Hash noise from wireless phone charger

Discussion in 'VHF/UHF - 50Mhz and Beyond' started by KX4AZ, Feb 11, 2021.

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  1. W1VT

    W1VT Ham Member QRZ Page

    N0TZU likes this.
  2. N0TZU

    N0TZU Platinum Subscriber Platinum Subscriber QRZ Page

    Outstanding teardown analysis! Apple is first rate quality.

    The cheap charger teardown is instructive for those who don’t think quality and safety marks matter.

    Quoting (emphasis mine):

    “...Note that this sub-millimeter gap is all that's protecting you and your phone from potentially-lethal 340 volts. I also took the transformer apart and found only single layers of insulating tape between the windings, rather than the double layers required by the UL. After looking inside this charger, my recommendation is to spend a bit more on a charger, and get one that has UL approval and a name-brand manufacturer.”

    While on the topic, don’t ever remove or defeat any grounding inside a power supply without knowing what the effect will be on safety.

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