TW120 25dB Inline RF Amplifier

Tallysman TW120 GPS L1 25dB In-line Amplifier

The TW120 GPS L1 25dB inline RF amplifier provides for much longer cable runs from an L1/E1/B1 antenna to a receiver.



Ideal for applications such as mast-mount, roof-top and large vehicle installations, the TW120 GPS L1 25dB in-line amplifier from Tallysman provides for much longer cable runs from GPS/QZSS L1, Galileo E1, and BeiDou B1 antennas to their receiver.

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

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”. A clip for mounting is also available.


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


  • Very low noise
  • Wide input voltage range, 3 to 12 VDC
  • Powered via antenna coax from receiver
  • 50 Ohm port impedance
  • Cylindrical nickel-plated brass, IP67 compliant housing
  • Gold-plated connectors
  • RoHS compliant


  • Improves signal response
  • 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 include


Calian GNSS (formerly Tallysman Wireless) offers a warranty of 1-3 years on all of it’s products. The warranty ensures that the products are free from defects of materials or workmanship and conform to Calian’s specifications under normal use. Embedded antennas are covered by a one (1) year standard warranty. All housed antennas and accessories (inline amplifiers, splitters, and bias tees) manufactured after January 1, 2020 are covered by a three-year warranty. The warranty is covered in more detail on the Calian GNSS Warranty page.

Why Buy from Us?

In business since 2004, Canal Geomatics is an authorized dealer for Calian GNSS and has established itself as an industry-leading distributor of high-precision positioning products in North America. Our mission is to find the best solution for each unique application and extend premium support to ensure the long-term success of our customers. We offer both volume and reseller discounts for the majority of our product lines.


The TW120 GPS L1 25dB inline RF amplifier is available through Canal Geomatics. If you would like more information about this product, please feel free to get in touch with us by completing the Request Pricing form.

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