Swordfish 1485KHz AM medium Wave Transmitters (Netherlands)

Swordfish 1 Watt 1485kHz AM Transmitter

The Swordfish 1485 1 Watt AM Transmitter has been designed specifically for the Netherlands market operating on 1485kHz.

Using Class E technology, with extremely linear modulation characteristics, suited for high quality, amplitude modulation.

The modulation range is 0 to 110%, and is optimised for 50% modulation for the Netherlands.

The output is protected from a short circuit to ground, and also has over current and  thermal shutdown to protect the output stage if the antenna is badly tuned.

This product is only available for shipping to the Netherlands

The Swordfish transmitter is ready built and ready to run...at an affordable price...with the performance and features of units costing many times the price...!

The Swordfish employs a crystal controlled frequency synthesizer for accurate tuning and drift free frequency stability. The synthesizer is preset to 1485kHz for the Netherlands.

The Swordfish employs "Class E"  output technology and provides the full 1 Watt carrier,  the modulator stages includes both over current and thermal shutdown.

The modulation stage can provide 0 to 110% modulation and has been optimised for 50% modulation for the Netherlands.

The Swordfish also has a two channel mixer for either Stereo to Mono or twin channel Mono audio sources.

The Swordfish printed circuit board uses a grounding technique that splits the RF and Audio grounds, as well as providing and external grounding point. In addition a new external "universal"power supply provides regulated DC power to the transmitter, supplied with county specific power leads for the EU.


  • Frequency: 1485 kHz
  • Power Output:  1 Watt
  • Output Protection: Short Circuit and Thermal
  • Modulation: 0 to 110% (optimised for 50%)
  • Audio input: Mono or Stereo signal
  • Audio connector: 3.5mm Jack Socket
  • Antenna: 3 Metre Loaded Vertical Antenna (or suitable alternative 50 Ohm)
  • Antenna connector: RCA Phono or BNC
  • Crystal controlled: 9KHz Channels
  • Built in Antenna and Modulation monitor
  • Power Input: 15 VDC at < 400mA (Regulated)
  • Power connector: 2.1mm coaxial (tip positive)
  • External Ground Connections
  • Devices: 4 x IC, 2 x Transistor and 3 x MOSFET
  • Compliance: Compliant with Netherlands regulations for 1 Watt transmitter running on 1485kHz.

Fully built and tested, and supplied with "universal" switch mode power supply, standard 3 meter wire antenna and audio cable.

  • Fully Built and Tested: High Quality PCB, Plastic CASE to IP56
  • AC Power Adapter: Power Supply 12-15V DC 90-240V AC 50-60 Hz
  • Audio Cables and Basic Antenna included.
  • Stereo 3.5mm jack to twin RCA (Phono)


This product is only available for shipping to the Netherlands, for use in the Netherlands for a “laagvermogen AM” (LPAM) license granted by Agentschap Telecom.

All specifications subject to change without notice