Power Systems for the TH Radio System

The basic source of power for the TH radio equipment is reliable 230 volts ac obtained from a bank of special motor-alternator sets. These are normally driven by commercial ac power but switch automatically to battery drive on loss of commercial power. This firm ac power is distributed to the individual units of equipment where local rectifiers, of various types and sizes, produce dc power of the required voltage and stability. One of the more advanced of these is the 2900-volt regulated supply for two travelingwave tubes.