File:Silicon crystal detector.jpg
Jump to navigation
Jump to search
Size of this preview: 585 × 600 pixels. Other resolutions: 234 × 240 pixels | 468 × 480 pixels | 677 × 694 pixels.
Original file (677 × 694 pixels, file size: 127 KB, MIME type: image/jpeg)
Captions
Captions
Add a one-line explanation of what this file represents
Summary[edit]
| Description |
English: Silicon point-contact crystal detector from 1906, invented by Greenleaf Whittier Pickard. This was the first silicon diode. The brass contact point touched the surface of a crystal of silicon to form a crude Schottky junction. Silicon did not require the delicate cat's whisker contact of the galena detector. The flat piece of silicon is embedded in solder in the shallow metal cup at bottom, which can be moved horizontally to try different contact points. There is a helical spring inside the barrel of the device which puts pressure on the contact. |
| Date | |
| Source | Downloaded 2010-03-02 from Walter Wentworth Massie, Charles Reginald Underhill (1908) Wireless Telegraphy and Telephony Popularly Explained, D. Van Nostrand Co., New York, p.31, fig.16 on Google Books |
| Author | Walter Wentworth Massie and Charles Reginald Underhill |
| Permission (Reusing this file) |
Public domain in USA - published in USA prior to 1923 |
Licensing[edit]
 |
This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
|
 |
 |
This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.
|
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 11:01, 3 May 2021 | | 677 × 694 (127 KB) | Materialscientist (talk | contribs) | FFT |
| 06:01, 8 March 2010 |  | 677 × 694 (66 KB) | Chetvorno (talk | contribs) | {{Information |Description={{en|Silicon point-contact crystal detector from 1909. A variant of the Wikipedia:cat's whisker detector, this was used in early Wikipedia:crystal radio receivers during the first few decades of radio. The brass cont |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
File usage on other wikis
The following other wikis use this file:
- Usage on en.wikipedia.org
