It has receive audio but no transmit audio on am or ssb, what is the problem
First take a jumper wire and connect it to the DC Ground of the input of the radio then touch it to the TX pin on the radio if it does keyes up then its in the mic or mic cord on the end of the mic plug or where it goes into the mic cable goes up inside the mic. If the radio don't key up at all then check the main voltage regulator chip one pin will have 8 volts transmit and another pin will have 8volts recieve. If you get no switching DC voltage on the regulator then its bad and needs replacing there is also a known bad capacitor in the radio thats only 10 volts change it to 25 volts at the same capacitance.
First off check to see if your mic gain is turned all the way down. Second; if you have a power mic is the battery dead ir the volume of the mic turned down. If these check ok, look for a loose or broken audio wire in your microphone, and the connector (both ends can break). I have seen the wires break as far back as 4 inches from the mic head and the connector depending on how the user held the microphone, or pulled against the wire. if the problem is not found to be any of the above I suggest you take the radio to a qualified technician for repair.
SOURCE: Cobra 148 GTL ST. No AM transmit audio. Carrier is
Could be TR41 or TR42. I would try TR41 first.
629 views
Usually answered in minutes!
how do i get 120 channels on this radio
no tx on ssb or am the light truns red when you key the mike but no audio out or power. the mike is fine and mike gain is full blast finals are also ok checked board for cold soder joints also has got me stumped.
I have a cobra 1000Gtl cb base station was talking one night next turned on and no receive or transmit is the audio chip bad whats that chance or where else should i look
×