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 ?
Among the company's achievements are the first application of microwave energy to cooking with the invention of the Radarange(tm) microwave oven; the world's first electronic depth sounder, the Fathometer(tm); a rectifier tube that converted early home radios from battery to plug-in operation; mass production breakthrough on magnetron power tubes, the heart of radar systems; and the first guided missiles to intercept and destroy aircraft and ballistic missiles.