The power supplies described herein are designed for use in industry, laboratory, radio station and school to supply power to electronic and other equipment. The DC output voltage is electronically regulated and is practically independent of external load (within limits) and normal line voltage fluctuations, and is also substantially free from hum and noise. Quality components, careful construction and conservative ratings are employed to insure long and dependable service. To meet a variety of needs, the power supplies are available in the following styles having identical electrical specifications: Model 32 Compact heavy duty unit for mounting in standard 19" relay racks. Designed for use with associated equipment in permanent or semi-permanent installations. Removable end support brackets permit temporary use on the laboratory bench. Model 32-C Model 32 (above) mounted in a specially designed compact cabinet for bench use. Model 34 Heavy duty bench model. Two 4” panel meters for output voltage and current, front panel binding posts, rear access output terminals, panel controls, and a specially designed compact cabinet provide maximum convenience and utility as a general purpose power supply.