TWT Amplifier. 8 to 12.4GHz. 39.5dB Gain. 20 Watts Output The Varian line of Low Power RF Amplifiers has been designed fo rgeneral purpose laboratory test and measuring applications. Rated powers of 10 watts and 20 watts are offered over the frequency range of 100 MHz to 26.5 GHz. Primary power is 115 Vac, single phase, 50/60 Hz. 100 or 230 Vax mains power operation is optionally available. The high efficiency power supply designs provide the minimum power consumption possible. High filtering and regulation insure performance within all specifications over a wide range of environmental and operating conditions.