cobra 146gtl,no tx audio

[pathfinder259]

i have a cobra 146 gtl it has no tx audio but the rx audio is fine.the dead carrier is also good.but it nether will modulate on am or ssb.i have checked the mic,on a mic tester.the mic is good.parts i have already changed include,audio chip,balance modulator,am regulator,mic amp transistors,c123,c122,d43,tr42,tr43,tr44,tr45,tr46,tr28,tr29.i have also checked for loose connections,nothing is helped yet.i am kinda at a standstill on this one.i would appreciate any suggestions,help,information,voltage test point info.ect... jimmy/pathfinder/259/mississippi thanks very much,,and have a good day

 

[DTB Radio]

Have you contacted Cobra or one of their warranty repair centers to see about getting a schematic? That's your next step, unless you already have the schematic. You'll need one to trace the audio path to its fault.