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Picked up a used oscilloscope from a guy in Durham
He said something about grounding that finally made it click for me, you know, like all those times I was chasing noise in a circuit and it was just bad probe grounding. I've been probing around on some old server power supplies and now I'm double checking my ground clips on every reading. Anyone else have one of those slow motion realizations about a tool you've used for years?
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fisher.adam29d ago
...and now I'm religious about checking my ground on the scope before I even think about hooking up a probe. But you know what really nailed it for me? The first time I accidentally touched a probe tip to a live rail with the ground clip still floating. The scope made this weird hum and the trace just went wild. I stared at it for a solid minute before I figured out what happened. Its like all those YouTube videos about proper grounding suddenly made sense in one bright moment of panic when I thought I fried a perfectly good Tektronix.
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murray.spencer29d ago
Using a cheap isolation transformer on that floating rail saved my scope and taught me the lesson for good.
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