1. You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
    Dismiss Notice

Cobra 2000gtl going into transmit

Discussion in 'General CB Services Discussion' started by CRZNYT, Jun 13, 2018 at 6:36 PM.

  1. CRZNYT

    CRZNYT Member

    Joined:
    Sep 13, 2016
    Messages:
    22
    Likes Received:
    1
    Just picked up a 2000 and as soon as radio is turned on it goes into transmit.
    Any ideas??
    Cheers Donnie


     

  2. sonoma

    sonoma Sr. Member

    Joined:
    Sep 14, 2005
    Messages:
    1,673
    Likes Received:
    577
    does it do it with the mic unhooked?
     
  3. nomadradio

    nomadradio Analog Retentive

    Joined:
    Apr 3, 2005
    Messages:
    1,505
    Likes Received:
    928
    Unplugging the mike won't allow you to hear the receiver audio. You need a properly-functioning mike to hear the receiver in this radio.

    But it will make the red "Tx" light go dark, if the mike is causing your problem.

    73
     
  4. CRZNYT

    CRZNYT Member

    Joined:
    Sep 13, 2016
    Messages:
    22
    Likes Received:
    1
    Short answer yes with the mic unplugged it still goes right to transmit.
    When I first turned it on there was receive but after keying the mic a few times it will not come out of transmit.
    I did back listen to it on another radio in the shack and while there is not much going out the other radio did pick up the 2000.
    I knew it was like this before I got it so not to big an issue.
     
  5. nomadradio

    nomadradio Analog Retentive

    Joined:
    Apr 3, 2005
    Messages:
    1,505
    Likes Received:
    928
    Next question. What tools do you have?

    The schematics and service manual can be had at http://www.cbtricks.com/radios/cobra/2000gtl/index.htm


    A general-purpose multi meter and soldering iron are probably both necessary.

    One more question. If you select "PA" on the PA/CB switch does it stop transmitting? This could serve to narrow down where to look first.

    But this switch is popular to "hijack", or rewire to some other purpose. This test means something only if that switch is still wired factory stock.

    73
     
  6. CRZNYT

    CRZNYT Member

    Joined:
    Sep 13, 2016
    Messages:
    22
    Likes Received:
    1
    Yeah it stays in either CB or PA.
    Popped the covers off and there is a fair bit of dust and either dog or cat fur, going to blow it out after work today.
     
  7. jon666

    jon666 Well-Known Member

    Joined:
    Jan 24, 2006
    Messages:
    1,252
    Likes Received:
    415
    douche it out with water like Timmy does
     
    Robb likes this.
  8. Robb

    Robb Yup

    Joined:
    Dec 18, 2008
    Messages:
    10,637
    Likes Received:
    2,297
    LOL - don't say that!
    :LOL:

    Seriously, just blow it out with some compressed air - but don't get the air nozzle too close to the board or else parts may get pulled off. You don't have a clue yet as to what hacks are in there with poor solder work flapping in the breeze.
     
  9. CRZNYT

    CRZNYT Member

    Joined:
    Sep 13, 2016
    Messages:
    22
    Likes Received:
    1
    LOL.
    Yeah hadn't planned on the water torcher on the 2000 lol.
    I always stay fairly far away with the hose your right you have no idea who has been on there.
    Thanks guys
     
    kaos513 likes this.
  10. kaos513

    kaos513 Well-Known Member

    Joined:
    Apr 10, 2014
    Messages:
    1,226
    Likes Received:
    179
    anything that conducts electricity should not be washed with water.
     
  11. Robb

    Robb Yup

    Joined:
    Dec 18, 2008
    Messages:
    10,637
    Likes Received:
    2,297
    Alcohol will do nice job cleaning up either the top of the board or the trace side. I use an old toothbrush and alcohol to clean off old flux residue, and it works well enough. Using brake cleaner or acetone is a little bit rough on all of the plastic parts inside a radio; so take route with extreme care if you do that.
    I mean; if you must . . .
     
    #11 Robb, Jun 15, 2018 at 8:19 PM
    Last edited: Jun 15, 2018 at 8:35 PM
  12. sonoma

    sonoma Sr. Member

    Joined:
    Sep 14, 2005
    Messages:
    1,673
    Likes Received:
    577
    I like the 91% alcohol because it evaporates faster than the lower grade that is on the market.. a tooth brush and alcohol is about the best way to clean up a board. at least that is what I prefer to use.
    forgot to say to lightly blow the board off before the wash and then again after to get rid of all loose items.
    do not use to much air pressure or you will lift a trace or blow one in half with too much air. the canned air is not bad since it does not have a lot of pressure.
     
  13. Dmans

    Dmans Member

    Joined:
    Jan 22, 2017
    Messages:
    59
    Likes Received:
    21
    Water conducts electricity. :D Just saying'

    (Unless you are talking about distilled water)

    73's
    David
     

Share This Page

  • About Us

    The WorldwideDX Radio Forum was originally established in 2001. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. We are working every day to make sure our community is the best Radio Hobbyist's site.
  • Like us on Facebook

  • Premium VIP Member

    The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. Care to buy us a beer? We'd really appreciate it!

    Donate to us!