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Retrocomputing

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    It stops humming from the transformer. Commented Aug 7, 2017 at 16:34
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    It was handy when my C64 power supply failed and I kept it going by putting it in a bucket of icewater. When my mom found out, she made my dad buy me a replacement, saving me $50 in precious allowance money. Commented Aug 8, 2017 at 6:53
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    @Nelson Potting is one of the most effective ways to keep water out of electronics. As for how it fixed it, it likely had a fault causing overheating. Commented Aug 8, 2017 at 9:40
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    Over 30 years later I still have a scar on the second knuckle of the first finger of my right hand from trying to open a C64 power supply. That epoxy is sharp in places. Commented Aug 8, 2017 at 15:08
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    Being a young computer dork with a C-64 and living in the middle of nowhere - when my C-64 power supply fried my Dad fixed it for me. He carefully cut away the epoxy, reverse engineered the circuit, built a new one, and put the whole mess in an old chassis left over from some earlier (read: 1960's) project. I still have that power supply, and it still works perfectly. It's not impossible to salvage or repair a potted C64 power supply, it's just really hard. Commented May 24, 2019 at 16:24