9kW High Power Dual Core 1:1 Balun For Beams or Rotary Dipoles

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.

Function

• 1/1 High Power Current BALUN for installation on the boom of a beam or on a top mast below a rotary dipole.
• Wideband version with superior common-mode current rejection.
• Drastically reduces coaxial cable sheath currents, thus avoiding RF feedback during transmission.
• Ensures that in RX mode, common-mode noise originated in your environment is effectively isolated from the signal path.

Mechanical Characteristics

• Optimized 61 mm diameter toroidal ferrites
• Heat resistant teflon coaxial cable with high breakdown voltage.
• Professional 50 Ohms N-connector or SO239 connector. (IP64 after sealing with self- vulcanizing tape or equivalent).
• Stainless steel M6 antenna connections. Stainless steel type 316 More info.
• Waterproof (IP64) and shock proof polycarbonate UV resistant enclosure. More info.
• Weight: +/- 500 g.

Electrical properties

• Conservatively rated 1/1 transmission line transformer.
• Operation principle: Coaxial Common-Mode Choke.
• Very high common-mode impedance. (Substantially higher than what’s obtainable with the “beads over coax” approach).
• Max. power:
• 9000 W PeP @ VSWR < 2.0/1 (ICAS)
• 5000 W PeP @ VSWR < 2.0/1 (CCS)
• 2500 W PeP @ VSWR < 2.0/1 (DIGITAL FT8/FT4)
• For ICAS and CCS power definitions, More info
  
  
• Deployable frequency range: 1.5 to 50 MHz.
• Low HF variant: optimized for 1,5 – 15 MHz.
• Mid HF variant: optimized for 3 – 30 MHz.
• High HF variant: optimized for 5 – 50 MHz.
  
  
• Insertion Loss: < 0.05 dB
• Intrinsic VSWR : < 1.15 / 1 at the frequency range edges. 

General BALUN user installation guide & safety instructions