Narrow band 400mW transmitter 70TX-E

The synthesizer controlled FM power transmitter 70TX-E is an absolut high end solution with an excellent performance / price relation in the 400mW class. The small sized module is completely conform to ETS 300086. A wide voltage range and its low power consumption combined with the small size makes the module ideal for portable and mobile applications.

Available for a wide frequency range, primarely for the european ISM band from 433.05 to 434.79 MHz, the modul allows an operation on 139 radio channels, each 12.5 kHz apart. The module is also available for the frequency range from 410 to 510 MHz.

The internal microcontroller converts an external 8 bit wide information into a serial data stream for the synthesizer frequency adjustment. No complicate programming is necessary.

The integrated standby function allows a very short startup time if needed. The combination with our receiver-modules 70RX-M1 or 70RX-S1 offers the user a perfect radio system with very long distance communication at simplex or half-duplex. Together with our remote control unit FSM24 you can reach 4000 m and more at free sight.


  • Narrow band multi channel power transmitter
    with professional licence EN 300113
  • Up to 256 channels
  • Up to 400mW output power
  • Typical range 4000m
  • Small size
  • Less current consumption
  • Data rate DC - 5kHz (up to 9600 Bd)
  • Suitable for analog and digital data
  • Compliance to R&TTE ( 99/5/EG )


  • Remote control systems
  • Industrial applications
  • Telemetry systems
  • Alarms
  • Security systems
Transmitter 70TX-E with SMA-plug
Transmitter 70TX-E
Transmitter 70TX-E with SMA plug


Communication Simplex
Frequency range 433.0625 - 434.7875 MHz    ( 12.5/25 kHz raster
  optional 410 - 510 MHz and spacing selectable
Number of channels 139 channels (Standard ISM); max. 256 channels
Output power 250 mW / 24 dBm at 50 Ω / 5V
  400 mW / 26.0 dBm at 50 Ω / 6V
Modulation FM narrow band    (analog and digital)
Data input level 5 VPP (TTL)   
Deviation ± 2.5 kHz  (± 300 Hz)    by Sinus with 5 VPP
Data rate DC - 5 kHz (up to 9600 Bd)
Temperature range -25°C . . . +75°C
Supply Voltage 5 - 8 V   (max. 4.6 - 12 V, 8-12 V only with low duty cycle)
Supply Current Standby:      20 mA (± 3 mA)                
  Transmit:   360 mA (± 30 mA) at 5V                380 mA (± 30 mA) at 6V
Dimensions 51.8 x 31.6 x 15 mm  (with Lashes 61.8 x 31.6 x 15 mm)
Weight 29 g
Material Stainless steel with M3 mounting lashes
Antenna connector SMA     optional SMB- or MCX
Permissions R&TTE (EN 300113)  for  Europe (433.0625 - 434.7875 MHz)

Data sheets 70TX-E (400mW, multi channel) ----> replaced by 70TX-E2

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