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Electronic "Noise" Question

Discussion in 'Trucking Electronics, Gadgets and Software Forum' started by STexan, Sep 26, 2017.

  1. Sep 26, 2017 #1
    STexan

    STexan Road Train Member

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    Oct 3, 2011
    Longview, TX
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    When you plug in a particular device into a cig lighter port, and you see the RF meter on the CB radio go up significantly, is this "noise" being transferred through the power supply or via the antenna RF?

    I'm having trouble finding a quality cig lighter > USB adapter that's not "noisy". (If there is such a thing). Even on separate circuits I'm having the same issue.

    Would a noise limiter at the CB power source help?
     
    STexan, Sep 26, 2017
    STexan, Sep 26, 2017
    #1
    rabbiporkchop Thanks this.
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  3. Sep 26, 2017 #2
    lilillill

    lilillill Sarcasm... it's not just for breakfast

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    Possum Booger, Alabama
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    Disconnect your antenna... is the noise still there? If it is, the noise is coming through the power feed. You can try a snap on ferrite choke over the power feed for your radio.

    If the noise goes away, try shielding the plug by wrapping it with aluminum foil. It's the noisy switching power supply that's generating RF.
     
    lilillill, Sep 26, 2017
    lilillill, Sep 26, 2017
    #2
    rabbiporkchop, FullMetalJacket and STexan Thank this.
  4. Oct 17, 2017 #3
    rabbiporkchop

    rabbiporkchop Road Train Member

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    I have this one hard wired into my Tahoe with zero noise.
    It might be worth trying.
    Screenshot_2017-10-17_17-38-38.png
    [​IMG]
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    [​IMG]
     
    rabbiporkchop, Oct 17, 2017
    rabbiporkchop, Oct 17, 2017
    #3
  5. Jan 12, 2018 #4
    craig_sez

    craig_sez Road Train Member

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    novascotia,Canada
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    Hhhmmmmm...My gps and cell chargers make a good nit of white noise..Ill have to look into it...
    Im sure its the same idea as the big inverters maken noise..Its called dirty power...Wonder if an rv shop would have the ciggy lighter type..
     
    craig_sez, Jan 12, 2018
    craig_sez, Jan 12, 2018
    #4
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