Development of 505.8 MHz solid state RF amplifiers at RRCAT

Indus-2 RF power system was designed and built using four Klystron based RF stations, each delivering 60 kW at 505.8 MHz, making up total installed capacity of 240 kW of RF power. Due to uncertainty in getting Klystron tubes, it was decided to develop alternate high power RF source using solid state RF technology. In this scheme 60 kW CW RF power will be generated using scalable and modular combination of 8 kW amplifier units operating at 505.8 MHz. For this work necessary efforts were carried out for design studies, amplifier architecture selection, component selection and RF characterization. 15 kW RF amplifier has been fabricated by combining RF power from two 8 kW units. Two such 15 kW units have been developed and deployed at Indus-2