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I Built and Used My First Incandescent Bulb Current-Limiter
This was used for a guitar amp that was continually
blowing slow-blow fuses instantly upon turning the amp on. https://www.youtube.com/watch?v=k5oNQ1etN2c In my case, the bulb would briefly light up, and then fade out within about a second. I read this meant the amp was normal, and didn't have a short to ground, and when I plugged the amp into the wall normally, I was able to trouble-shoot it normally. But I would assume the bulb lighting up initially, is due to the initial in-rush current, that charges up the electrolytic filtering caps, on the outputs of the rectifiers? Because the initial 1 second flash only happened with a linear power supply guitar amp, and did not happen with my switched-mode guitar amp. With the latter, the bulb never glowed noticeably, even at turn-on. |
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