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wireless EV charging & AM radio reception

Nothing new. Anything with a switching power supply creates noise. When it comes to regulating consumer devices under Part 15, those horses left the barn, and the barn burned down twenty years ago.
 
Meh. Unfortunately I don't see how anyone can do anything to prevent or even complain too loudly about this, when the amount of interference-inducing electrical and electronics items that negatively impact AM reception have been on the rise for several years. If you try and eliminate or prevent one, you must do it for all. "Selective enforcement" isn't legal.
 
Mikey Radio said:
Meh. Unfortunately I don't see how anyone can do anything to prevent or even complain too loudly about this, when the amount of interference-inducing electrical and electronics items that negatively impact AM reception have been on the rise for several years. If you try and eliminate or prevent one, you must do it for all. "Selective enforcement" isn't legal.
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Its actually because of the choice the general public made buy purchasing inexpensive electronics made overseas. Once that trend started thirty years ago, protecting radio spectrum from spurious consumer electronic noise went out the window (literally).
 
@Kelly A I agree.

While all electronics emit some RFI and EFI interference, well made devices from respected manufacturers are usually designed with shielding and such to at least try to minimize interference, but most Chinese manufacturers don't seem to care, and will gladly build stuff to the lowest possible standards, to the point that they barely work right out of the box, and some devices, particularly bottom-of-the-barrel power supplies, can be so shoddily built that they pose a dangerously significant fire hazard.

The same, I imagine, applies to EV charging systems to an extent, but once the voltages and currents get that high, there's not much that can be done, short of building the thing into a lead-lined steel box (which is far too expensive to be practical, even for most high end manufacturers). That's not to say nothing can be done, and I think again, better made ones at least try to, while the Chinese-made junk spews and spews.

For example, I have some of those shiatsu massage pillows that drug stores like Rite Aid sell, and when one of those comes on, its shielding is so poor that it basically behaves like an RF jammer, rendering anything above about 6 MHz completely inaudible (it even affects our digital cable feed, which I believe operates in the UHF band somewhere between 400 MHz-1 GHz, maybe more, maybe less). It doesn't seem to affect the MW band, but I'm sure it easily could if the conditions were right.

So, I guess the moral here is that we should enjoy AM, such as it is, while we can, because it'll only get worse.

c
 
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