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  1. #1
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    DELL laptop charger causing my wireless signal to drop.

    Just figured out tonight why my wireless signal is piss now and again. i was downloading a torrent and my download speed was 617k, soon as i but the charger in it went down to 13k, i repeated this test about 6 times and it consistantly dropped from 617 to 13 in about 3 seconds.
    i reckon its time for a new charger.



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    Spectre's Avatar
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    Re: DELL laptop charger causing my wireless signal to drop.

    I'd check the BIOS (and Windows) settings to see if there is any power management enabled that could be set up wrong. I don't think it could be the charger as the laptop will have internal power supplies than regulate the 19V (usually, I think) from the wall socket power supply to whatever it uses.

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    Re: DELL laptop charger causing my wireless signal to drop.

    will do mate, never thought of that.

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    Re: DELL laptop charger causing my wireless signal to drop.

    Quote Originally Posted by Spectre View Post
    I don't think it could be the charger
    Why? Laptop chargers are switch-mode and naturally create RFI which can interfere with wifi. They usually have control circuits so that the degree of RFI is limited to meet regulations in the country of sale but, if those circuits fail, the output voltage/current will be unaffected. However, the interference could increase dramatically - this more common than you may think and can be failure in service or poor quality control.

    Would be worth trying to find a M8 who uses the same power supply and trying theirs.
    "It doesn't matter how beautiful your theory is, it doesn't matter how smart you are. If it doesn't agree with experiment, it's wrong." Richard Feynman

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    Re: DELL laptop charger causing my wireless signal to drop.

    the neighbour gave me the laptop in question because i done him a few favours. the power supply does look old and nasty. not the original one. the laptop had charging issues in the past. i changed the charging board (DELL Inspiron 1525 Charging Board 48.4W006 | eBay). the board looked a bit battered when i got it but it solved the charging issue. will look out for a charger.

    ps. i checked the power settings spectre, no probs there.

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    Re: DELL laptop charger causing my wireless signal to drop.

    Is the WiFi adapter and aerial alright? All plugged back in after you opened the laptop up? Just wondering if it is some sort of antenna effect caused when you have a long wire attached.

    Try the laptop with the charger plugged in but switched off and mains plug out.

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    Re: DELL laptop charger causing my wireless signal to drop.

    no change with the charger plugged in while disconnected to the mains. download speed remains constant.

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    Re: DELL laptop charger causing my wireless signal to drop.

    Could test H&H's RFI theory by unplugging the charger from the laptop and switching it on at the mains but I think they require a certain load to start up. Measure the voltage to make sure it doesn't sag under load if you have a 20Ohm resistor lying about with a high enough power dissipation rating.

    That would test radiated emissions and not conducted emissions.

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    Re: DELL laptop charger causing my wireless signal to drop.

    i'll see what ive got, i reckon the minimum value i'll have is a 1k.

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    Re: DELL laptop charger causing my wireless signal to drop.

    Okay, I know this is gonna sound way off the wall but...

    ...if you wrap the block and as much of the output lead in aluminium foil as possible the radiation (if it exists) will be reduced.

    If the download speed improves - you've nailed it - charger fooked


    "It doesn't matter how beautiful your theory is, it doesn't matter how smart you are. If it doesn't agree with experiment, it's wrong." Richard Feynman

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