rectifier tube

rec·ti·fi·er tube

an electronic tube, used in x-ray transformers, to convert alternating to direct current.
References in periodicals archive ?
One of the world's leading defense contractors, Raytheon built a company on innovations like the gas rectifier tube for radios and the microwave oven.
The driver compliment consists of two 6922 input buffer preamp tubes, two 6SN7 pre driver/phase inverter tubes, two 5U4 rectifier tubes, and four 6550 output tubes.