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I want to "lock" a radio to one station...

Discussion in 'Electronic Basics' started by mom2thegirls, Jan 18, 2005.

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  1. mom2thegirls

    mom2thegirls Guest

    Is there a way to "lock" a radio, in this case a rather basic stereo
    system, to only play one station. I don't want the tuner dial to move
    at all. Is there a way to disconnect the tuner dial but still have the
    radio play? Its for a practical joke.

  2. Joel Kolstad

    Joel Kolstad Guest

    Sure... in most radios that come with a mechnical tuning indicator and a
    dial, the knob is moving a cog that has an elastic belt attached that is
    connected to the tuning indicator and a variable capacitor. If you can
    mechcnially remove the connection to the tuning capacitor without losing
    tension in the mechanical system, you're set.

    If not, you'd have to essentially solder in a new varaible capacitor and
    electrically disconnect the old one; harder but perhaps still worth doing.

    On most digitally tuned radios, you'd be out of luck. However, some
    inexpensive radios have a digital frequency display, but actually still use
    variable capacitor tuning as described above and could be modified likewise.
    The giveaway is usualy that the 'truly digitally tuned' radios almost always
    have preset whereas the 'fakes' don't, and the 'fakes' also tend to
    sometimes switch between displaying two different frequencies, e.g.,

    But ifyou're playing to hack apart the radio anyway, you might as well just
    get a cheap old mechanically tuned radio from, e.g., Good Will for a couple
    of bucks.

    ---Joel Kolstad
  3. Clarence_A

    Clarence_A Guest

    My radio has a panel lock! Just flip the switch!
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