Cobra set up

Awesome. Check with these folks: Support Cobra Electronics Corporation

How do you have it installed? in a vehicle? or in a building. What power supply configuration are you using? Is it adequately earthed/grounded? What type of antennas do you have? waiting for your info :)

Open your radio and, with a small flathead plastic screwdriver, adjust T713. Any other questions feel free to ask.

We can order them Power cables. We have a few antennas instock or can order what you need. with the lowest prices around.

make sure they didn't clip your mod resistor in the radio if they did soilder it back and try again.

Look into the Workman Saturn B100 antenna. It's what I would use.

Hello John. A good earth ground for your antenna is more important than for the radio. Using the closest possible point to the antenna pole, preferably within a couple of feet, you need to ground the antenna pole to the earth. Go to a hardware store and buy a copper grounding rod which will be eight foot long and buy, as little as you can possibly get away with, some of 10 gauge wire and some kind of clamps that will attach the wire to the antenna pole and to the grounding rod. Google "antenna earth grounding" may help also.

Hello Jim. These radios do not work well with any power mic including the power echo mics because they have good modulation boards in them. But if you still want to try then check http://www.cbtricks.com/radios/cobra/200gtl_dx/index.htm

Could be the jumper on the back for hooking up external speakers fell out.

Could the battery be dead? Other than that, it may be a bad solder joint inside the mic.

Geno