Semiconductor history: Difference between revisions
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=The use of natural semiconductors= | =The use of natural semiconductors= | ||
[[Category:ACE R&D]] | |||
[[File:Tins.jpg|right|frame|500px|Tins for detector crystals for radios circa 1920 - although branded with lots of made up names, most of the crystals were in fact galena]] | [[File:Tins.jpg|right|frame|500px|Tins for detector crystals for radios circa 1920 - although branded with lots of made up names, most of the crystals were in fact galena]] | ||
