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My first working radio (created by stupidity)

Discussion in 'General Electronics Discussion' started by dietermoreno, Jun 18, 2013.

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  1. dietermoreno


    Dec 30, 2012
    My first working radio (created by stupidity).

    It plays metal 24/7! (at least it has been playing the same albumn for the past 2 hours)

    Mic cable is broken and when I connected my multimeter leads to the mic cable to test it then I started hearing music.

    The multimeter leads are totaling to 2 feet in length, and I calculated that the resonant frequency for a quarter wavelength antenna 2 feet in length is 117MHZ, and adding the coil of the analog multimeter drops the frequency into the FM band range.

    For "tuning", I turn the resistance knob. At no resistance I hear morse code beeping and no music. At 450k ohm resistance I hear music. At 4500k ohm resistance the music is quieter. At no resistance there is only morse code and no music.

    What do you think is the cause?

    Amateur created a pirate metal station?

    Neighbor left his FM modulator on in his car and he plays metal?

    video here:

    You might need to turn down the volume! Those breakdowns can hurt your ears! My ears are starting to hurt now!
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    Who cares?

    You have another broken cable acting as an antenna.
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