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.
HF500/1000 Dimensional Drawing
Technical Specification
| Frequency: | 3 – 22 MHz |
| Input Impedance: | 50 ohms unbalance |
| Output Impedance: | 200 ohm or 300ohm balanced |
| Power: | HF500 – 50kW average + 100% broadcast modHF1000 – 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. |