Tallysman TW120

Tallysman TW120 GPS L1 25dB In-line Amplifier

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The TW120 by Tallysman Wireless is a rugged waterproof, low cost, low noise, low power, narrow band 25dB gain inline amplifier, specially designed to tightly filter and boost weak GPS L1 signals, while maintaining low antenna noise figures.



The TW120 GPS L1 25dB in-line amplifier provides for much longer cable runs from antenna to receiver, for applications such as mast-mount, roof-top and large vehicle installations, without any degradation of system sensitivity.

The TW120 passes DC directly from input to output to support centre conductor DC supply to the antenna, and so avoiding the need for an additional bias source or bias T.


  • GNSS and Telematics Systems
  • Wireless Telecom and Cellular Base Station Timing Applications
  • Commercial and Industrial Timing and Synchronization Applications


  • Very low noise
  • Wide input voltage range, 3 to 10 VDC
  • Powered via antenna coax from receiver
  • 50 Ohm port impedance
  • Cylindrical nickel-plated brass, IP67
    compliant housing
  • Gold-plated 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 voltage supply needed
  • Maintains low antenna LNA noise figure
  • Easy to install – mounting clamp included

Ordering Information

  • TW120 – 25dB gain In-Line Amp with SMA Jack – 32-0120-0
  • TW120 – 25dB gain In-Line Amp with TNC Jack – 32-0120-1