Using a handset with 3.5 MM jack

Discussion in 'General Electronics Chat' started by Pixel_Outlaw, Jul 3, 2010.

  1. Pixel_Outlaw

    Thread Starter New Member

    Jun 30, 2010
    13
    0
    I've often wondered if it is possible to modify an older telephone handset to work with a 3.5mm audio jack. The regular telephone handset acts as both a receiver and speaker. Is is possible to do a wire modification in order to connect the device to a 3.5mm audio jack? It would be really cool to have a retro "Red Phone" attached to my computer. I don't need it to do anything more than act as a speaker and also mic. The base need not work at all. Thanks for any help here gents.
     
  2. Dx3

    Member

    Jun 19, 2010
    87
    7
    All the telephones I have met use 2 wires. The handsets use 2 wires. That means you can plug them in with a 2 wire connector.
     
  3. sceadwian

    New Member

    Jun 1, 2009
    499
    37
    Not direclty, the speaker in a telephone tends to be a high impedance type so you'd need an impedance transformer for that, I'm not sure about the mic itself depends on if it's a dynamic mic or a electret capsule, so it really depends on what the exact speaker and microphone in your handset are, this is not an uncommon project though, a quick search on Google should help you out immensely. I've seen red phones modified into cell phones.
     
  4. Dx3

    Member

    Jun 19, 2010
    87
    7
    You don't have to put the transformer (or other impedance matching device) in the hole where you want the the jack to go. You can connect the wires and add the transformer later.
     
  5. sceadwian

    New Member

    Jun 1, 2009
    499
    37
    I'm sorry Dx3 but that's funny to even think that you could fit something like that into the jack itself.
     
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