Wiring the Cobra Microphones Model: 21, 25, 29, 89gtl,1000gtlStandard wiring: 1-Shield2-Audio3-Transmit4-ReceiveModel: 18RV, 19X,19PLUS, 20PLUSStandart wiring:
A page with modifications for the cobra 148 gtl. A simple way to really increase the audio of a Cobra 148 GTL CB radio is to find R126 and jumper it. It is a 10K ohm resistor about 1" to the LEFT of the MIC jack. CB Radios for sale. CB Shop with new and used cb radios for sale.