> On Oct 13, 2016, at 6:05 AM, Van Horn, David 
> <david.vanh...@backcountryaccess.com> wrote:
> To be fair here, phone chargers have almost no requirement to be quiet other 
> than conducted and radiated emissions limits.
> It’s charging a battery.

Not quite. They power the device in question *while* they’re charging the 
battery. Now, I’ll admit that powering a phone is a much lower bar than 
powering, say, an audio amplifier, but I’d also say that some of the devices on 
that page were pumping out way more garbage than even any digital system should 
have to put up with.

> As a designer of some fairly quiet SMPS systems, this feels like “look how 
> bad a family car this tractor is".

Well, there’s some of that, but the worst offenders were counterfeit devices 
that were pumping out unreasonable levels. To your analogy, they were the outer 
shell of a family car with a the engine from an Edsel installed in it without a 
muffler or any emissions controls fed from an open bucket of gasoline sitting 
on the passenger’s seat.

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