I wired this up with a apple airport cable so it would fit my Pinecil soldering iron and not have a stupid heavy ferrite bead at the end near the plug. The noise changes depending on the load. With a 9w load it's less frequent and with a laptop 50w+ load it's higher pitched. If I press on the transformer with something plastic it also gets a little quieter. Any danger here? Am I actually hearing the switching of the FET? It's like tapping not really squealing like coil whine.
I realize it's probably a low end little brick but it came apart super easy without any cracking or melting of the case so I decided to use it. I probably have a dozen other 19v 3a bricks I could use instead if this is a hazard.
I realize it's probably a low end little brick but it came apart super easy without any cracking or melting of the case so I decided to use it. I probably have a dozen other 19v 3a bricks I could use instead if this is a hazard.
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