VHF Narrow Band FM 2 Watt multi channel transmitter

Frequency:Standard: 144.000 - 144.775MHz

The QPT transmitter module offers a 2 watt RF output VHF radio link, in either a robust aluminium extruded casing, or a smaller footprint PCB mounted shield can. This unit is ideally suited to applications where existing lower powered transmitters provide insufficient range. The QPT1 transmitter is a multi-channel, narrowband design, suitable for licensed and unlicensed VHF allocations, FCC part 90 operation, and the 2M amateur band. Together with a matching LMR1 or RX1M receiver a one-way radio data link can be achieved over a distance of well over 10km (with a suitable antenna).


  • PLL synthesizer with TCXO
  • Data rates up to 5 kbps for standard module
  • Usable range over 10km
  • Conforms to EN 300 220-3 and EN 301 489-3
  • Re-programmable via RS232 interface

Technical Summary

  • Operating frequency: 144.000 - 144.775 (25KHz steps)
  • Any 2MHz segment in 135- 175MHz
  • 16 channels selected by parallel interface
  • or 32 channels by serial command
  • Transmit power: 2 W (+33dBm) nominal (1 watt version available)
  • Supply range: 12V (11 – 15V)
  • Current consumption: 550mA typ.
  • Data bit rate: 5kbps max
  • Size: 68 x 55 x 15mm (pcb mounted version)
    83 x 64 x 30 mm (extrusion case version)
    (dimensions do not include connectors)


  • Amateur radio
  • MURS units
  • Industrial telemetry and telecommand
  • High-end security systems
  • APRS systems
  • Vehicle data up/download
  • ROV/machinery controls