Eliminating radio interference from Apple charger
oh8hub.substack.com
Eliminating radio interference from Apple charger
1–10 of 179 posts
Re: Eliminating radio interference from Apple charger
#2I wonder if someone suggested this at apple and was overruled because a bulky ferrite would "look bad"
Re: Eliminating radio interference from Apple charger
#3I wonder if someone suggested this at apple and was overruled because a bulky ferrite would "look bad"
Form over function.
Re: Eliminating radio interference from Apple charger
#4From a marketing standpoint, Apple managed to turn "The Notch" into a feature. Whether they could do the same with "The Lump" is asking a lot IMHO.
Perhaps (as the author says), the engineers could come up with something more elegant.
Re: Eliminating radio interference from Apple charger
#5I wonder if someone suggested this at apple and was overruled because a bulky ferrite would "look bad"
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.
Re: Eliminating radio interference from Apple charger
#6The 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.
Re: Eliminating radio interference from Apple charger
#7> Eliminating Radio Interference from Apple Charger
Why not notify the FCC ?
Re: Eliminating radio interference from Apple charger
#8I wonder if someone suggested this at apple and was overruled because a bulky ferrite would "look bad"
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).
Re: Eliminating radio interference from Apple charger
#9> 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.
Re: Eliminating radio interference from Apple charger
#10> 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 power supply to deal with this. When the filtering is close to the switcher, it's much easier to deal with the noise, and very small ferrite beads, available in surface mount, can usually do the job. Once it gets out on an external wire, it's hard to filter.
This is an old problem for Apple. A report from 2013, from a pilot charging an Ipad in an aircraft.[1]
[1] https://pointsforpilots.blogspot.com/2013/06/radio-interfere...