Ea elektro automatik ea ps 172w triple output variable dc power supplies ea elektro automatik 39 200 104 this 172w triple output variable dc power supply from ea elektro automatik has a compact and practical enclosure design which is closed on both the top and bottom with no external heat sinks making it ideal for use in educational facilities schools or workshops both the mains output can be switched via a circuit on the front panel in series or parallel while the adjustment of output pa