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Background   A few weeks ago I came across a series of YouTube videos by the IMSAI Guy on an op-amp made from discrete components.  Over a series of posts he describes the circuits that make up a basic op-amp and demonstrates them on a bread board.  I found this very interesting and proceeded to build one myself.  It was to going to be a one or two night affair that has stretched into several weeks.  The issue has been a combination of being away from home for large str ...