Question about Cobra 148 GTL 120-Channels Base CB Radio

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Cb radio I can call out and the other guys can hear me but i cannot receive anything at all, only if they are parked behind me. Any help would be appreciated. Tks, Dave

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I have a president hr2510 when you finish keying the mic.say am,usb,lsb the receive takes a 2 seconds to come back on any ideas out there....

Posted on Aug 17, 2007

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Midland Alan fm/am 40 chan.my cb is transmitting on intervals,

Posted on Jun 27, 2011

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Most common problem is the simplest sution.plug an external speaker into the radio. other poss. is audio output final is bad.do you have tx audio?

Posted on Aug 10, 2007

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Hi Dave, Based on your posting/description, a couple of possibilities. You have to check the settings of your RF Gain control, Automatic Noise Limiter and Switchable Noise Blanker also your Squelch control. Further, pls check your RX signal, if the incoming signal is strong say S5+ but no audio, then perhaps there is an internal problem with the RX/demodulator circuitry. If fiddling with the front control(s) does not solve the problem, then perhaps you need to seek the services of a qualified service technician. Sometimes, the USB, LSB switch can also casue similar problems. Good luck and hope this be of some help to you. Kind regards and 73s.

Posted on Aug 08, 2007

  • Louie  Role
    Louie Role Aug 10, 2007

    Hi all,
    I guess the "Guest" might be right, might just might be a simple case of bad internal speaker although the Cobra 148 GTL in my experience is not prone to such defects (now if it were a Midland or a President then....) Cheers all.

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I have a page for tuning your antenna. This can cause some distortion, but it shouldn't be that bad. Go here for how to tune your antenna.

also the internal speakers aren't that great. Try an external. I can't just use an internal because an external is so much better.

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Also. People who are close to you, may over load the front of the radio in the receive section, which will make it sound distorted.

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There are a few things that could be wrong. If there is something wrong with the mic, you may not hear anything on the radio. but weather will work.

Other then that, the receive section of the radio could be blown.

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take a 9 foot wire to the bad radio put the the wire into the center of the ant jack a see if you can hear your buddy glass mount ant are ****.
9 foot whip is best in car/truck 4 foot fiberglass cophased are next 4 foot are next mags are ok but over time and moving around they will mess up you paint

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If you look on the solder side of board you shoud see a straight line of 5-7 solder joints, look on the other side the audio vhjp is a bmack thin retangular ic chip. Not to worry you wont hurt anything by doing this. Its an old cb tech trick to test audio chips.GOOD LUCK.

Oh one other thing does the radio have same same problem in either vehicle? A insulating washer on the antenna bracket can cause this also,
Happy New Year , Tom

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