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Blown Finals?

Discussion in 'CB Radio Forum' started by thunderkiss65, Jul 1, 2012.

Page 1 of 2
  1. Jul 1, 2012 #1
    thunderkiss65

    thunderkiss65 Bobtail Member

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    Jul 1, 2012
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    I was hooking up my CB the other day and i keyed up my radio without having my antenna hooked up. I am kinda worried i might have blown my dual finals. I was wondering if there is a way to tell if they are blown or still good. My meter still moves when i TX and still reads 12+ on the power meter. Would my SWR meter still move if the finals were blowm? Would the meter on the radio still move if the finals were blown?

    Thanks for your help.
     
    thunderkiss65, Jul 1, 2012
    thunderkiss65, Jul 1, 2012
    #1
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  3. Jul 1, 2012 #2
    rollingradios

    rollingradios Light Load Member

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    Mar 9, 2012
    Richmond, Va
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    Typically if the final(s) blow the needle will go backwards when you key.
     
    rollingradios, Jul 1, 2012
    rollingradios, Jul 1, 2012
    #2
    cuzzin it Thanks this.
  4. Jul 1, 2012 #3
    thunderkiss65

    thunderkiss65 Bobtail Member

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    Jul 1, 2012
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    So if my meter is swinging forward i should be all good? It swings all the way to the read and stays strong up there. I just hooked it up to a power meter and it shows my dead key on high at 10 watts and low at 2 watts so ya think i am good?
     
    thunderkiss65, Jul 1, 2012
    thunderkiss65, Jul 1, 2012
    #3
  5. Jul 1, 2012 #4
    rollingradios

    rollingradios Light Load Member

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    Mar 9, 2012
    Richmond, Va
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    You're fine
     
    rollingradios, Jul 1, 2012
    rollingradios, Jul 1, 2012
    #4
  7. Jul 1, 2012 #5
    thunderkiss65

    thunderkiss65 Bobtail Member

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    Jul 1, 2012
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    Thank you sir you have put my mind at rest.
     
    thunderkiss65, Jul 1, 2012
    thunderkiss65, Jul 1, 2012
    #5
  8. Jul 15, 2012 #6
    peterbuilt48

    peterbuilt48 Light Load Member

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    Jun 11, 2012
    providence,RI
    0
    that 's not necessarily so. Backswing could be cause by tuning to the wrong side of peak.
     
    peterbuilt48, Jul 15, 2012
    peterbuilt48, Jul 15, 2012
    #6
  9. Jul 15, 2012 #7
    Outlaw CB

    Outlaw CB Light Load Member

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    May 26, 2012
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    rollingradios was talking about the needle dropping in TX due to no or very little output power with defective finals. I should add, as opposed to where the meter needle was sitting in RX at the moment before it was keyed.
     
    Last edited: Jul 15, 2012
    Outlaw CB, Jul 15, 2012
    Outlaw CB, Jul 15, 2012
    #7
  10. Jul 15, 2012 #8
    AnyLoad

    AnyLoad Bobtail Member

    6
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    Jul 15, 2012
    Temple, TX
    0
    a simple rx signal detector is using 2 1n914 diodes , 1 led, one 10uf cap and short piece of wire.

    when you TX it will light up the LED with the RF power and when you talk it will get brighter. if interested its not hard to make. less than $5 in parts..
     
    AnyLoad, Jul 15, 2012
    AnyLoad, Jul 15, 2012
    #8
  11. Jul 15, 2014 #9
    Sterling210

    Sterling210 Bobtail Member

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    Jul 15, 2014
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    Your cb is most likely fine, u normally. Wont blow ur finala if its.keyed up for just a few secs, and NEVER trust the crapy meter on the radio, ALLWAYS allways allways use an external meter to.check swr, power, and modulation.
     
    Sterling210, Jul 15, 2014
    Sterling210, Jul 15, 2014
    #9
  12. Jul 15, 2014 #10
    drummer158

    drummer158 Bobtail Member

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    Jul 15, 2014
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    Rollingradios,what you re talking about is called backswing and has nothing to do with blown finals.
     
    Last edited: Jul 15, 2014
    drummer158, Jul 15, 2014
    drummer158, Jul 15, 2014
    #10
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