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'Gibson Girl' Crystal Radio

Discussion in 'Home Brew' started by vu2nan, Apr 25, 2016.

  1. vu2nan

    vu2nan Active Member

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    This series-tuned, shunt-fed crystal radio was built using parts salvaged from a vintage / battered SCR - 578 lifeboat radio (popularly referred to as 'Gibson Girl').
    [​IMG]
    'Gibson Girl' Crystal Radio - Schematic

    It consists of a baseplate, antenna tuning coil, antenna tuning capacitor and a terminal strip modified to suit.

    [​IMG]
    'Gibson Girl' Crystal Radio



    The only part required to be fished out from the junkbox was a Schottky diode SB 860. It was mounted underneath the terminal strip.

    The local 612 kHz, 200 kW AM broadcast station comes in real loud using a 60' long wire antenna and sound-powered phones. Headphone current, measured using a 1mA FSD 60 Ω meter, is 600 μA.

    73,

    Nandu.
     
    #1 vu2nan, Apr 25, 2016
    Last edited: Apr 25, 2016

  2. vu2nan

    vu2nan Active Member

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    Shadetree Mechanic likes this.
  3. sunbulls

    sunbulls Sr. Member

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    Thanks for updating your old post. I love crystal radio projects like this, but not at the expense of a highly collectable Gibson Girl. All those parts can be found in most junk boxes, plus making your own coils is half the fun. Did you check the high prices Gibson Girls are bringing these days? No, I'm not talking about the ones in Las Vegas.
     
  4. vu2nan

    vu2nan Active Member

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    My pleasure, Sunbulls.

    I did feel like I was breaking a priceless heirloom which I had possessed for 40 long years.

    Last month's quote for one was $125.00!

    Regards,

    Nandu.
     

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