 6 m verticals.
  • Q: What connectors are available?
    — A 30 cm coax pigtail with PL-259 is installed by default. The housing can be ordered with either a PL-259 or N-type connector.
  • Q: Is it weatherproof?
    — Absolutely. The housing is gasket-sealed, HV-coated, and features a decompression valve for outdoor reliability.
  • Q: What does 9 kW ICAS mean?
    — It’s rated for Intermittent Commercial and Amateur Service — suitable for full-legal-limit operation and contest duty cycles.
  • Q: How accurate are the measurements?
    — All listed values are conservative, confirmed under power with standard coax geometry.

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Written by Joeri Van Dooren, ON6URE — RF engineer, antenna designer, and founder of RF.Guru, specializing in high-performance HF/VHF antennas and RF components.
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