Question about Cobra 29 LTD CB Radio

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Used to receive and put out up to 7 or 8 miles now only half mile range and squelch made all kinds of noise now doesnt make any what has happened

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This could be atmospheric, meaning it may have nothing to do with your radio.

There are a few things that could be happening. there is a phenomenon called skip that occurs occasionally. It is when solar flairs charge the ionosphere with energy. When this happens it causes radio signals to bounce off it and travel hundreds and thousands of miles further then they normally should. When this occurs, you will have a lot of back ground noise.

Next, some days there is very little atmospheric interference. Some days you can turn on the radio and there is almost no noise.

This could be it. If not then it could be any of the following.

  • RF gain is down. turn this all the way up.
  • Antenna problem
  • Coax problem.
After checking all these, if the problem still occurs, then there may be an issue that you will need a tech for.

Posted on Oct 11, 2010

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perhaps the squelch is set too "open". Try to program a tone code into the radios. Many times the manufacturer expects you to use a tone and they set the squelch too high, or open. This causes the squelch sound because the radio is trying to pull in weaker signals. If you are using a tone code, the model of the radio is needed to tell you if the squelch can be adjusted.

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Squelch setting set too high perhaps, reduce the squelch until you can hear something, then turn it up slowly until it start to scan again.
Radio Control Bar
The row of buttons across the top of the Main screen lets you fine-tune HomePatrol-1 reception, access Help, and reenter system configuration.
Button
Definition
Squelch
Sets how strong a signal must be before HomePatrol-1 stops on it.
Range
Controls how many channels are selected based on your location and systems' locations. Small range settings result in fewer systems and departments selected. A selection bar lets you set the range in 2-mile increments. Each screen tap is 0.5 miles.
Atten (Attenuation)
Reduces signal interference if you are in an area where there are a lot of radio signals. If Attenuation is set to ON, the status indicator turns red.
GPS
Displays the status of a connected GPS unit.
Help
Displays Help text.
Tap and hold to redo initial setup configuration.

Hope this helps
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1 Answer

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Well if they are not hearing you over a mile but you hear them over 5 miles that is a good indicator that your antenna is working properly but your radio is not getting out there. First go ahead and check the TX knob. Turn it all the way to the right so you modulate as much as the radio will allow. Next turn the squelch knob all the way to the left until you hear static and then turn it to the right slowly until the static noise goes away. Some don't mind the continual static but I like to squelch it out. The TX being turned to the right will allow your radio to work at full capacity. If you still don't get reports much over a mile then you can try a power mike to help you out a bit. Your microphone could have seen it's better days and can for sure mess up your transmit. Make sure your SWR is low 1:1.5 is the goal not to exceed 2. If all that checks out then have it peeked /tuned and aligned by a tech. Good luck to you.

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hELLO THERE
hERE IS SOME MODIFICATIONS FOR THIS RADIO
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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;
2. disable or minimize settings of interference eliminators, Quiet Talk, noise filters, coded squelch or CTCSS;
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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