HF 50/100 Series – 50kW and 100kW HF Wide Band Antenna Matching Transformer

The 50kW and 100kW series of broadcast antenna matching transformers are suitable for inclusion in systems where 200 Ohm or 300 Ohm open wire feeds need to be matched to a 50 Ohm coaxial feeder. The units are housed in aluminium tanks, silicone oil cooled to minimise losses and a major feature is broad band operation without the use of ferrite material in the transformer design.

  • 50kW average, Type HF500
  • 100kW average, Type HF1000
  • 100 kW Average + 100% AM Mod
  • Broad band 3-22 MHz
  • Very low loss
  • All-weather unprotected operation

These antennas require small size broad band matching networks and CTS offers the HF 1000 range providing 200 or 300 Ohm balanced outputs.

HF500/HF1000 - High Power Broadcast Antenna Matching TransformerPlease contact us for a quote or for more information

Technical Specs. 
Frequency:3 - 22 MHz
Input Impedance:50 ohms unbalanced
Output Impedance:200 ohm or 300ohm balanced
Power:HF500 - 50kW average + 100% broadcast mod, HF1000 - 100kW average + 100% broadcast mod
Insertion loss:Less than 0.1 dB
VSWR:Less than 1.2:1
Balance ratio:Greater than 26 dB
Load VSWR:2.5:1 max.
Coaxial connectors:3 1/8” and 6 1/8” EIA
Balance terminals:Alumina ceramic M12 thread
Temperature range:-40ºC to +55ºC shade recommended
Weight:450kg gross
High voltage protection:Arcing horns and internal static drain
Configuration:Aluminium tank, silicone oil cooled, pressure relief valve fitted

HF10 30/60 series – 10kW, 30kW and 60kW HF Wide Band Antenna Matching Transformer

Please contact us for a quote or for more information

Technical Specs. 
Frequency:1.5 - 32 MHz
Input Impedance:300 ohms balance
Output Impedance:200 ohm or 600 ohm balance
Power:10 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.
Balance terminals:Alumina ceramic M12 thread
Temperature range:-40ºC to +55ºC
Weight:60kg gross
High voltage protection:Arcing horns
Configuration:Cast aluminium case (LM25). Hermetically sealed. Epoxy paint finish.
Cooling:Natural convection, silicone transformer oil, pressure relief valve fitted.
Shipping dimensions:700 x 600 x 500 mm approx.