Quote:
Originally Posted by Sephiroth
Does that frequency apply to the poxy Superhub PSUs?
And to interpret your explanation, change of dimension means vibration, the frequency of which defines the noise pitch. The vibration can transmit to other components that in a confined space such as a poxy Superhub PSU, need to be glued into a more stable alignment.
Am I wrong?
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Just comes from a dimensional change in the transformer core when it is magnetised. If this happens to be below ~18KHz then you'll hear it. If I get close to my SH1 plug-top PSU I can hear it singing but as it runs cool then there's no issue. Most of them are singing their heads off, it's just ultrasonic so you can't hear it. Mind you your dog or cat might. Encapsulating the transformer will cut the noise but it costs.
But I've only designed these sort of switching supplies for 30+ years so what do I know?
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