It’s easy to slap an LED onto a pedal. At least, it’s easy for me now. I’ve moved onto bigger and badder. Largely through trial and error, I’ve managed to make a few sick amps well again. I’m still a novice, but I’m learning and it’s fun. The online world is a treasure trove of knowledge and helpful people. Those helpful people told me I was doing some stupid things. I was able to rectify at least one of those things.
This is a light bulb limiter. You can’t buy one and they’re all built a little different. It’s extremely helpful when dealing with a broken amp. In a previous repair of a Peavey XXX guitar amplifier, I was blowing fuses left and right (maybe center, too). The light bulb limiter is a D.I.Y. device that coulda saved me a lotta pain.