HF500/1000 High Power Broadcast Antenna Matching

HF500/1000 High Power Broadcast Antenna Matching

The 50 kW and 100 kW 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 aluminum tanks, silicone oil cooled to minimize losses and a major feature is broad band operation without the use of ferrite material in the transformer design.

  • 50 kW average, Type HF 500
  • 100 kW average, Type HF 1000
  • 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 SMC offers the HF 1000 range providing 200 or 300 ohm balanced outputs.

Broadband 1.5 – 32 MHz
Very low loss
Heavy duty
Input Impedance
Output Impedance
Insertion loss
Balance ratio
Coaxial connectors
Balance terminals
Temperature range
High voltage protection
3 – 22 MHz
50 ohms unbalance
200 ohm or 600 ohm balance
HF500 – 50kW average + 100% broadcast modHF1000 – 100kW average + 100% broadcast mod
Less than 0.1 dB
Less than 1.2:1
Greater than 26 dB
2.5:1 max.
3 1/8” and 6 1/8” EIA
Alumina ceramic M12 thread
-40ºC to +55ºC
450kg gross
Arcing horns and internal static drain
Aluminium tank, silicone oil cooled, pressure relief valve fitted.

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