In an earlier Century we would have thought about Variacs, Magnetic=20 amplifiers and Vacuum tubes. 100 vdc and a third of an amp is not really much of a challenge... May be there is more to the story? On 1/19/2015 2:06 PM, Dwayne Reid wrote: > I'm working on a project where I need an power supply adjustable over > the range of < 15Vdc through 100Vdc at 300mA max. I've done tons of --=20 John Ferrell W8CCW Julian NC 27283 It is better to walk alone, than with a crowd going the wrong direction. --Diane Grant --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .