Tallysman manufactures a series of high performance and economically priced RF amplifiers. Inline Amplifiers Amplifiers for Multiple Constellations (GPS, BeiDou, GLONASS, Galileo) and Signals Low Noise Economical Model TW120 Image Bandwidth 1555 – 1590 MHz Supply Voltage 2.7 – 10 V Gain 25 dB Model TW125B Image Bandwidth 1150 – 1750 MHz Supply Voltage 2.7 – 10 V Gain 28 dB Model TW127 Image Bandwidth 1559 – 1610 MHz Supply Voltage 3 to 10 VDC Nominal Gain 25 dB Model TW141 Image Bandwidth 1150 – 1750 MHz Supply Voltage 4.75 – 10 V Gain 40 dB