What Causes Cell Phones to Disrupt During Power Surges?

  • Thread starter Thread starter MacLaddy
  • Start date Start date
  • Tags Tags
    Cell Power
Click For Summary

Discussion Overview

The discussion revolves around the potential causes of cell phone disruptions during power surges, specifically in the context of a brief power outage experienced by a participant. The scope includes technical explanations and hypotheses regarding electromagnetic interference and the effects of power fluctuations on cell phone functionality.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant observed a cell phone disruption coinciding with a power outage, raising questions about the cause.
  • Another participant suggested that a high voltage spike could have been transmitted through the surroundings, potentially affecting the cell phone, especially if it was plugged into a charger.
  • It was proposed that an electromagnetic spike might have overloaded the automatic gain control (AGC) in the cell phone, although such devices are typically designed to recover quickly from transients.
  • Concerns were expressed about the possibility of a voltage spike affecting the participant's body, although it was clarified that the phone was not plugged in during the incident.
  • The participant noted that the cell phone had never required a restart before, indicating this was an unusual occurrence.
  • Another participant suggested that the power spike could have impacted the nearby cell phone tower, prompting questions about the distance to the nearest tower.

Areas of Agreement / Disagreement

Participants have raised multiple hypotheses regarding the cause of the cell phone disruption, but there is no consensus on which explanation is correct. The discussion remains unresolved with competing views on the potential mechanisms involved.

Contextual Notes

There are limitations in the discussion, including a lack of detailed information about the specific electrical conditions during the power outage and the characteristics of the cell phone in question. The dependence on assumptions about the proximity and condition of nearby infrastructure is also noted.

MacLaddy
Gold Member
Messages
290
Reaction score
11
Pacing in my office this afternoon, talking with my dear old mother on my cell phone; I happened to observe a brief power outage. A bump, or surge, if you will. It was a loud buzz (no transformer around me that I know of), lights went out, and strangely enough it knocked out my cell phone. I couldn't get a signal on it until I reset the phone...

Now what on Earth could have caused this? Everything came right back on afterwards, and all is back to normal, but I have never heard of cell phone interference from a power outage before.
 
Engineering news on Phys.org
It's hard to say without knowing more variables that could have accounted for the cell phone disruption under the circumstance.

One possibility is a transition of a high voltage spike being transmitted to the surroundings, and then through your body to the cell phone. If the phone was plugged into a charger then chance of that would be greater.

Another possibility is that an EM spike could have overloaded the AGC (automatic gain control) low noise amplifier in the cell phone. But such an AGC should recover quickly from any EM transients. So perhaps it's just poor shielding in the cell phone.

I used to have a cell phone that would occasionally freeze once in a while. Had to reboot it every time it froze.
 
what said:
One possibility is a transition of a high voltage spike being transmitted to the surroundings, and then through your body to the cell phone. If the phone was plugged into a charger then chance of that would be greater.

No, it wasn't plugged in when I was talking on it. And that's really a creepy thought, having a voltage spike surging through my body.

what said:
I used to have a cell phone that would occasionally freeze once in a while. Had to reboot it every time it froze.

First time I've ever had to restart this phone. Only had it for a few months though. Plus the fact that all the lights went out at the same time.

I haven't checked yet, but I believe there may be a transformer on a power pole just a few yards away from my office wall. (I'm on the second floor) I am thinking that could have blown... But not sure yet.

Edit: Nope, no transformer, but as I suspected there is a power pole maybe 5 yards away from the wall I share.
 
Last edited:
The power spike could have affected the nearby cell phone tower that you were connected to. How far away is the nearest tower? I can see the nearest tower from my office window...
 

Similar threads

  • · Replies 3 ·
Replies
3
Views
3K
Replies
5
Views
7K
  • · Replies 16 ·
Replies
16
Views
3K
  • · Replies 2 ·
Replies
2
Views
2K
Replies
4
Views
5K
  • · Replies 3 ·
Replies
3
Views
3K
Replies
12
Views
4K
  • · Replies 6 ·
Replies
6
Views
3K
  • · Replies 19 ·
Replies
19
Views
3K
Replies
10
Views
5K