Puts out modulated carrier & SSB but no audio
If you are using an external speaker, make sure your 1/8" audio jack is tip ring (it only has one black line or mono) and not tip ring sleeve (has two black lines / is stereo) if you must use a tip ring sleeve, insert it half way.
Check to make sure the ext speaker jack is not worn out. Even the internal speaker will not work if it is worn.
SOURCE: 142 GTL Good AM Carrier Weak Modulation????
Have you checked TR 26 AMC amp, and TR 24 & 25 AMC amps also for SSB TR34 ALC amp. make sure all voltages are right if all checks out try lifting out of the board or cut the collector of TR24 and try it. oop's that slipped out.
SOURCE: Cobra 148GTL Missing TX Modulation
The problem is most likely the audio ic . open the radio and see if the diode 44 is blown or see if you see anything that looks like it got hot around the plug area. if not contact me and i will buy it. is it an old or new 148 gtl.Read more
SOURCE: cobra 148 gtl b no recieve
make sure that the rf gain is turned up all the way.Check diodes D-12&D-13.
SOURCE: Cobra 148 GTL ST. No AM transmit audio. Carrier is
Could be TR41 or TR42. I would try TR41 first.
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