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Headset boost

Discussion in 'Hobby Electronics' started by Daniel Inston, Nov 19, 2003.

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  1. I've attacked an old cordless phone and wired in a headset so that I can use
    it hands free. I simply disconnected the phones mic and speaker and wored
    them up to a headset socket.
    While the mic works well; other party can hear me, I find that the earpiece
    of the headset, even with the volume up loud is not quite enough if there is
    any background noise.
    So what I want to do is boost the phones speaker volume slightly so that the
    volume control on the headset has some range to it. I thought that a garden
    variety transistor might do it, along with a resistor or two.
    Problem is - I dont know how - I can only follow instructions when it comes
    to this sort of thing - so I am hoping that someone here will provide some
    help.

    Thanks in advance.
    Daniel Inston
     
  2. Actually, the impedance is the same - or at least within 1 or 2 ohms - they
    are both about 33-35 ohms.
    Speaker in phone is very small - so I would say that it is not a moving
    coil - however I am not sure how to tell.
    I really only want to boost the output a little - maybe double it - so that
    the volume control has some adjustment. At the moment it is just a little
    too quiet when turned up full.

    Thanks
    Daniel
     
  3. Lord Garth

    Lord Garth Guest


    If you have some power available, use an LM386...it's easy and cheap.
     
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