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I have a cobra 142 base, and the receive is all most clear out. where should I start looking for the problem?

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Check the RF gain knob. It should be all the way up. If the knob is bad, this could be the problem. You can un solder the wires from this knob, and hook them together to give you max gain, if your receive is back when you do that, the knob is bad.

You can replace the knob, (Call cobra for the part) or you can leave it soldered together, put some heat shrink on it so it doesn't short, and use it like that.

It doesn't really need RF gain.

Now on that radio, the RF gain is on a double knob with the SWR calibration. RF gain is only 2 wires, and the SWR CAL is 3. You would take the 2 wires next to each other and hook them together.

If there is still no receive, then the radio needs a tech. A part has failed in the receive section of the radio in the RFgain section. Probably a resistor lost its value.

Posted on Nov 20, 2009

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