Question about Midland 75-822 40-Channels Handheld CB Radio

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75-822 cb that has extremely low audio output

HI, I've got a 75-822 cb that has extremely low audio output from the speaker in both wx and cb mode.

It is barely audible until the volume is turned to at least 3/4 volume, you have to turn it to max volume to understand anything. the radio seems to transmit and receive fine (people can hear me, and I can hear them, thought the audio output is very low)

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  • ShminkyBoy Mar 15, 2008

    Thanks for replying - I don't think it is the speaker, as the volume coming from the external is also very low. I don't know if the info helps, but, neither internal or external speaker distort at max volume, it's just not loud.



    Is there a way to increase the gain coming from the audio amplifier circuit on these?



    I've found some schematics here: http://service.alan-germany.de/CB/ALAN42...



    And I've also found a block diagram here: http://members.tripod.com/~Malzev/cb-fun...



    (I learned that the alan-42 radio is really an export 75-822 that's branded with the Alan name. the internals are identical otherwise)



    Since I'm unsure of how to proceed and what to modify to get what I want, I haven't actually changed anything yet.



    On a related note, What is the proper way to increase AM modulation on these? I've been told by other operators that my modulation is also low when I transmit.. I don't want to just go changing things around without knowing what "too much" is or how to measure it...



    Thanks again

  • ShminkyBoy Mar 25, 2008

    I guess I wasn't supposed to rate answers that didn't really help.. oh well, I ended up returning the unit for a refund. Thanks for trying anyways

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  • 46 Answers

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

Posted on Mar 15, 2008

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1st connect low to woofer, it only her low freq below 500Hz like drums and bass, if connect on med out the speaker is working as handpocket old radio audio. if connect on high the speaker is like no audio out. (the woofer take about 60-75% of amp power).

2nd connect the midrange at mid output you can listen to human voice cristal clear. if connect on high output you listem like esteric female shouting.

And connect the tweeter at the empty output

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Cobra 75 wx st


Hi and welcome to FixYa,

Initially, pls a couple of ideas you may want to consider/explore or try/check:
  • PA/CB switch must be to CB;
  • RF Gain max clockwise;
  • Squelch counter clockwise;
  • Volume to your desired level;
  • Mute (off);
  • external speaker/speaker connection;
  • audio amp, verify if there is TX modulation;
  • antenna, antenna cable. SWR should be low.
Good luck and Thank you for using FixYa. Happy New Year.

Pls be informed that due to my current rank and rating, even a Helpful would be detrimental to my status. Should this solution not address your concern, it would be appreciated if you could just not rate this at all. Cheers.

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