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Cobra148gtl final&bias

Discussion in 'General CB Services Discussion' started by kaos513, Nov 13, 2017.

  1. kaos513

    kaos513
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    my klein meter goes up to 700mA


     

  2. kaos513

    kaos513
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    Meter set to 20ma tp8 i get 4.72ma
    Meter set to 200ma tp7 i get 191.5 ma
     
  3. Robb

    Robb
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    Yup

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    Driver should be set to 25mA and the final to 50mA.
     
  4. kaos513

    kaos513
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    blew the dust out of the old techtronics bench meter below is a picture of my reading for the final bias is that correct guys ?
     

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  5. kaos513

    kaos513
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    Here is my driver bias readings below is a pictire
     

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  6. kaos513

    kaos513
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    so the pictures above are correct readings ?
     
  7. Robb

    Robb
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    So long as that is the mA scale; then yes.

    Nice gear!
     
  8. kaos513

    kaos513
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    thanks forgot i had this gear in my closet dusted it off and started using it .
     
  9. kaos513

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    Im just looking to see if anyone can confirm these readings are correct.
     
  10. Robb

    Robb
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    #25 Robb, Nov 19, 2017
    Last edited: Nov 19, 2017
  11. loosecannon

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    Kaos, everything in your picture looks correct, but not knowing how the display works on that meter, i would set the range to the 200m setting and make sure that it still displays a "25" and doesn't show a "1" which would indicate an over range condition.

    you have it set to the 2 amp range in the pictures.

    If it were my meter, i would set both driver and final using the 200milliamp range.
    LC
     
  12. kaos513

    kaos513
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    ill will report my results soon thanks.
     
    #27 kaos513, Nov 20, 2017
    Last edited: Nov 20, 2017
  13. kaos513

    kaos513
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    something strange i encountered i believe this 148gtl has a wierd bias driver adjustment. my black lead is attached to purple wire and red is attched to ground of radio, that is how i adjusting the bias strange.all my othher radios i have done are in 2000m range and have had no issues strange .
     
  14. Robb

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    No; your red wire should be attached to one of the two posts.
    Didn't you watch my video?
     
  15. kaos513

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    i know that but this is the only radio i encountered this issue will not work on 2000m unless i ground red wire.
     

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