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 TW125B TW127 TW141 Image Bandwidth 1555 – 1590 MHz 1150 – 1750 MHz 1559 – 1610 MHz 1150 – 1750 MHz Supply Voltage 2.7 – 10 V 2.7 – 10 V 3 to 10 VDC Nominal 4.75 – 10 V Gain 25 dB 28 dB 25 dB 40 dB