Tallysman TW125

TW125 Low Current/Low Voltage 1.2 to 1.8 GHz 25dB In-line Amplifier

The TW125 has been replaced by an improved version – the TW125B. All orders for the TW125 will be fulfilled with the improved inline amplifier. If at all possible, please order with the Part Number for the TW125B.



The TW125 provides for much longer cable runs from antenna to receiver, for applications such as mastmount, large vehicle and timing systems, without degradation of system sensitivity.

Its low loading allows for both the antenna and the TW125 in-line amplifier to be powered by the GNSS receiver. The TW125 passes DC supply to the antenna, therefore not requiring additional hardware such as bias-T, power cable and power supply.


  • All GNSS Signals GPS, GLONASS, Galileo & SBAS
  • Commercial, Industrial and Military Telematics Systems
  • Wireless and Telecom Timing and Synchronization Applications


  • Low current/low voltage
  • Very low noise
  • Wide input voltage 3 to 10 Volts
  • Nickel-plated brass, IP67 compliant housing
  • Powered via antenna coax from receiver
  • 50 Ohm port impedance
  • Available SMA & TNC jack connectors
  • RoHS compliant


  • Improves signal reception
  • Enables extended cable runs
  • Avoid installation of costly low-loss cable
  • Fits in-line with antenna cable
  • No external DC power supply required
  • Easy to install mounting clamp included

Ordering Information

  • TW125 25dB gain In-Line Amp with SMA Jack – 32-0125-0
  • TW125 25dB gain In-Line Amp with TNC Jack – 32-0125-1
  • TW125 – 27dB gain In-Line Amp with N-Type female 33-0125-14 (premium applies)