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- صمام ثنائي (ar)
- early radio receiver component (en)
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- 1920.0 (dbd:second)
- 1930.0 (dbd:second)
- Bose's millimeter wave spectrometer, 1897. The spark transmitter is inside the box '. The galena detector is inside the horn antenna ' with a thumbscrew ' which adjusted the pressure of a metal point against the crystal. The battery ' creates a current through the detector measured by the galvanometer (en)
- Bose's galena detector from his 1901 patent. This version was deliberately made to look and function like a human eyeball, with a lens focusing millimeter waves on the galena contact. (en)
- Cartridge carborundum detector with bias battery used in vacuum tube radio from 1925 (en)
- Cat whisker detector using iron pyrite crystal (en)
- Original Pickard silicon detector 1906 (en)
- Pictorial diagram from 1922 showing the circuit of a cat whisker crystal radio. This common circuit did not use a tuning capacitor, but used the capacitance of the antenna to form the tuned circuit with the coil. (en)
- Silicon-antimony detector used in naval wireless stations 1919. The silicon crystal is mounted on an adjustable stage that can be moved in two dimensions by micrometer knobs to find sensitive spot. (en)
- After 1920, the crystal radio became a cheap alternative radio for youth and the poor. (en)
- Carborundum detector marketed to radio hobbyists, 1911 (en)
- Professional carborundum detector used in radiotelegraphy stations (en)
- Circuit of a simple crystal radio. The crystal detector D is connected between the tuned circuit L,C1 and the earphone E. C2 is the bypass capacitor. (en)
- Popular form in portable radios, with the crystal protected inside a glass tube (en)
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- ' "Perikon" zincite-chalcopyrite detector, , manufactured by Pickard's firm, Wireless Specialty Apparatus Co. ' Another form of the zincite-chalcopyrite detector, made as a sealed plugin unit, (en)
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- Crystal radio.agr.jpg (en)
- CrystalRadio.jpg (en)
- Jagadish Chandra Bose microwave apparatus.png (en)
- US Patent 755840-Jagadish Chandra Bose-Detector for electrical disturbances fig 1-3.png (en)
- Carborundum crystal detector.png (en)
- Carborundum detector & bias battery 1928.jpg (en)
- Carborundum detector 1911.jpg (en)
- Common crystal radio circuit.svg (en)
- Detecteur cristal 1.jpg (en)
- Kristallradio .jpg (en)
- Perikon crystal detector 1912.jpg (en)
- Pyrite cat whisker detector.jpg (en)
- Sealed cat whisker detector.jpg (en)
- Silicon crystal detector.jpg (en)
- Silicon-antimony crystal detector 1919.jpg (en)
- Two crystal contact detector 1919.png (en)
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- The frying ceased, and the signals, though much weakened, became materially clearer through being freed of their background of microphonic noise. Glancing over at my circuit, I discovered to my great surprise that instead of cutting out two of the cells I had cut out all three; so, therefore, the telephone diaphragm was being operated solely by the energy of the receiver signals. A contact detector operating without local battery seemed so contrary to all my previous experience that ... I resolved at once to thoroughly investigate the phenomenon. (en)
- Such variability, bordering on what seemed the mystical, plagued the early history of crystal detectors and caused many of the vacuum tube experts of a later generation to regard the art of crystal rectification as being close to disreputable. (en)
- At that time you could get a chunk of silicon... put a cat whisker down on one spot, and it would be very active and rectify very well in one direction. You moved it around a little bit-maybe a fraction, a thousandth of an inch-and you might find another active spot, but here it would rectify in the other direction. (en)
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- Crystal detector (en)
- مكشاف بلوري (ar)
- Detector de galena (ca)
- Hrotová elektroda (cs)
- Kristaldetektilo (eo)
- Spitzendiode (de)
- Detector de bigotes de gato (es)
- Diode à pointe (fr)
- 鉱石検波器 (ja)
- Dioda ostrzowa (pl)
- Kristaldetector (nl)
- Puntcontactdiode (nl)
- Detektor kryształkowy (pl)
- Кристаллический детектор (ru)
- Точечный диод (ru)
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