HF200 Series – 20kW HF Wide Band Antenna Matching

HF200 Series – 20 kW HF Wide Band Antenna Matching

The HF200 Series are 20 kW average power transformers suitable for communications or broadcast systems.

The units are housed in a finned cast aluminum tank which provides excellent natural convection cooling. Each casting is subjected to a double vacuum resin impregnation process which ensures complete sealing for the internal low loss silicone cooling oil.

High purity alumina ceramic insulators with arcing horns are fitted as standard and an internal static drain to earth provides additional protection against lightning induced high voltages.

  • Wide band 1.5 to 32 MHz
  • 20 kW average + 100% AM modulation
  • Suitable for communication or broadcast application
  • Very high efficiency
  • All weather unprotected operation

A wide selection of unbalance and balance impedance ratios are available to complement most antenna configurations and enquiries for non-standard arrangements are welcome. The HF200 is a high-quality unit suitable for unprotected operation in any environment.

The HF200 Series supersedes all Minns “Y” types of 20 kW transformers.

Wide band 1.5 – 32 MHz
High frequency
Heavy duty
All-weather
Specification
Frequency
Impedance
Power
Insertion loss
VSWR
Balance ratio
Load VSWR
Coaxial connectors
Balance terminals
Temperature range
Weight
High voltage protection
Configuration
Shipping dimensions
Data
1.5 – 32 MHz
See table below
20 kW average + 100% am modulation
Less than 0.2 dB
Less than 1.2:1 (2 – 30 MHz), Less than 1.3:1 (1.5 – 32 MHz)
Greater than 26 dB
2.5:1 max.
1 5/8″, 3 1/8″ EIA
Alumina ceramic M12 thread
-40ºC to +55ºC
110kg gross
Arcing horns and internal static drain
Cast aluminium case (LM25). Hermetically sealed. Epoxy paint finish.
700 x 600 x 500 mm approx.

Balance Impedance (Ohm)

Unbalanced impedance (ohm)
50
75
100
200
300
370
450
600
50
HF200-55
HF200-57
HF200-510
HF200-520
HF200-530
HF200-537
HF200-545
HF200-560
75
HF200-75
HF200-77
HF200-710
HF200-720
HF200-730
HF200-737
HF200-745
HF200-760

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