Home › Forums › temp › VHF FM hash from a switching power supply.. Arrrrgggggh. › CUI 6W switchers from Digikey are noisy
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I had a similar experience with 6W $5 switching PSUs from CUI available from Digikey. Was going to use them on my new TX design, but had to can the idea due to intermodulation effects. These PSUs were rated 12V 500mA. When I tried one of their larger 12C 1.25A (more expensive switchers) all was OK. It’s these cheapy ones that are lacking. I opened up the 6W supplies and noticed that the component count was an absolute minimum. I’m not surprised they cause problems. Oh well back to good old linears.