removing Y capacitors from power supplies, as a service
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I'm 80% serious, if there was a website with a collection of power supply X-rays and drilling templates, I'd probably have removed them from every laptop power supply I have
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what's the exact nature of impact of a missing Y capacitor anyway, is this another kind of pointless regulatory bullshit like "WiFi is incompatible with airplanes" or does it have at least some ground under it
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Replying to @whitequark
prevents high-frequency common-mode noise from flowing into mains
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Replying to @whitequark @11rcombs
You as an individual probably don't care but if literally everything didn't care about EMI on the mains then we'd probably have a problem.
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Replying to @whitequark @11rcombs
I don't have any specific evidence to hand, because I don't generally go around removing Y-caps from devices and measuring the result, but noise leaking back through the mains and interfering with other devices is totally a thing.
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Powerline comms are the obvious example but it's fairly easy to envision a scenario where a whole office building full of equipment that doesn't prevent EMI leakage interferes with nearby RF equipment, e.g. cellular and EMS dispatch.
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Replying to @gsuberland @11rcombs
at 200-1200 kHz (which are the typical SMPS frequency ranges)?
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I'm guessing for practical purposes it only matters with legacy AV equipment (VCRs, CRTs, etc.) around...
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