Understanding the theory of Electronics, of a Crystal Radio Set


Today's Radios have AM, FM, Shortwave, Ham, VHF, UHF, and/ or other radio frequency bands. But; they began with the theory of electronics of the early Crystal Radio, that eventually were redesigned and developed; until they were replaced by regular AM radios.
(The different tuner circuits are using the same amplification circuit.)



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The flow of electricity through a coils effect; and the effect with a capacitor, is similar to radio waves. Using an Aerial and a Ground added, to this circuit; so, you can tune in radio wave electricity. Then; if you add an Amplifier you can hear the radio waves; but, you can even use a Crystal Diode to hear the same sound through a crystal radio earplug or headset, without adding an amplifier.
( The capacitor is using part of the wave lengths cycle: so, it becomes more tunable than the whole wave length is.)



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The Crystal Radio Set uses basic electronic parts, designed in a circuit to use radio waves, and separate the radio wave signal frequencies. With a Germanium Crystal Radio Detector, the Cats Hair Whisker wire must connect to a strong radio signal area of the Germanium Mineral, that is called, the 'sweet spot'; because the signals are the strongest, there.
(At different positions on the Germanium mineral, radio stations are stronger and louder.)



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The Simple Crystal radio; sometimes needs an additional Variable Tuning Capacitor, that is used to tune the strength of the radio wave signals. So; The Antenna's radio waves that's tuned with the additional Variable Capacitor, can be adjusted to the grounded Ground Connection, and then the radio wave frequencies can be separated individually, that are close together.
(The first Tuner Capacitor position the radio tuning reception; then the second capacitor fine tunes it.)



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By using electric voltage for electric components in the circuit, and with an Amplifier, or with more stage amplifiers; a more regular type AM Radio can be built, To receive regular AM radio frequency radio station Broadcasts. The newer regular radios still use a Arial but there is no grounded connection that is needed, and sometimes they have FM tuners, or multi band frequency widths, that also use the more complex electronic amplifier circuit; circuitry.
(The crystal radios electrons, are getting a battery power of electrons added to them; So, they move faster and the volume increases.)


AM Broadcast Transmitter| The Arkiola Crystal Radio| The Hit Parade 1 Transistor Crystal Radio