God information om anvendelse af dimser med negativ modstandskarakteristikker, før de blev opdaget i tunneldioder i 1957: Cristadyne: Semiconductor archaeology or tribute to unknown precursorsArkiveret 17. marts 2013 hos Wayback Machine Citat: "...In 1923, Oleg Losev [O. V. Lossev, Lossew] (1903-1942) ( See link below ) managed to make a high frequency generator using such a detector. But it was polarized. This indicates that this diode had a characteristic curve in which a negative slope was present. And this makes one think of the tunnel effect diode invented a half a century later...These layouts where part of what one called CRYSTADYNE [eller Cristadyne, Crystodyne ] systems. But in those days, the technical performance and industrial ease of the new increasing valve technology made these layouts to be ignored, and then forgotten..."
americanradiohistory.com
G. W. Pickard, "How I Invented the Crystal Detector". Electrical Experimenter, vol. VII, no. 4, p. 325, Aug. 1919 Citat: "...In 1898, when my work in Radio-communication began, there was but one detector—the coherer...In the period 1902 to 1906, I tested many different minerals and combinations, including magnetite, pyrite, galena, molybdenite, silicon and zincite. Much development was also required on holders for these minerals...31,250 Crystal Detectors Invented. A list of the several thousand materials I have tested would make dry reading. Suffice it to say that I have found some tzvo hundred and fifty minerals and furnace products which make operative detectors, cither against metallic contacts, or in combination with other minerals. The possible combinations of these two hundred and fifty substances amounting to some 31,250, pairs, have all been tested by me, or by my assistants, and many hundred useful pairs have been found...", backup
beatriceco.com
beatriceco.com: Bell Labs – The Transistor – Other Claims to the InventionArkiveret 21. december 2013 hos Wayback Machine Citat: "...This effect, he stated, was discovered by Dr W. H. Eccles in 1910, and remarked: “It is hard to realize that it took about ten years for practical active crystal-diode circuits to appear, in spite of Ditcham's reminder—circuits that included both RF and AF amplification...Most of the credit for creating practical devices [of this kind] goes to O. V. Lossev of Russia, whether or not he knew of Eccles' pioneer work a decade earlier..."
earlyradiohistory.us: Radio News, September, 1924, pages 294-295, 431: The Crystodyne Principle Citat: "...SEVERAL experimenters have observed that some contacts, such as crystal and metal or crystal and carbon generally employed as detectors may produce undamped oscillations of any frequency, exactly as the vacuum tube oscillator. The same contact may also be utilized as an amplifier. Oscillating crystals are not new since they were investigated as far back as 1906 by well known engineers, but it was not until lately that a Russian engineer, Mr. O. V. Lossev, succeeded in finding some interesting uses for oscillating crystals..."
earlyradiohistory.us: Radio News, September, 1924, page 291: A Sensational Radio Invention By HUGO GERNSBACK Citat: "...Stated in a few words, the invention encompasses an oscillating crystal...In other words, THE CRYSTAL NOW ACTUALLY REPLACES THE VACUUM TUBE. That this is a revolutionary radio invention need be emphasized no further. [Her var Hugo Gernsback dog langt forud for sin tid]...We can not only detect with the crystal, but we can also amplify with it...we can now also transmit with the Crystodyne, and, as a matter of fact, a number of students in Russia have actually sent messages with such sets over distances of more than three-quarters of a mile during the past few months..."
web.archive.org
G. W. Pickard, "How I Invented the Crystal Detector". Electrical Experimenter, vol. VII, no. 4, p. 325, Aug. 1919 Citat: "...In 1898, when my work in Radio-communication began, there was but one detector—the coherer...In the period 1902 to 1906, I tested many different minerals and combinations, including magnetite, pyrite, galena, molybdenite, silicon and zincite. Much development was also required on holders for these minerals...31,250 Crystal Detectors Invented. A list of the several thousand materials I have tested would make dry reading. Suffice it to say that I have found some tzvo hundred and fifty minerals and furnace products which make operative detectors, cither against metallic contacts, or in combination with other minerals. The possible combinations of these two hundred and fifty substances amounting to some 31,250, pairs, have all been tested by me, or by my assistants, and many hundred useful pairs have been found...", backup
God information om anvendelse af dimser med negativ modstandskarakteristikker, før de blev opdaget i tunneldioder i 1957: Cristadyne: Semiconductor archaeology or tribute to unknown precursorsArkiveret 17. marts 2013 hos Wayback Machine Citat: "...In 1923, Oleg Losev [O. V. Lossev, Lossew] (1903-1942) ( See link below ) managed to make a high frequency generator using such a detector. But it was polarized. This indicates that this diode had a characteristic curve in which a negative slope was present. And this makes one think of the tunnel effect diode invented a half a century later...These layouts where part of what one called CRYSTADYNE [eller Cristadyne, Crystodyne ] systems. But in those days, the technical performance and industrial ease of the new increasing valve technology made these layouts to be ignored, and then forgotten..."
beatriceco.com: Bell Labs – The Transistor – Other Claims to the InventionArkiveret 21. december 2013 hos Wayback Machine Citat: "...This effect, he stated, was discovered by Dr W. H. Eccles in 1910, and remarked: “It is hard to realize that it took about ten years for practical active crystal-diode circuits to appear, in spite of Ditcham's reminder—circuits that included both RF and AF amplification...Most of the credit for creating practical devices [of this kind] goes to O. V. Lossev of Russia, whether or not he knew of Eccles' pioneer work a decade earlier..."
