Question about Cobra 29 LTD CB Radio

2 Answers

Cb radio does not transmite

I have the Cobra29LTD i can recieve perfect and as far as i know everything is hooked up right and working but when i try to transmite out no one can hear me at all i even had one of my friends check with me and he could just barely hear me with full volume what wrong with my cb do i need a new mic

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  • cbi423 Jan 26, 2009

    No i didnt open it up and its just the stock mic

  • cbi423 Feb 01, 2009

    i got the radio working all i needed was a new mic but now its making a whine noise when i move the mic to talk and my SWR needle jumps around and im getting very high readings

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When you check your SWR you need to be in an open area. like a field or empty parking lot.

Put the switch to CAL and then turn up the cal dial until the need is all the way to the right on the cal mark while holding the key.

now while holding the key flip the switch to SWR. this will give you an accurate reading.

You should not be talking while doing this, and to help not picking up background noise, turn the dynamic mic gain down all the way.

when the switch is all the way up on s/rf it will move around because it is reading how much signal you are putting out and recieving.

Your SWR should read under 2. 1.5 is acceptable. any thing lower then 1.5 is good. the closer you get to 1 the better. If the antenna light comes on stop transmitting or you will blow your final.

Here is how to adjust the antenna if your swr's are off. check reading on channel 20, this channel should always have the lowest SWR.

If its high, then trun to channel 1 and take a reading, write it down.
then turn to channel 40 and take a reading. write this down.

If the reading on 40 is hight then on 1, then your antenna is adjusted too long. if it is hight on 1 then on 40 then it is too short.

either lower or hight your antenna, usually it will slide in and out of the base a bit if it is a metal whip. If its fiberglass it may have an adjustment on the tip. If there is no adjustment, and it is too long then you need to clip the antenna to tune it. with a wire cutter, clip an 1/8th of an inch at a time.

check difference each time you adjust the antenna between 1 and 40 and make adjustmnets bassed on the reading. If you are clipping the antenna, make sure not to clip it too short, because you cannot make it longer once you clip it too short.

Posted on Feb 08, 2009

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You might be having a dead key problem. Do you run a power mic? if so check the battery in it if you dont run a power mic then your have RF gain problems. Take it to a local cb/truck stop and get them to look at it.

You didnt open it up and mess with it did you?

Posted on Jan 26, 2009

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