Home › Forums › temp › VHF FM hash from a switching power supply.. Arrrrgggggh. › Switchers
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Switching power supplies can be designed so they don’t radiate or induce noise. Modern TVs use switchers and there isn’t any fuss over them.
It is troubling that cheap, made in China, switchers get away without compliance. As long as there are no complaints to the FCC, the FCC probably isn’t even aware of the existence of many of these products. I think 99.9999% of the users are not even aware of the applicable FCC rules, so no complaints are filed.
I personally wish the FCC would address noise problems from switchers (and lamp dimmers and IBOC and …) instead of picking on little part 15 transmitters. The latest targets of a slew of FCC actions are directed to retailers who fail to inform customers that their TVs are not digital ready! Actually, this may be a good thing because it keeps the FCC busy elsewhere rather than picking on part 15. But. on the other hand, they certainly won’t be picking on devices that radiate interference!
You should file a complaint to the FCC on that noisy switcher. That won’t help your noise problem, but it might make you feel better 🙂