HF300 Series – 30kW HF Wide Band Antenna Matching

The HF300 Series are 30 kW average power silicone cooled transformers suitable for communication or broadcast systems.

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 aluminum 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 HF300 is a unit of the highest quality and reliability.

Frequency1.5 – 32 MHz
ImpedanceSee table below
Power30 kW average + 100% am modulation
Insertion lossLess than 0.2 dB
VSWRLess than 1.2:1 (2 – 30 MHz), Less than 1.3:1 (1.5 – 32 MHz)
Balance ratioGreater than 26 dB
Load VSWR2.5:1 max.
Coaxial connectors3 1/8″ EIA
Balance terminalsAlumina ceramic M12 thread
Temperature range-40ºC to +55ºC
Weight120kg gross
High voltage protectionArcing horns and internal static drain
ConfigurationCast aluminium case (LM25). Hermetically sealed. Epoxy paint finish.
Shipping dimensions1000 x 700 x 550 mm approx.
Balance Impedance (ohm)
Unbalanced impedance (ohm) 5075100200300370450600
50HF300-55 HF300-57 HF300-510 HF300-520 HF300-530 HF300-537HF300-545 HF300-560
75HF300-75 HF300-77 HF300-710 HF300-720 HF300-730 HF300-737HF300-745 HF300-760

Download the technical data sheet for this product

The data sheet contains:

◉  Complete technical specifications, including input/output, temperature range, frequency, power and more
  Technical drawings and size dimensions

Contact our sales team

Want to learn more about this particular product? Contact our friendly and knowledgeable sales team today. They will be happy to answer any questions you have and advise you on the best solution for your requirements.