On 2019-01-10, Andrew Gabriel  wrote:

> More recently, I tried some cheap DC DC buck converters from Amazon/Ebay.
> They work, but they generate so much RF noise the WiFi was unable to
> work on the Pi. None had any output filtering other than just the single
> electrolytic capacitor. Even with adding some filtering, I couldn't get
> WiFi working. Went back to a car cigarette lighter adaptor, which works
> fine. (A friend told me some of the car adaptors have bad RF radiation
> too - he used them in a glider to power a GPS, and you would get the odd
> bad one which killed the GPS signal.)

I have one in my car.  It wipes out the distant FM station I often listen to.

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