Question about Cobra 25 LTD 40-Channels Base CB Radio

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Transmitting i can receive transmission but everybody barely hears me. The radio works in another truck fine, but in mine it has this problem. What can this be, coax or antenna ground possibly/ The antenna worked in this position all the time.

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Its the coax. i had this same issue. i thought a bought a great strand but, it was very poor in design and it developed many breaks over time, reducing its transmitting ability. I would also check the mic wire and head connections as well. this is a problem spot at times.

Posted on Feb 25, 2009

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I have an almost new Midland 75-822 that the WX works fine on, but the CB doesn't seem to receive, or transmit. It operates normally, but no reception, and no evidence of transmissions.


you'll need a schematic and some knowledge. there a two diodes that control the rx and two that control the dx.Check them to make sure they are producing the correct power out put if they are not you should replace all 4

May 10, 2012 | Midland 75-822 40-Channels Handheld CB...

1 Answer

Can't talk to anybody, but can hear them just fine.


Could be a few things.One as simple as a bad soilder on the board or your voltage regulator could have went out. If you take the top cover off and talk in the mic and its starts transmitting then you have a bad soilder to check the regulator is a little harder and not for just anyone to do.

May 06, 2010 | Cobra 25 WX-NW-ST 40-Channels Base CB...

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ICAN HEAR EVERYBODY BUT I CANT GET OUT I SWITCHED MIKS AND STILL CANT GET OUT people can hear me but when they talk to me all i hear is static


You said that you can hear everybody and then you said all you can hear is static. Which is it?

If you can hear everybody and you have switched to a known good mike, then you either have a bad antenna or you have a bad final amplifier caused by a bad antenna or by having transmitted at sometime without an antenna at all.

May 27, 2009 | Cobra 29 LTD CB Radio

1 Answer

I can't hear.


I am not completely sure i understand whats going on. it seems like it could be a few things because of different parts of the question.

With my CB everyone else can hear me and the signal transmits fine
Good!
I have tested to see that my CB is picking up the signal
how? A meter on your radio should either light up or a needle should swing if you are receiving.
their voices don't play through my mic of my PA
A Mic is a microphone, i think you mean speaker.
Ok this may be the cause of the problem....
Try a couple of these.
First, unplug the PA Speaker, this simple act should make you to be able to hear the incoming signal.
Make sure the CB is on AM or CB not PA
If you can not hear the speaker may be busted or an internal part may be blown. (needing the expertise of a required technician)
If you can here when you do this make sure the speaker is working by plugging it into a computer. (mp3 players will barely put out enough power to make a sound audible) if this works, make sure you plug it into EXT not PA on the back of the radio.

one more thing to check. i dont know what radio you have but try turning it untill you hear static. if its all the way the other way you may not hear anything, also turn up any RX or rec. knobs.

i have limited knowledge about whats going on, but i hope this will help fixya

Jan 05, 2009 | Midland 1001Z 40-Channels Base CB Radio

1 Answer

Low transmitting range on Cobra MRF55


Hi dstrand, sorry you are having a problem. I will need some more info if you can. Is this radio in a base situation or mobile? Have you had any work don recently? Have you changed anything on the system? (Microphone, antenna, coax, etc)

Haave you checked your swr recently/ If yes, did you use a seperate meter or did you use one built in the radio?

Hope to hear from you soon.

Tom

Dec 30, 2008 | Cobra MR- F55 Base CB Radio

1 Answer

Cobra 29 LTD Classic not transmitting or receiving


As I understand from a tech friend of mine, most truck beds are not grounded well enough. Perhaps you could borrow/purchase a magnet mount antenna and locate it on the roof, for testing. Then you would have it narrowed down to the location.

Dec 05, 2008 | Cobra 29 LTD CB Radio

1 Answer

75-822 cb that has extremely low audio output


Hello..if you can try to connect a external speaker or phones..if the volume is ok..than i think it is time to replace your internal speaker..pse tll me....good luck...Ron

Mar 14, 2008 | Midland 75-822 40-Channels Handheld CB...

1 Answer

Cant hear


Several things can cause poor reception. I have a few questions for you.

1. Have you tried measuring your SWR (standing wave ratio)? This helps give you an idea how well your transmission line and antenna are working.
2. Is this radio being used as a base or mobile? Do you have proper grounding on the antenna?
3. Pressing the mic button and seeing the radio indicate "transmit" does not always mean you are transmitting at full rated power. Have you tried transmitting through a wattmetter into a dummy load?
4. If the transmission line is good and the antenna is good, then I would suspect that something may be wrond with the receiver's front-end (sensitivity).

Receiver sensitivity can be checked by using a RF signal generator. Unfortunately you'll have to take the unit to a repair shop to have that checked. Try the other things I mentioned above. Let me know what you find and we'll go from there.

Good luck,

- Jim

Jan 28, 2008 | Midland 1001Z 40-Channels Base CB Radio

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