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Echo link hum

Discussion in 'Echolink/IRLP Tech Board' started by N1YNY, Nov 28, 2019.

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  1. N1YNY

    N1YNY Ham Member QRZ Page

    Good morning and Happy Thanksgiving,

    1. I use a HP laptop.
    2. People I talk to hear a loud hum on my audio (transmission).
    3. If I unplug the power supply on the laptop, the hum is significantly reduced.
    4. Anything I can to do stop the hum?

    Appreciate any advice. Thanks.

    Pete
    N1YNY
     
  2. KA9JLM

    KA9JLM Ham Member QRZ Page

    That may be a hard one to fix, It could be a ground loop. Does your laptop have a 3 prong plug ?

    One thing you may want to try, Is to select the 300 Hz audio filter.


    upload_2019-11-29_8-34-58.png
     
  3. N1YNY

    N1YNY Ham Member QRZ Page

    Three prong plug...yrs.

    Will try 300 Hz Tx high pass filter.

    Tnx much.
     
  4. N1YNY

    N1YNY Ham Member QRZ Page

    Tried high pass filter..still hum...any other ideas.

    Thanks Don.

    Pete
     

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