Ea elektro automatik 140w 280w fixed voltage linear power supplies 12 14v dc ea elektro automatik 39 200 108 this 70w fixed voltage linear psu 12 14v dc 5a from ea elektro automatik is a fixed voltage linear power supply equipped with an output voltage which can be adjusted via a potentiometer located conveniently on the psus front panel the operation is indicated by an ledwith no external heat sinks or hot air fan vents this high quality device is ideal for use in educational environment