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CB into a audio mixer.

Discussion in 'CB Radio Forum' started by hillmanant, Jun 24, 2013.

  1. Jun 24, 2013 #1
    hillmanant

    hillmanant Bobtail Member

    1
    0
    Jun 24, 2013
    0
    Sorry to say I'm not a driver. My question stands as a heavy equipment operator, falling pray to my drivers. I am a lifetime dozer operator(Over 20,000 hours now) and have to have a CB(cheap uniden, no gain, just squelch, and volume) to talk to my drivers dumping material. My problem is I loooooooove my custom noise canceling ear buds. Now to accommodate my love I bought a, what was named a "Joy Ride" just a product from an electronics smarty on ebay that was meant for bike riders. This product takes up to 3 audio sources(just My CB, and My Phone music for me), 3.55 mm inputs, and outputs the three into 1 3.55 mm headphone jack, into which I plug the custom ear buds. This works great I can utilize the individual volumes of both the phone and the CB to decide how loud I want to hear each one but when I talk into the CB it is UNGODLY LOUD to me in my earbuds, the playback from others talking isn't loud however, how do I quiet, stop, eliminate, this? Is it feedback? Is it bad ground? is my POS factory unidin mic amplified? I do not know how to remedy this so any help would be appreciated. I work 12-15 hours a day and will reply to and replies each night, thanks in advance for you input.
     
    hillmanant, Jun 24, 2013
    hillmanant, Jun 24, 2013
    #1
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  3. Jun 24, 2013 #2
    handlebar

    handlebar Heavy Load Member

    829
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    May 28, 2010
    Them Thar Hills, TN, ZIP EIEIO
    0
    If the radio were stock, you wouldn't be hearing yourself, so it sounds like your CB has been modified to allow what's commonly known as talkback. Techs in other radio disciplines besides CB refer to it as "sidetone".

    It's usually enabled on CBs by just installing a resistor across the external speaker and PA jacks. Unless there's some reason you really need to hear yourself (and which is probably yielding the problem you describe), I'd just have the "feature" disabled -- return the radio to stock. You'd still get the receive audio in your headphones, just not your outgoing voice.

    If you need to hear yourself, then the value of the resistor providing the talkback needs to be adjusted to something that will provide a lower level that you can live with.

    If you're going to tear into the radio yourself, just look for a resistor, probably on the solder side of the board (as opposed to the side that has most of the components on it) that's runs from the pins on one external jack to the other. Unsolder one end and insulate the free end with tape so you can re-enable it some day if this radio is going to go into some other vehicle where you need to hear yourself talk. I'd suggest putting a dab of silicone cement between the body of the resistor and the circuit board to keep it from flopping about and doing damage from the vibrations in your loader.

    If you decide you want to fiddle with the level but keep the talkback, let us know the colors of the rings on the body of the resistor so we can identify the value and suggest an alternate.

    Hope this helps. BTW, I've never been a driver myself, if you except emergency vehicles, but I've managed to stumble across the odd bit of technical stuff along the way.


    73,
    Handlebar
     
    handlebar, Jun 24, 2013
    handlebar, Jun 24, 2013
    #2
    TheDude1969 Thanks this.
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