SWR questions

Discussion in 'CB Radio Forum' started by Logan76, Sep 17, 2011.

  1. Sep 17, 2011 #1
    Logan76

    Logan76 Crusty In Training

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    I have a 1:4 swr when the trucks idling sitting in a parking lot, if I talk into the mic the needle pegs the 3:1, if i just sit there with a dead key its right around 1:4. is that normal?
     
    Logan76, Sep 17, 2011
    Logan76, Sep 17, 2011
    #1
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  3. Sep 17, 2011 #2
    AB7IF

    AB7IF Light Load Member

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    Somewhere, Ar
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    Yes because as power changes so does calibrate. Meaning you can only measure properly at the power you calibrated properly. When you modulate there is no longer a fixed power level or proper calibration, meaning the SWR reading becomes meaningless. At higher power levels line currents on the shield make a reading incorrect as well. I should add: always measure at the minimum power for proper calibration for highest accuracy.
     
    AB7IF, Sep 17, 2011
    AB7IF, Sep 17, 2011
    #2
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