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I wonder if someone suggested this at apple and was overruled because a bulky ferrite would "look bad"
> Eliminating Radio Interference from Apple Charger Why not notify the FCC ?
There is a big possibility the author just bought a counterfeit, AFAIK all consumer electronic devices have standard EMC compliance requirements, these spikes showed should be easily observed in the 10M chambers during testing.
The other day I used one of those ultrasonic eyeglasses cleaning machines while I had my AirPods Pro in and they went crazy with static as long as I had the machine on.
I wonder if someone suggested this at apple and was overruled because a bulky ferrite would "look bad"
Form over function.
The author has different priorities but they're idiosyncratic.
Earlier quoted context omitted.
Honestly, I’d rather my electronics cause some noise on a frequency I never use than have a ferrite bead on every USB cable under the sun. Seems like the author resolved the problem at minimal cost and effort.
You can be using a device and it might not harm you personally, but it could harm anyone around you using these frequencies. This includes airplanes and ground control, and boats. Your device's interference could cause problems or even life threatening dangerous situations. That's why it's illegal in many countries to cause too much radio interference (there's always some).
It may be that this charger passes the legal requirements while still causing small amounts of interference when placed near a receiver.
> This radio interference was also present on the aviation frequencies (around 124 MHz) How did this thing get FCC approval? What's it's FCC approval number? Who tested this thing? Want to look that up. If RF got outside the charger and into the USB cable, it's very badly designed. The power in the USB cable is DC. There shouldn't be any significant RF component. There should be ferrite beads and capacitors in the po…
Very bad. Strange also because Apple usually gets their PSUs made by Delta afaik and they are as good as it gets.
> This radio interference was also present on the aviation frequencies (around 124 MHz) How did this thing get FCC approval? What's it's FCC approval number? Who tested this thing? Want to look that up. If RF got outside the charger and into the USB cable, it's very badly designed. The power in the USB cable is DC. There shouldn't be any significant RF component. There should be ferrite beads and capacitors in the po…
(I have not read the entire report and I have no expertise in RF.)
Earlier quoted context omitted.
There is a big possibility the author just bought a counterfeit, AFAIK all consumer electronic devices have standard EMC compliance requirements, these spikes showed should be easily observed in the 10M chambers during testing.
The device was ordered from Apple's website.
I wonder if someone suggested this at apple and was overruled because a bulky ferrite would "look bad"
Honestly doesn't surprise me. I hold the same kind of sentiment after spending $1200~ on a brand new iphone 14 pro max just to find that I had to buy the charger brick so I could plug it into a wall. Come on Apple. Eliminating QOL things doesn't just automatically equal improvement.