Poste cristal pile



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Français : Poste a cristal. Pour augmenter la sensibilité d’un détecteur à cristal, en approchant électriquement ça tension de seuil vers 0 volt, une pile branchée en série ( entre le circuit d'accord et le détecteur ) fournie une tension réglable avec le + a l’anode du détecteur à cristal. Cette tension réglée doit toujours être inférieure à la tension de seuil du détecteur. Mais ce système est instable ( équilibre instable entre la tension réglable de la pile et la tension de seuil du détecteur à cristal ) et avec des pannes de contact. Ce système est abandonné.
English: A crystal radio receiver circuit. To increase the sensitivity of the crystal detector (diode), a battery was connected in series to apply a small adjustable forward bias voltage across the detector, to overcome the forward voltage drop of the detector. This voltage must always be lower than the forward voltage drop of the detector But this system is unstable and resulted in breakdown of the contact, and was abandoned.
Date 6 May 2009(2009-05-06)
Source Own work
Author F1jmm
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