The Model 712B Power Supply is a very stable source of continuously variable direct current for plate and bias circuits. It also provides up to 10 amperes, 6.3 volts alternating current for filament circuits. A two-range voltmeter and a milliammeter (high voltage only) are provided to measure the direct current output. This power supply is very useful as a power source for small transmitters, oscillators, complex systems, certain types of klystrons, and general laboratory use.