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Search results

  1. C

    Cobra 2000 GTL wire location question?

    Anyone have a nice pic of the bottom circuit board of a stock 2000 gtl?
  2. C

    Cobra 2000 GTL no 7.800 MHz at TP3

    I am seeing an issue so I was probing around and checking some Test Points and I’m seeing 2MHz on TP3 on USB and CT2 does nothing to affect TP3. This radio wasn’t working from the beginning and I found a few issues, it had the clarifier mod that I removed it was just sloppy and I don’t need. So...
  3. C

    Cobra 2000 GTL wire location question?

    Thanks guys, also found this brown wire cut coming of the switches any ideas?
  4. C

    Cobra 2000 GTL wire location question?

    I’m looking at a Blue wire connected to the main board and it’s running to MB3756 Voltage Regulator? Is this normal? where does it normally run?
  5. C

    The R114 Mod.

    I know this is an old post but does this mod really do anything? I just purchased a 2000 gtl that has it installed and listening on a receiver it sounds identical with mod in or out of use?
  6. C

    cobra 2000 gtl 4 sale

    I put the radio on the bench this morning and good news is it all works, some dirty switches but that’s normal. My test setup consisted of the following, LP-700, Oscilloscope, Spectrum Analyzer all going to a dummy load. With switch on back in up or down position I’m seeing identical power out...
  7. C

    Cobra 2000 GTL Blue led segments?

    They still make but need to purchase in lots of 2000 I was told. Snake has them but wants $90 for just the segments.
  8. C

    Cobra 2000 GTL Blue led segments?

    Where can one acquire blue led segments for the clock / counter?
  9. C

    cobra 2000 gtl 4 sale

    I will take it I sent a PM
  10. C

    Radios For Sale

    I will take the Version 1 Stryker 955HPC 375.00 shipped what’s your PayPal?
  11. C

    Radios For Sale

    Radios till available?
  12. C

    Cobra 2000 GTL questions/ help needed

    Yes I am using a digital scope to acquire frequency and what you say now makes perfect sense the scope want one frequency. I will pull out a radio with a meter and give that a go.
  13. C

    Cobra 2000 GTL questions/ help needed

    No I’m only seeing 2.5KHz max on one side and 3.3MHz max on other
  14. C

    Cobra 2000 GTL questions/ help needed

    Correct if I take a handheld cb and put the rubber antenna inside the circuit board area I can hear myself on all channels AM, SSB & USB. receive is good on all channels, AM & SSB. All my voltages at IC5 mixer are correct and I see 34 MHz at pins 11 & 13 but I don’t see the 7.8 MHz at pins 7&8...
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    Sams PhotoFacts Collection

    Hello, do you have a copay for Cobra 2000 gtl? CB-251 Thanks
  16. C

    Cobra 2000 GTL questions/ help needed

    I had a little time today so I probed both sides of D53 and dint get anything. I attached a pic of the schematic I followed to FT3. I’m not sure why but I see the 7.8MHz at both TP62 & 63 but not TP61 or 64. The components marked in green are ones I checked to make sure not open or shorted all...
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    Cobra 2000 GTL questions/ help needed

    OK I picked up a scope and started looking at SO42P, I was seeing 35.8MHz on pins 11&13 0volts in both RX and TX and nothing on Pins 7&8 but did see .54vdc on both RX & TX. I did trace the voltage issue back to IC4 MB3756 luckily had a spare chassis from from long, long time ago so I pulled from...
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    Cobra 2000 GTL questions/ help needed

    I will Borrow a scope today and check the IC5 inputs
  19. C

    Cobra 2000 GTL questions/ help needed

    it does receive in AM, LSB & USB. MB3758 shows the following RX Pin 6 8.2vdc Pin 8 .5vdc TX Pin 6 .3vdc Pin 8 8.2vdc
  20. C

    Cobra 2000 GTL questions/ help needed

    Nomad, I used both a wattmeter with 1watt slug and another radio as suggested and see and hear nothing Anywhere I placed the coax end.
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