RF Communications

The HF Series Fixed Station Balun Transformers are encased in purpose-designed heavy-duty aluminium casings, featuring either solid impregnation or silicone oil cooling, ensuring reliable performance and durability.

Experience unmatched flexibility with the capability to supply any combination of power and impedance ratio across the frequency spectrum from 10 kHz to 32 MHz. Our comprehensive range offers antenna designers a wide array of options. For specific requirements, additional specifications are available upon request.

Key Features:

  • Broad band coverage from 10 kHz to 2 MHz and 1.5 MHz to 32 MHz, ensuring compatibility with a variety of applications.
  • Power capacities ranging from 400 Watt to 30 kW, meeting diverse power requirements.
  • Exceptional efficiency, ensuring optimal performance in your communication setup.
  • Suitable for all-weather unprotected operation, providing reliability in various environmental conditions.
  • Sturdy cast aluminum housing, offering durability and longevity for prolonged usage.

Our HF Series Fixed Station Balun Transformers have been expertly designed to elevate your communication experience. Whether for professional or recreational use, these transformers deliver reliable results across a wide range of frequencies and power levels.

Balance Ratio: >26 dB
Balance Terminals: Alumina ceramic M10 thread
Coaxial Connectors: ‘N’ type (others on request)
Configuration: Cast aluminium case (LM25). Hermetically sealed. Epoxy paint finish.
Frequency: 1.5 – 32MHz
High Voltage Protection: Arcing horns and internal static drain (NB No internal capacitors fitted.)
Impedance: See table below
Insertion Loss: <0.3 dB
Load VSWR: 2.5 : 1 max
Power: 1kW average, 4kW peak
Shipping Dimensions: 0.425m x 0.3m x 0.15m
Temperature Range: -40°C to +55°C
VSWR: <1.2 : 1 (2 – 30MHz), <1.3 : 1 (1.5 – 32MHz)
Weight: 5kg
Balance Ratio: >26 dB
Balance Terminals: P.T.F.E. M10 thread
Coaxial Connectors: 7/8″, 1 5/8″, 3 1/8″ EIA
Configuration: Cast aluminium case (LM25). Hermetically sealed. Epoxy paint finish.
Cooling: Natural convection, silicone transformer oil, pressure relief valve fitted.
Frequency: 1.5 – 32MHz
High Voltage Protection: Arcing horns and internal static drain
Impedance: See table below
Insertion Loss: <0.2 dB
Load VSWR: 2.5 : 1 max
Power: 10kW average
Shipping Dimensions: 0.7m x 0.6m x 0.5m
Temperature Range: -40°C to +55°C
VSWR: <1.2 : 1 (2 – 30MHz), <1.3 : 1 (1.5 – 32MHz)
Weight: 60kg
Balance Ratio: > 26 dB
Balance Terminals: P.T.F.E. M10 thread
Coaxial Connectors: 1 5/8″, 3 1/8″ EIA
Configuration: Cast aluminium case (LM25). Hermetically sealed. Epoxy paint finish.
Frequency: 1.5 – 32MHz
High Voltage Protection: Arcing horns and internal static drain
Impedance: See table below
Insertion Loss: <0.2 dB
Load VSWR: 2.5 : 1 max
Power: 20kW average
Shipping Dimensions: 0.7m x 0.6m x 0.5m
Temperature Range: -40°C to +55°C
VSWR: <1.2 : 1 (2 – 30MHz), <1.3 : 1 (1.5 – 32MHz)
Weight: 110kg
Balance Ratio: >26 dB
Balance Terminals: P.T.F.E. M10 thread
Coaxial Connectors: 7/8″ EIA (others on request)
Configuration: Cast aluminium case (LM25). Hermetically sealed. Epoxy paint finish.
Frequency: 1.5 – 32MHz
High Voltage Protection: Arcing horns and internal static drain (NB No internal capacitors fitted.)
Impedance: See table below
Insertion Loss: <0.3 dB
Load VSWR: 2.5 : 1 max
Power: 3kW average, 12kW peak
Shipping Dimensions: 0.32m x 0.30m x 0.14m
Temperature Range: -35°C to +55°C
VSWR: <1.2 : 1 (2 – 30MHz), <1.3 : 1 (1.5 – 32MHz)
Weight: 14kg
Balance Ratio: >26 dB
Balance Terminals: P.T.F.E. M10 thread
Coaxial Connectors: 3 1/8″ EIA
Configuration: Cast aluminium case (LM25). Hermetically sealed. Epoxy paint finish.
Frequency: 1.5 – 32MHz
High Voltage Protection: Arcing horns and internal static drain
Impedance: See table below
Insertion Loss: <0.2 dB
Load VSWR: 2.5 : 1 max
Power: 30kW average
Shipping Dimensions: 1m x 0.7m x 0.55m
Temperature Range: -40°C to +55°C
VSWR: <1.2 : 1 (2 – 30MHz), <1.3 : 1 (1.5 – 32MHz)
Weight: 120kg
Balance Ratio: > 26 dB
Balance Terminals: Alumina ceramic M6 thread
Coaxial Connectors: ‘N’ type (others on request)
Configuration: Cast aluminium case (LM25). Hermetically sealed. Epoxy paint finish.
Frequency: 1.5 – 32MHz
High Voltage Protection: Arcing horns and internal static drain (NB No internal capacitors fitted.)
Impedance: See table below
Insertion Loss: <0.3 dB
Load VSWR: 2.5 : 1 max
Power: 400 Watt average, 1600 Watt peak
Shipping Dimensions: 0.22m x 0.15m x 0.12m
Temperature Range: -40°C to +55°C
VSWR: <1.2 : 1 (2 – 30MHz), <1.3 : 1 (1.5 – 32MHz)
Weight: 1.2kg
Balance Ratio: > 26 dB
Balance Terminals: P.T.F.E. M10 thread
Coaxial Connectors: 7/8″ EIA (others on request)
Configuration: Cast aluminium case (LM25). Hermetically sealed. Epoxy paint finish.
Frequency: 1.5 – 32MHz
High Voltage Protection: Arcing horns and internal static drain
Impedance: See table below
Insertion Loss: <0.3 dB
Load VSWR: 2.5 : 1 max
Power: 5kW average, 20kW peak
Shipping Dimensions: 0.49m x 0.41m x 0.39m
Temperature Range: -40°C to +55°C
VSWR: <1.2 : 1 (2 – 30MHz), <1.3 : 1 (1.5 – 32MHz)
Weight: 38kg
Balance Ratio: > 26 dB
Balance Terminals: P.T.F.E. M10 thread
Coaxial Connectors: 3 1/8″ and 6 1/8″ EIA
Configuration: Aluminium tank, silicone oil cooled, pressure relief valve fitted
Frequency: 3 – 22MHZ
High Voltage Protection: Arcing horns and internal static drain
Input Impedance: 50 ohm unbalance
Insertion Loss: <0.1 dB
Load VSWR: 2.5 : 1 max
Output Impedance: 200 ohm or 600 ohm balance
Power: HF500 – 50kW average. HF1000 – 100kW average.
Temperature Range: -40°C to +55°C
VSWR: <1.2 : 1
Weight: 450kg
Balancing Loads: Internal
Configuration: Cast aluminium box, 0.05m x 0.05m x 0.03m solid encapsulation
Connectors: ‘N’, BNC
Frequency: 50kHz – 50MHz
Insertion Loss: <0.5 dB
Isolation: >35 dB
Power: 2 x 2 Watt
Temperature Range: -40°C to +55°C
VSWR: <1.2 : 1
Balancing Loads: Internal
Configuration: Cast aluminium box, 0.05m x 0.05m x 0.03m solid encapsulation
Connectors: ‘N’ BNC
Frequency: 10kHz – 32MHz
Insertion Loss: <0.5dB
Isolation: >35 dB
Power: 2 x 2 Watt
Temperature Range: -40°C to +55°C
VSWR: <1.2 : 1
Balancing Loads: Internal
Configuration: Cast aluminium box, 0.12m x 0.06m x 0.03m solid encapsulation
Connectors: ‘N’ BNC
Frequency: 50kHz – 50MHz
Insertion Loss: <0.5 dB
Isolation: >30 dB
Power: 4 x 1 Watt
Temperature Range: -40°C to +55°C
VSWR: <1.2 : 1
Balancing Loads: Internal
Configuration: Cast aluminium box, 0.12m x 0.06m x 0.03m solid encapsulation
Connectors: ‘N’ BNC
Frequency: 10kHz – 32MHz
Insertion Loss: <0.5 dB
Isolation: >30 dB
Power: 4 x 1 Watt
Temperature Range: -40°C to +55°C
VSWR: <1.2 : 1
AV Power: 1 kWi/ imp: 50 ohm unbalance
Balance Impedance: 200 ohm
AV Power: 1 kWi/ imp: 50 ohm unbalance
Balance Impedance: 300 ohm
AV Power: 1 kWi/ imp: 50 ohm unbalance
Balance Impedance: 370 ohm
AV Power: 1 kWi/ imp: 50 ohm unbalance
Balance Impedance: 450 ohm
AV Power: 1 kWi/ imp: 50 ohm unbalance
Balance Impedance: 50 ohm
AV Power: 1 kWi/ imp: 50 ohm unbalance
Balance Impedance: 600 ohm
AV Power: 1 kWi/ imp: 50 ohm unbalance
Balance Impedance: 75 ohm
AV Power: 1 kWi/ imp: 50 ohm unbalance
Balance Impedance: 800 ohm
AV Power: 150 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 75 ohm
AV Power: 150 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 300 ohm
AV Power: 150 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 370 ohm
AV Power: 150 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 450 ohm
AV Power: 150 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 50 ohm
AV Power: 150 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 600 ohm
AV Power: 150 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 75 ohm
AV Power: 150 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 800 ohm
AV Power: 400 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 200 ohm
AV Power: 400 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 300 ohm
AV Power: 400 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 370 ohm
AV Power: 400 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 450 ohm
AV Power: 400 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 50 ohm
AV Power: 400 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 600 ohm
AV Power: 400 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 75 ohm
AV Power: 400 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 800 ohm
AV Power: 50 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 200 ohm
AV Power: 50 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 300 ohm
AV Power: 50 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 370 ohm
AV Power: 50 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 450 ohm
AV Power: 50 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 50 ohm
AV Power: 50 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 600 ohm
AV Power: 50 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 75 ohm
AV Power: 50 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 800 ohm
AV Power: 1 kWi/ imp: 50 ohm unbalance
Balance Impedance: 200 ohm
AV Power: 1 kWi/ imp: 50 ohm unbalance
Balance Impedance: 300 ohm
AV Power: 1 kWi/ imp: 50 ohm unbalance
Balance Impedance: 370 ohm
AV Power: 1 kWi/ imp: 50 ohm unbalance
Balance Impedance: 450 ohm
AV Power: 1 kWi/ imp: 50 ohm unbalance
Balance Impedance: 50 ohm
AV Power: 1 kWi/ imp: 50 ohm unbalance
Balance Impedance: 600 ohm
AV Power: 1 kWi/ imp: 50 ohm unbalance
Balance Impedance: 75 ohm
AV Power: 1 kWi/ imp: 50 ohm unbalance
Balance Impedance: 800 ohm
AV Power: 400 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 200 ohm
AV Power: 400 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 300 ohm
AV Power: 400 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 370 ohm
AV Power: 400 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 450 ohm
AV Power: 400 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 50 ohm
AV Power: 400 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 600 ohm
AV Power: 400 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 75 ohm
AV Power: 400 Watt i/p imp: 50 ohm unbalance
Balance Impedance: 800 ohm
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