| Cobra 142 GTL |
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| Channel Modification |
| **Note** Before doing this mod, check to see if the radio has a MB8734 PLL. If so, change it to a MB8719 PLL. The MB8734 can not be modified. |
| 1) Locate and unsolder the 11.1125 mhz crystal and replace it with a 11.3258 mhz crystal. 2) Install 2 SPST switches on the back side of the radio. 3) Locate pin 10 of the MB8719 chip. Cut the trace that is connected to it. 4) Solder one switch to pins 11 and 12 of the MB8719 chip. 5) Solder one wire of the other switch to pin 10 and the other wire to the other side of the trace that you just cut. |
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| You can cut R104 for more modulation and adjust VR6 and VR7 for alittle more power. If it overmodulates on SSB, resolder R104 and use a powermike. |
| Cobra 140 GTL |