some of you folks use microscopes and may be in need of a power supply for the illuminator, so here's a link
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it's a nice tapped 6.3V transformer inside, so it probably has other uses, but it's best use is for its intended purpose. Of course, if you put a gooseneck in the hole on the top and power a 6V 20 watt bulb, you get a great little lamp for your work bench.