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)

Anonymous 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
Anonymous 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

1 Answer

lars ahlsen

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Posted on Mar 15, 2008

lars ahlsen

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Joined: Mar 06, 2008

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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

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