Kepco Series JQE Power Supplies are general purpose, precision stabilized voltage sources in the "quarter-rack" configuration. The units are designed to be part of a larger system and not to be operated as a stand alone bench power supply. The units are designed to operate immeiately without any internal adjustments. External points on the outside case should not be readily available, provided the unit is in a rack as an integrated OEM subsystem. If it is desired to switch the AC input power range the units must be returned to the factory for authorized service personnel to make the appropriate terminal connections. There are absolutely no serviceable components within the power supply that are accessible for nonauthorized personnel to work on. JQE Power Supplies have linear, full-dissipation series pass transistors (NPN), driven by anin- tegrated circuit operational amplifier. A sharp current-limit circuit renders the power supply completely short-circuit proof. JQE 1/4 Rack Power Supplies may be readily converted to provide constant current by the addition of an external sensing resistor and a current control resistor. The output of the JQE 1/4 Rack Power Supply is remotely programmable. All necessary connections are available on terminals at the rear barrier-strip. 1-5 The compact design of the Kepco JQE 1/4 Rack Series includes a heatsink of exceptional efficiency, in combination with a reliable low-noise fan. JQE 1/4 Rack Power Supplies feature proven design with conservatively rated components for added reliability. 1-6 JQE Power Supplies are identical in their mechanical dimensions (Refer to FIG. 1-2) and in their electrical specifications, except as noted in TABLE 1-1. 1-7 The main chassis frame of the power supply is constructed from cold-rolled steel, as is the perforate wrap-around cover. The front panel is manufactured from aluminum (Refer to FIG. 1-2 for finish).