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A Dim Bulb Tester Is For Testing Other Equipment, Not Bulbs - If you’re testing old stereo equipment, a dim bulb tester can really come in handy... - https://hackaday.com/2024/01/18/a-dim-bulb-tester-is-for-testing-other-equipment-not-bulbs/ #classichacks #filamentbulb #toolhacks #tester #bulb