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Eliminating radio interference from Apple charger

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Re: Eliminating radio interference from Apple charger

#161

Post by fsh »

smith7018 wrote: post #156
ctheb wrote: post #108

Earlier quoted context omitted.

Are you saying that it’s a counterfeit? Apple sells this as a MagSafe charger: https://www.apple.com/shop/product/MHXH3AM/A/magsafe-charger

I own a MagSafe charger and unless the author added a third party black case (?) around the puck, then that’s not a real MagSafe charger. I haven’t heard of cases for it but that doesn’t mean they’re not common, of course.

From the article: "However, I have already bought this product and the other pieces for my car mount."

The black ring is probably one of the "other pieces for my car mount".

Re: Eliminating radio interference from Apple charger

#162

Post by stouset »

ggm wrote: post #136
stouset wrote: post #133

Earlier quoted context omitted.

It is electric, and it happens when you're on ungrounded AC.

The write ups I've read said it was a microvibration on the board, not leakage into you. Its origin is electric no matter what.

It’s leakage current. Again, it only happens when ungrounded.

Re: Eliminating radio interference from Apple charger

#163

Post by mystik21 »

gambiting wrote: post #154

My problem with literally every wireless charger I ever used is awful coil whine or ticking noise, really disturbing if you have the charger next to your bed. I've tried official Apple one, Samsung one, Anker, Auckley, few other random chinese brands, and they are all so loud when charging(Samsung's is probably the worst for it, as it has a fan inside - yes it charges my S23 pretty quickly but I wouldn't use it anywh…

Interesting...I've used my Apple MagSafe charger since its release with the iPhone 12 and I have never once noticed a whine or ticking from it. AFAIK, I do not have exceptional hearing loss from age and I am able to hear all but the highest of frequencies in the audible spectrum. Would you call it particularly high pitched?

Re: Eliminating radio interference from Apple charger

#164

Post by vitaflo »

gorkish wrote: post #45

I'm quite frankly amazed that this is the first time this guy has had to put a choke on something as a radio amateur. I guess he doesn't use HF that much otherwise he'd probably have opted to buy an entire bag of ferrites. Maybe his magsafe charger really is bad, but if it's plugged into a computer or a crap charger it's also likely that it's just RFI riding the cable straight out of the computer. USB stuff is the wo…

Can’t wait for his post after he ditches the HT in the car and buys a mobile unit to mount in it. He’ll be in a new world of hell.

Re: Eliminating radio interference from Apple charger

#165

Post by gambiting »

mystik21 wrote: post #163
gambiting wrote: post #154

My problem with literally every wireless charger I ever used is awful coil whine or ticking noise, really disturbing if you have the charger next to your bed. I've tried official Apple one, Samsung one, Anker, Auckley, few other random chinese brands, and they are all so loud when charging(Samsung's is probably the worst for it, as it has a fan inside - yes it charges my S23 pretty quickly but I wouldn't use it anywh…

Interesting...I've used my Apple MagSafe charger since its release with the iPhone 12 and I have never once noticed a whine or ticking from it. AFAIK, I do not have exceptional hearing loss from age and I am able to hear all but the highest of frequencies in the audible spectrum. Would you call it particularly high pitched?

Yeah.....like a very high pitched whine. At low battery level it's pretty much steady, then as it gets close to 100% the charger clearly provides power in pulses as it goes on and off with longer and longer gaps.

Re: Eliminating radio interference from Apple charger

#166

Post by [deleted] »

jve wrote: post #138
TheRealPomax wrote: post #127

Earlier quoted context omitted.

Gonna hit back with "nope". If Kleenex gets into toilet paper and tell you that toilet paper is now kleenex, the response is "you clearly don't what what the hell you're talking about, get your head out your ass". Magsafe is a magnetic power connector that clicks into a socket, whether Apple sticks their head up their ass or not.

> Magsafe is a magnetic power connector that clicks into a socket, Wikipedia on MagSafe (wireless charger) > MagSafe is a proprietary, *magnetically attached* wireless power transfer That probably means I can talk with my phone while wireless charger hangs on to the back of the phone?!

[deleted]

Re: Eliminating radio interference from Apple charger

#167

Post by elliottkember »

jve wrote: post #138
TheRealPomax wrote: post #127

Earlier quoted context omitted.

Gonna hit back with "nope". If Kleenex gets into toilet paper and tell you that toilet paper is now kleenex, the response is "you clearly don't what what the hell you're talking about, get your head out your ass". Magsafe is a magnetic power connector that clicks into a socket, whether Apple sticks their head up their ass or not.

> Magsafe is a magnetic power connector that clicks into a socket, Wikipedia on MagSafe (wireless charger) > MagSafe is a proprietary, *magnetically attached* wireless power transfer That probably means I can talk with my phone while wireless charger hangs on to the back of the phone?!

Yes, you can. I have double-sided tape under mine to keep it on my desk, otherwise you pick both up. I really like them stuck-down, I use one on my bedside table and one on my desk.

Re: Eliminating radio interference from Apple charger

#168

Post by wglb »

Animats wrote: post #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 po…

Switch mode power supplies such as this one emit RF. There are varying degrees of shielding that can help, but ham radio stations that are looking for good reception forbid using any such chargers (e.g., iPhone charger, Macbook chargers, etc).

Far better to use a linear power supply, which has a transformer and as a result is far heavier.

Re: Eliminating radio interference from Apple charger

#169

Post by ComputerGuru »

tuetuopay wrote: post #158
MilaM wrote: post #49

Earlier quoted context omitted.

I noticed exactly the same thing on a new Mac mini M2 base model when I conncted the power cord. Now I'm relieved that it seems to be a common problem. I don't know anything about electronics. Do you think this is some kind of defect or bad design of the power supply?

Apple is very generous on input capacitors for their power supplies. It's usually a sign a good design as it's one of the first places companies skimp; and ensures that even dirty wall power or highly spiky load will not trip the PSU and keep the computer fed. However, it is widely recognized that Apple overdid it on apple silicon macs. Like, they really should have skimped a bit on that one. (we have racks full of M…

What size are the capacitors?

Re: Eliminating radio interference from Apple charger

#170

Post by ComputerGuru »

gambiting wrote: post #154

My problem with literally every wireless charger I ever used is awful coil whine or ticking noise, really disturbing if you have the charger next to your bed. I've tried official Apple one, Samsung one, Anker, Auckley, few other random chinese brands, and they are all so loud when charging(Samsung's is probably the worst for it, as it has a fan inside - yes it charges my S23 pretty quickly but I wouldn't use it anywh…

I’m very sensitive to coil whine (and have documented hyperacusis for high-pitched noises) but I’ve had no issues with the Belkin wireless fast charger; BUT if you’ve had this issue with all the different makes and models perhaps it is the coil in the phone and not the one in the charger that is faulty? There’s a coil in each.
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