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William Sommerwerck William Sommerwerck is offline
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Default Multiple switch mode power supplies

Would there be an EMC or cross-coupling problem due to 3
free-running oscillator SMPS running inside one box, often the
case that 3 would be togrther in close proximity charging 3
phones at the same time.

It's unlikely their transformers would have sufficient stray flux to produce

If you're worried, position two of them at right angles, and the third
not-in-line with either.

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