Modifications

This page shows mods for the Cobra 150 GTL

Channel Modification

This is such a simple mod to do, all you need to do is remove R138, which is a surface mount resistor which is located next to the CPU.

Coverage after modification

Band 
Freq.
Display
Freq.
Display
Band
Freq.
Display
Freq.
Display
Band
Freq.
Display
Freq.
Display
Band
Freq.
Display
Freq.
Display
A 26.065 MHz 1 26.515 MHz .1 B 26.965 MHz 1 27.415 MHz .1 C 27.865 MHz 1 28.315 MHz .1 D 28.765 MHz 1
29.301 MHz
 .1
  26.075 2 26.525 .2   26.975 2 27.425 .2   27.875 2 28.325 .2   28.775 2
29.315
 .2
  26.085 3 26.535 .3   26.985 3 27.435 .3   27.885 3 28.235 .3   28.785 3
29.325
 .3
  26.095 3. 26.545 .3.   26.995 3. 27.445 .3.   27.895 3 28.345 .3.   28.795 3
29.335
 .3.
  26.105 4 26.555 .4   27.005 4 27.455 .4   27.905 4 28.355 .4 check 28.805 4
29.345
 .4
  26.115 5 26.565 .5   27.015 5 27.465 .5   27.915 5 28.365 .5   28.815 5
29.355
 .5
  26.125 6 26.575 .6   27.025 6 27.475 .6   27.925 6 28.375 .6   28.825 6
29.365
 .6
  26.135 7 26.585 .7   27.035 7 27.485 .7   27.935 7 28.385 .7   28.835 7
29.375
 .7
  26.145 7. 26.595 .7.   27.045 7. 27.495 .7.   27.945 7. 28.395 .7.   28.845 7.
29.385
 .7.
  26.155 8 26.605 .8   27.055 8 27.505 .8   27.955 8 28.405 .8   28.855 8
29.395
 .8
  26.165 9 26.615 .9   27.065 9 27.515 .9   27.965 9 28.415 .9   28.865 9
29.405
 .9
  26.175 10 26.625 .10   27.075 10 27.525 .10   27.975 10 28.425 .10   28.875 10
29.415
 .10
  26.185 11 26.635 .11   27.085 11 27.535 .11   27.985 11 28.435 .11   28.885 11
29.425
 .11
  26.195 11. 26.645 .11.   27.095 11. 27.545 .11.   27.995 11. 28.445 .11.   28.895 11.
29.435
 .11.
  26.205 12 26.655 .12   27.105 12 27.555 .12   28.005 12 28.455 .12   28.905 12
29.445
 .12
  26.215 13 26.665 .13   27.115 13 27.565 .13   28.015 13 28.465 .13   29.005 13
29.455
 .13
  26.225 14 26.675 .14   27.125 14 27.575 .14   28.025 14 28.475 .14   29.015 14
29.465
 .14
  26.235 15 26.685 .15   27.135 15 27.585 .15   28.035 15 28.485 .15   29.025 15
29.475
 .15
  26.245 15. 26.695 .15.   27.145 15. 27.595 .15.   28.045 15. 28.495 .15.   29.035 15.
29.485
 .15.
  26.255 16 26.705 .16   27.155 16 27.605 .16   28.055 16 28.505 .16   29.045 16
29.495
 .16
  26.265 17 26.715 .17   27.165 17 27.615 .17   28.065 17 28.515 .17   29.055 17
29.505
 .17
  26.275 18 26.725 .18   27.175 18 27.625 .18   28.075 18 28.525 .18   29.065 18
29.515
 .18
  26.285 19 26.735 .19   27.185 19 27.635 .19   28.085 19 28.535 .19   29.075 19
29.525
 .19
  26.295 19. 26.745 .19.   27.195 19. 27.645 .19.   28.095 19. 28.545 .19.   29.085 19.
29.535
 .19.
  26.305 20 26.755 .20   27.205 20 27.655 .20   28.105 20 28.555 .20   29.095 20
29.545
 .20
  26.315 21 26.765 .21   27.215 21 27.665 .21   28.115 21 28.565 .21   29.105 21
29.555
 .21
  26.325 22 26.775 .22   27.225 22 27.675 .22   28.125 22 29.575 .22   29.115 22
29.565
 .22
  26.355 23 26.805 .23   27.255 23 27.705 .23   28.155 23 28.605 .23   29.145 23
29.595
 .23
  26.335 24 26.785 .24   27.235 24 27.685 .24   28.135 24 28.585 .24   29.125 24
29.575
 .24
  26.345 25 26.795 .25   27.245 25 27.695 .25   28.145 25 28.595 .25   29.135 25
29.585
 .25
  26.365 26 26.815 .26   27.265 26 27.715 .26   28.165 26 28.615 .26   29.155 26
29.605
 .26
  26.375 27 26.825 .27   27.275 27 27.725 .27   28.175 27 28.625 .27   29.165 27
29.615
 .27
  26.385 28 26.835 .28   27.285 28 27.735 .28   28.185 28 28.635 .28   29.175 28
29.625
 .28
  26.395 29 26.845 .29   27.295 29 27.745 .29   28.195 29 28.645 .29   29.185 29
29.635
 .29
  26.405 30 26.855 .30   27.305 30 27.755 .30   28.205 30 28.655 .30   29.195 30
29.645
 .30
  26.415 31 26.865 .31   27.315 31 27.765 .31   28.215 31 28.665 .31   29.205 31
29.655
 .31
  26.425 32 26.875 .32   27.325 32 27.775 .32   28.225 32 28.675 .32   29.215 32
29.665
 .32
  26.435 33 26.885 .33   27.335 33 27.785 .33   28.235 33 28.685 .33   29.225 33
29.675
 .33
  26.445 34 26.895 .34   27.345 34 27.795 .34   28.245 34 28.695 .34   29.235 34
29.685
 .34
  26.455 35 26.905 .35   27.355 35 27.805 .35   28.255 35 28.705 .35   29.245 35
29.695
 .35
  26.465 36 26.915 .36   27.365 36 27.815 .36   28.265 36 28.715 .36   29.255 36    
  26.475 37 26.925 .37   27.375 37 27.825 .37   28.275 37 28.725 .37   29.265 37    
  26.485 38 26.935 .38   27.385 38 27.835 .38   28.285 38 28.735 .38   29.275 38    
  26.495 39 26.945 .39   27.395 39 27.845 .39   28.295 39 28.745 .39   29.285 39    
  26.505 40 26.955 .40   27.405 40 27.855 .40   28.305 40 28.755 .40   29.295 40    

Technical service bulletin to repair RX overload and TX audio issue


Download here (1.3MB, pdf format)

 

 

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