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Cobra 29ltd cb radio

My cb really transmit good.but it don't receive very well.i have a wilson 5000 antenna new coax cable.i have it hooked up to the battery

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The above suggestions are great I just wanted to add that if you can check the impedance or the ""match of the antenna to the radio. All CB antennas have roughly 50 Ohm impedance to match the output of the CB radio. The impedance is not critical as 25 Ohms to 100 Ohms is acceptable. Best signal transfer occurs at 50 Ohms, so every design is optimized very close to 50 Ohms. You can do this with an SWR meter. Anything from 1 to 2.5 is good, 1 being the best. You can get these meters for pretty cheap. I've seen them on ebay for $10 and you can get a new one for around $25. This isn't really going to help you with receiving but it can keep you from burning up the radio when you transmit and will help you get out better. While this isn't exactly waht you were asking about, I just wanted to let you know since you are setting up an antenna. You can adjust the match by loosening the screw on the coil and moving the antenna up or down. Check the SWR at both ch 1 and ch 40. Ideally you want the same at both ch's. If Channel 1 has a higher SWR, loosen the screw and lengthen the whip. If Channel 40 has a higher SWR, loosen the screw and shorten the whip. When the SWR at both is as close as you can get it, tighten the screw all the way.

Posted on Jun 15, 2008

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A couple of suggestions:
1. verify that the RF Gain is maximum clockwise;
2. verify that the ANL or noise limiter is OFF;
3. pls add a ground strap from the body of the Cobra 29LTD to the chassis/GND of the vehicle or to your house GND connection;
4. Verify that your Wilson 5000 has a sufficient ground plane such as roof or metal objects.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Posted on Jun 15, 2008


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Appreciate the direct "Ask Me". If I may clear up your concern:
  • you have two CB radios, one is a Cobra 29LTD and the other?
  • both have received and both do not transmit;
  • you have two trucks, one with a Firecracker 1000 antenna, and the other?
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Please check the above. You may need an SWR meter, a watt meter and a DVM/VOM to perform the tests.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information. Good luck and kind regards. Thank you for using FixYa.

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