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backgournd noise

Discussion in 'CB Radio Forum' started by skywalking44, Mar 7, 2013.

  1. Mar 7, 2013 #1
    skywalking44

    skywalking44 Bobtail Member

    8
    0
    Mar 7, 2013
    0
    I have a galaxy mirage 88 in my peterbilt. It picks up my heater motor, gps, and sometimes my jake brake. the swr meter is 3/4 of the way up even with the squelch almost all the way up and the rf gain up all the way. When some one drives by me i almost instantly lose them. the background noise disapears when i unhook coax from the back of the cb. I was thinking the antenna was not grounded good by a test light from the positive cb post to my antenna mount and it light up. I have run a negative wire from battery to cb but nothing with the power. any suggestions?
     
    skywalking44, Mar 7, 2013
    skywalking44, Mar 7, 2013
    #1
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  3. Mar 7, 2013 #2
    cadillacdude1975

    cadillacdude1975 Road Train Member

    1,081
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    Mar 20, 2010
    Chattanooga, TN
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    any radio install should be with be done with the positive and ground wires direct to the battery. and dont trust a test light. check your grounding with an external SWR meter for the antenna and an OHM meter for the actual ground.
     
    cadillacdude1975, Mar 7, 2013
    cadillacdude1975, Mar 7, 2013
    #2
  4. Mar 9, 2013 #3
    Luwi67

    Luwi67 Heavy Load Member

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    Oct 24, 2012
    Long island
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    [​IMG]

    Use a multi meter set on continuity to check.
     
    Luwi67, Mar 9, 2013
    Luwi67, Mar 9, 2013
    #3
  5. Mar 13, 2013 #4
    jimbowilly

    jimbowilly Bobtail Member

    37
    6
    Aug 15, 2011
    Troy, NY
    0
    Most likely the ground wire is your problem.
    Try connecting your ground wire to different grounding points.
    Cut a 10ft to 20ft piece of 14 ga insulated wire. Use this wire as a temporary ground,
    for testing your grounding points. Some ground point will pick up more noise than others.

    Jimbowilly
     
    jimbowilly, Mar 13, 2013
    jimbowilly, Mar 13, 2013
    #4
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