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Thread: RFI

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  1. #1

    Default RFI

    I can't believe it! My new Tentec 4020 QRP rig is interfering( 20 mtrs) with my wife's MAC.
    My MAC is 5ft from the rig es no problems. Her's is on a wireless modem. I suspect the modem is the prob. I put 2 chokes on qsb cables on her MAC but no help. Anyone have a suggestion?

  2. #2

    Default

    When you say "Wireless Modem", I assume you mean WiFi - that's up around 2.4Ghz - not very close to 20mtrs.

    If you were to describe what is happening to her mac - weird characters appearing, system locks, no network connection, etc - we'd have a better chance of offering some clues.

  3. #3

    Default

    The modem is a Quest DSL. my computer is direct and the modem broadcasts upstairs to my wife's computer. The interference causes the screen to pull sideways. Sorry I don't know mush about the equipment- there is what is called Ethernet port on the modem and my computer. No Wi-Fi

  4. #4
    Join Date
    Jan 2011
    Location
    Houston Texas
    Posts
    4,920

    Default

    Quote Originally Posted by NM0L View Post
    The modem is a Quest DSL. my computer is direct and the modem broadcasts upstairs to my wife's computer. The interference causes the screen to pull sideways. Sorry I don't know mush about the equipment- there is what is called Ethernet port on the modem and my computer. No Wi-Fi

    The RF maybe getting in the twisted pair DSL or Ethernet cables.

    It normally would not just affect the screen.

    Is the antenna above her computer ?
    "Theory only works perfect in a vacuum." KA9JLM Don

  5. #5

    Default

    The computer is on the upper floor of the house about level and 30 ft. from my Gap vert. I may have solved the problem- I took a few more turns around the chokes. We are in the midst of thunderstorms now so have ant disconnected. Thanks for everyones help!

  6. #6
    Join Date
    Jul 2005
    Location
    Lakeside, CA
    Posts
    631

    Default

    Quote Originally Posted by NM0L View Post
    The modem is a Quest DSL. my computer is direct and the modem broadcasts upstairs to my wife's computer. The interference causes the screen to pull sideways. Sorry I don't know mush about the equipment- there is what is called Ethernet port on the modem and my computer. No Wi-Fi
    Okay, if the screen is pulling sideways, it's got nothing to do with your modem - unless your modem is acting like an antenna and pulling RF into the computer.

    It sounds to me like you need to choke ALL your cables: video, audio, power, etc... and see if that helps. If not, then the problem could just be that 20 meters is a "magic" band. I get a lot of weird effects in my house on 20 meters - stuff that doesn't happen on any other band.

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