South Midlands Communications Group

HF30 Series - 3kW HF Wide Band Antenna Matching Transformer

HF30 Transformer

The HF30 Series of antenna matching transformers are solid encapsulated heavy duty units suitable for the most arduous environmental conditions and designed for installation in any orientation.

The transformers are housed in a cast aluminium case, vacuum impregnated with epoxy resin and finished in epoxy paint for added protection. High purity alumina ceramic insulators with arcing horns are fitted as standard. An internal static drain to earth provides additional protection against lightning induced EMF's.

  • Wide band 1.5 to 32 MHz
  • 3 kW average, 12kW PEP
  • All weather solid encapsulated
  • Heavy duty cast aluminium case

For added EMP proof operation, no capacitors are used in the transformer circuit. 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 HF30 is a unit of the highest quality and reliability.

Frequency: 1.5 - 32 MHz
Impedance: See table above
Power: 3 kW average, 12kW 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: 14kg gross
High voltage protection: Arcing horns and internal static drain (NB No internal capacitors fitted.)
Configuration: Cast aluminium case (LM25). Hermetically sealed. Epoxy paint finish.
Shipping dimensions: 320 x 300 x 140 mm approx.
Balance Impedance (ohm)
Unbalanced impedance (ohm)
50
75
100
200
300
450
600
50
HF30-55
HF30-57
HF30-510
HF30-520
HF30-530
HF30-545
HF30-560
60
HF30-65
HF30-67
HF30-610
HF30-620
HF30-630
HF30-645
HF30-660
75
HF30-75
HF30-77
HF30-710
HF30-720
HF30-730
HF30-745
HF30-760

 

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