Question about Maxon MCB-30 40-Channels Base CB Radio

3 Answers

No sound My c.b. transmits but either does not receive,or cant hear,tried an external speaker and it still does not work

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  • Jack Owens Jun 06, 2008

    My Maxon will receive at times but does not transmitt at all. Does this sound like something you have encountered before?

    Thank you,

    Cracker Jack in Georgia

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You might have a loose wire in the mic plug, also in the plug itself there are 4 holes for 4 pins in the radio to fit into, these 4 holes have tiny metal sleeves in them to make contact with the radio pins. these sleeves are split and you can take a tiny jewlers screwdriver and slightly close up these sleeves this causes them to fit tighter on the radio pins creating a better connection. these sleeves WILL over time spread out causing the radio to lose a function such as receive or transmit I have encountered this problem several times in the past at my shop. Good luck on your problem.

Posted on Aug 01, 2007

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Can anyone tell me how this can be hooked up to external car speakers?

Posted on Jul 09, 2008

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The one I worked on had cold solder joints...the joints needs to be reheats very careful to make the proper bond.

Posted on Nov 22, 2006

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1 Answer

I have royce cb base station it transmits it receives..it has modulation//it does not have any sound..checked sqelch rf gain cb/pa switch???


The internal speaker is probably blown. Try an external speaker and see if you can hear received noise. If you can the internal speaker is likely shot. If not, try an external speaker in the PA socket. If this works, then you have a problem elsewhere and need to take the radio into the shop for repair.

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With an antenna connected, volume set to 1/4 from minimum, squelch / RF squelch fully counter-clockwise (or minimum) - do you hear anything from the speaker? If not - plug an earphone / external speaker into the external speaker jack on the rear - any sound? If not, do you see the S/RF meter needle moving (not resting on 0 or 1)? If not - find a channel with activity on as indicated by the S/RF meter first.

Try with another antenna connected if possible, or transmit with another CB radio on the same channel nearby - and try again.

If you aren't able to receive sound (not just static) - or indicated signals on the S/RF meter, the radio *MAY* need to be professionally serviced. Make sure you get an estimate for the work before authorizing - otherwise you may be spending more on a repair than the radio is worth. It is not uncommon to have to pay a diagnostic fee - that most shop will put toward the repair if allowed to do the work.

Good luck!

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try the external speaker /if that is not working you may need put in a new receiving chip it is on the right side has 10 pins.

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If the meter shows that it's receiving something, the microphone may be the problem. Another possibility is the speaker & plugging an external speaker in would confirm this. Aslo make sure the squelch control is turned all the way to the left (counter-clockwise) & the RF gain is turned to the right (clockwise).

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