Question about Cobra 29 WX NW ST 40-Channels Base CB Radio

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Poor sending and recieving

Very limited range of about less than a quarter of a mile

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In my experience, most of the time when you can't rx or tx more than 1/4 mile, the antenna is grounding out, the coax center conductor is broken, or the coax center condutor is shorting out to the sheilding.

Rollin CBs
Mt. Vernon, TX

Posted on Jan 23, 2008

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Make real sure that you have a good SWR for your antenna system. ( No higher than 2;0 to 1 ). To do this it will require an swr meter. A meter can be purchased at any CB Shop that sell finer products. If the SWR's are good, then you probably have a bad final or driver transistor in the Radio.
Good Luck
NC Electronic
Mills, Wyoming

Posted on Jan 07, 2008


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Hi Mark,

I understand your concern with the actual range of the Motorola T5000. Being UHF radios, they are severely limited by any obstruction in between, be it trees, buildings, hills, foliage, terrain and any others that would block "line of sight". Additionally due to the inherent design restrictions imposed on these radios, the FRS channels are limited to pushing out 0.5 watts making the GMRS channels better choice since the radio will be transmitting at 1 watt. To my knowledge, channels 8 - 14 are FRS only.

Possible things you can try to improve transmit distance are:
1. use AA Alkaline batteries instead of the rechargeable ones;
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3. replace the stub antenna with a Larsen Quarter wave. You may need to install a BNC mount to accommodate the Larsen. Incidentally, this will also improve the receive range and not only the transmit.

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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