* [Radio Shack Catalogs|http://www.radioshackcatalogs.com/] - Excellent collection of Radio Shack print catalogs from the first 1939 catalog through 2003.
* [Semiconductor Museum|http://semiconductormuseum.com/Museum_Index.htm] - Great collection of photographs and oral histories of the developments of semiconductors. For example, an oral history describes the development of the 2N2222, which was released in 1962 and is still being designed into products today.
* [Southwest Museum of Engineering,Communications and Computation|http://www.smecc.org/] - A very extensive collection of physical and online resources.
* [Spark Bang Buzz|http://sparkbangbuzz.com/] - While not truly history, it does tell you how to build many devices from history. Projects include several based on zinc negative resistance, copper oxide thermo electric generator, magnetic amplifiers, an 80m transmitter built around a 2N3904, an alcohol flame triode amplifier, home made CRT tube, arc transmitters, home made coherer, home made vacuum tube triode, sound modulated LED, laser, and flashlight, etc. Fun stuff!
+* [Survivor Library|http://www.survivorlibrary.com/index.php/library-download] - Old books covering a WIDE range of subjects including radio, telegraph, and telephone.
* Telharmonium - The Telharmonium (also known as the Dynamophone) was an early electronic musical instrument, developed by Thaddeus Cahill in 1897. The Telharmonium was intended to be listened to using telephone receivers.
* [Wikipedia|http://en.wikipedia.org/wiki/Telharmonium]
* [Magic Music From The Telharmonium Documentary|http://www.youtube.com/watch?v=PPlbXl81Rs0] on ~YouTube
* [Tesla Wardenclyffe Project|http://www.teslascience.org/] - mission is the preservation and adaptive reuse of Wardenclyffe, the century-old laboratory of electrical pioneer Nikola Tesla located in Shoreham, Long Island, New York.
* [Tube Books dot Org|http://www.tubebooks.org/] - Herein you will find a collection of vintage engineering texts, vacuum tube datasheets, and other obsolete information, presented free of charge and without annoying advertisements.
* http://www.pat2pdf.org/ - Free online conversions of USPTO patent images to pdf for easy viewing. Just supply the patent number.
* [Watthourmeters.com|http://watthourmeters.com/] - An online reference to US made watthour meters.
* [Weston Engineering Notes|http://www.slbench.com/Home/westonengineeringnotes-1] - "Weston Electrical Instrument Corporation, founded in 1888, is responsible for many important developments in the electrical engineering field. Several years ago, I came across a 3 year collection of Weston Engineering Notes starting in 1946. This was a far different time and many of the things we take for granted today weren't even dreams of the future yet. Clicking the above logo will give you an enlarged sketch of an engineer's desk. Engineering and physics books (complete with log tables) close at hand. The ever present slide rule, a sharp pencil, drafting triangle and the all-important eraser being important tools of the trade. A tube and a large can capacitor are part of a current project. An analog meter waiting to prove or dis-prove the latest theory. The pipe to be used while pondering the latest developments and speculating about the future."
-NOTE - Due to wiki spam, only registered users can edit pages. If you have a scan of a manual that you'd like posted
, please [email it to me|mailto:harold@hallikainen.org].
+NOTE - Due to wiki spam, only registered users can edit pages. Email me (mailto:harold@hallikainen.org) to register for page edits and file uploads
. If you have a scan of a manual that you'd like me to post
, please [email it to me|mailto:harold@hallikainen.org].
-Scanned contributions are most appreciated! Ideally, they should be PDF files using 300dpi. Use an appropriate bit depth for each page. If a page is just text or line art, use 1 bit per pixel. For black and white photography, use 8 bits per pixel. For spot color, try to use 8 bits per pixel. For full color, use 24 bits per pixel. Very large files (more than 50M) should be broken into sections (pages 1 through something in one file, more pages in another file, etc.). Finally, try running "Paper Capture" on the files with the OCR text "in the background." Use File - Preferences - Paper Capture - Original Image With Hidden Text. The user sees the scanned image. The OCR text is available to copy and paste and to search engines.
If you did not scan the material yourself, please obtain permission and credit the person who did. If you find appropriate information on another website, it'd be best to link to that site instead of copying material from it (especially without permission).
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