Question about Cobra 200 GTL DX 4-Channels Base CB Radio
Power stops while transmitting on lsb high power,lights stay on and signals come in but no carrier after a few mins,then resets itself 5 seconds later
It sounds like the final transistor may be shorted/burned out. If you don't know how to locate or test the transistor you'll have to take it in to a tech. These transistors are usually quite cheap but as to the labour cost it depends on your tech. Usually what causes this damage is a bad antennae match or a bad antennae itself, even a shorted antennae cable. After you've repaired the radio check the antennae and cable first before connecting it up again, then check your match with an SWR meter. Good luck
Posted on Apr 19, 2014
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Posted on Jan 02, 2017
Depending on the type of power supply, radio frequency (RF) energy from the transmitter may be 'fooling" it into thinking that you're overloading it. Check to see if there's any discernible dimming of the meter lamp when this problem occurs, if so, the supply is the culprit.
Otherwise, its probable that the final amplifier transistors are overheating, either they are 'leaky' or not properly attached to the heat sink.
Posted on Sep 26, 2008
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