Cobra 148GTL User Manual

Technical Bulletin 10020 Page 2 of 2
Checking Microphone Sensitivity
1. Connect an audio source to the microphone input.
2. Connect a modulation meter to the antenna connector.
3. Turn Soundtracker off.
4. Adjust the audio source for 50% modulation.
5. The audio level should be between 1mV to 2mV. If the audio level is below 1mV, increase R126.

Cobra 148GTL Specifications

General

Modes	AM/SSB
Channels	40
Power Output	4 Watts AM, 12 Watts SSB
Microphone Type	Dynamic
SWR Calibration	Yes
Antenna Impedance	50 Ohms
Power Supply	13.8 VDC
Weight	4.5 lbs
Frequency Range	26.965 MHz to 27.405 MHz
Dimensions	2.25 x 7.25 x 9.25 inches