The Kepco BHK Design Group consists of high voltage, precision regulated power supplies with automatic crossover between their voltage and current regulation modes. The BHK power supplies are equipped with high resolution, 10-turn voltage and current controls, mode indicator lamps, and output voltage and current meters., located on the front panel. A-C power line and d-c on/off switching, monitored by indicator lamps, a-c and d-c fusing, as well as safety output binding posts, complete the front panel equipment. 1-5 Rear barrier-strips provide the necessary terminals for programming in the voltage or current mode of operation as well as output and error-sensing terminals. 1-6 internal jumper connections are provided to convert the BHK Power Supply from standard to high speed operation. 1-7 The BHK Power Supply is of hybrid design, making use of vacuum tubes as the series control element .thus forming, with the solid-state reference and Amplifier an exceptionally reliable high voltage Power Supply 1-8 The Power Supply chassis and cover are constructed of etched aluminum. The front panel is heavy gauge aluminum finished in light gray (if not otherwise specified) and equipped with chrome-plated carrying handles. 1-9 The major part of the circuitry is located on printed circuit boards of the Plug-In type to simplify disassembly,