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.

Specification	Data
Frequency	1.5 – 32 MHz
Impedance	See table below
Power	30 kW average + 100% am modulation
Insertion loss	Less than 0.2 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	3 1/8″ EIA
Balance terminals	Alumina ceramic M12 thread
Temperature range	-40ºC to +55ºC
Weight	120kg gross
High voltage protection	Arcing horns and internal static drain
Configuration	Cast aluminium case (LM25). Hermetically sealed. Epoxy paint finish.
Shipping dimensions	1000 x 700 x 550 mm approx.

Balance Impedance (ohm)

Unbalanced impedance (ohm)	50	75	100	200	300	370	450	600
50	HF300-55	HF300-57	HF300-510	HF300-520	HF300-530	HF300-537	HF300-545	HF300-560
75	HF300-75	HF300-77	HF300-710	HF300-720	HF300-730	HF300-737	HF300-745	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

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