TW141 GPS 40dB Inline Amplifier

Tallysman TW141 GPS 40dB Inline RF Amplifier

The TW141 GPS 40dB Inline RF amplifier provides for much longer cable runs from any Full GNSS (including L-band) antenna to its receiver, with low current and voltage requirements.



Ideal for applications such as mast-mount, roof-top and large vehicle installations, the TW141 GPS 40dB inline RF amplifier from Tallysman provides for much longer cable runs from any Full GNSS (including L-band) antenna to its receiver, with low current and voltage requirements.

Featuring a a dual-stage LNA with a mid-section SAW filter, the TW141 is a rugged waterproof, low cost, low noise, 40dB gain in-line amplifier, specially designed to boost weak signals across the full GNSS frequency, including L-band, while maintaining low antenna noise figures.

The TW141 passes DC directly from input to output to support centre conductor DC supply to the antenna, and so avoids the need for an additional bias source or bias “T”. It is enclosed in a robust weatherproof cylindrical nickel-plated brass housing (IP67 compliant) and is available with SMA and TNC female connectors.


  • Commercial & Military L-Band Satellite Systems
  • Wireless Telecom & Cellular Base Station Timing Applications
  • GNSS (GPS, GLONASS, Galileo), SBAS & Telematics Systems
  • Commercial & Industrial Timing Applications
  • Commercial & Industrial Synchronization Applications


  • Very low noise: <2 dB
  • <25 mA maximum current consumption
  • Wide input voltage range, 4.5 to 10 VDC
  • Powered via antenna coax from receiver
  • 50 Ohm port impedance
  • Cylindrical nickel-plated brass, IP67 compliant housing
  • Available SMA, TNC, and N-Type jack connectors
  • RoHS and REACH 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
  • 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 TW141 GPS 40dB 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.

TW141 40dB gain In-Line Amp with SMA Jack – 32-0141-00
TW141 40dB gain In-Line Amp with TNC Jack – 32-0141-01
TW141 40dB gain In-Line Amp with N-Type – 32-0141-14 (premium applies)