How a Crystal Earpiece works

Crystal- or Piezo-Earpieces are today only used for crystal-radios because they claim to have high sensitivity and present only a negligible load of over 10 Mohms. Well can this really be true? Roger tells the truth about the real impedance or load-resistance of crystal earpieces. Forum: https://forum.kainkalabs.com/forumdisplay.php?fid=3 Shop: http://www.ak-modul-bus.de/ twitter: http://twitter.com/kainkalabs facebook: http://facebook.com/kainkalabs

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