NO AUDIO / NO TX - Cobra 148 GTL 120-Channels Base CB Radio

OK bare with me now i have no idea of your knowledge level with CB/ SSB radios.
Lets make sure our setting on radio face is correct before we decide this is an mechanical problem.
Set the following

• Volume knob 12 o'clock
• Dynamike knob 12 o'clock
• Squelch full counter clockwise
• Rf gain full clockwise
• Select S/RF position on the SWR/CAL switch
• Select AM position on the USB/AM/LSB switch
• Select CB on the CB/PA switch

Now there will be some critics with opinions on the next instructions. Place a small screwdriver or test lead from a multimeter in center conductor of antenna jack listen for onair noise or radios operators to verify RX is working. Now remove the antenna/screwdrive/testlead. Then key mic just long enough to notice if the meter is swinging do not hold the mic button long this can damage the final. I tell you to do it this way rather that connected to your antenna system so we can eliminate the question if it is you antenna sytem or the radio.
If the LSB or USB was selected when you keyed the mic you would see no meter movement this is due to the lack of a deadkey or carrier for SSB which is a much more efficient method of transmitting on AM.
There are few things that affected the rx and tx together.