South Midlands Communications Group

HF50 Series - 5kW HF Wide Band Antenna Matching Transformer

HF50 Transformer

The HF50 5kW Series are solid encapsulated and suitable for installation in any orientation.

The transformers are housed in a heavy duty cast aluminium case, vacuum impregnated with epoxy resin and fully hermetically sealed for any military or commercial environment.

  • Wide band 1.5 to 32 MHz
  • 5 kW average, 20kW Peak
  • All weather solid encapsulated
  • Heavy duty cast aluminium case

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 EMF's.

A wide selection of unbalanced and balanced impedance ratios are available to complement most antenna configurations and enquiries for non-standard arrangements are welcome.

The HF50 is a unit of the highest quality and reliability.

Frequency: 1.5 - 32 MHz
Impedance: See table above
Power: 5 kW average, 20 kW peak
Insertion loss: Less than 0.3 dB
VSWR: Less than 1.2:1 (2 - 30 MHz), Less than 1.3:1 (1.5 - 32 MHz)
Balance ratio: Greater than 26 dB
Load VSWR: 2.5:1 max.
Coaxial connectors: 7/8"EIA (Others on request)
Balance terminals: Alumina ceramic M10 thread
Temperature range:  -40ºC to +55ºC
Weight: 38kg gross
High voltage protection: Arcing horns and internal static drain
Configuration: Cast aluminium case (LM25). Hermetically sealed. Epoxy paint finish.
Shipping dimensions: 490 x 410 x 390 mm approx.

 

Balance Impedance (ohm)
Unbalanced impedance (ohm)
50
75
100
200
300
450
600
50
HF50-55
HF50-57
HF50-510
HF50-520
HF50-530
HF50-545
HF50-560
60
HF50-65
HF50-67
HF50-610
HF50-620
HF50-630
HF50-645
HF50-660
75
HF50-75
HF50-77
HF50-710
HF50-720
HF50-730
HF50-745
HF50-760

 

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