File:Regency transistor radio.jpg
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Camera location | 37° 37′ 07.01″ N, 122° 23′ 13.17″ W | View this and other nearby images on: OpenStreetMap | 37.618615; -122.386993 |
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DescriptionRegency transistor radio.jpg |
English: Regency TR-1 transistor radio, the first commercial transistor radio, which debuted October 18, 1954. Designed by Texas Instruments and IDEA, the TR-1 had a superheterodyne circuit with only 4 transistors: a combined local oscillator/mixer, two IF amplifiers, and one audio amplifier. Within one year of release, TR-1 sales approached 100,000. The transistor radio was the most popular communications device in history, with billions manufactured during the 1960s and 1970s. Courtesy of Steve Kushman. |
Date | GMT |
Source | Photo by uploader, taken at The History of Audio: The Engineering of Sound, an exhibition of the San Francisco Airport Museums[1] in SFO Airport, Terminal 3 from 2006-09 to 2007-05. |
Author | Gregory F. Maxwell <gmaxwell@gmail.com> PGP:0xB0413BFA |
Permission (Reusing this file) |
GFDL-1.2 |
I, the copyright holder of this work, hereby publish it under the following license:
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 only as published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. | 1.2 onlyhttp://www.gnu.org/licenses/old-licenses/fdl-1.2.htmlGFDL 1.2GNU Free Documentation License 1.2truetrue |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 05:23, 13 November 2006 | 1,444 × 2,176 (609 KB) | Gmaxwell (talk | contribs) | Clone out distraction in upper right corner. | |
03:48, 13 November 2006 | 1,444 × 2,176 (542 KB) | Gmaxwell (talk | contribs) | {{Location dec|37.618615|-122.386993|scale:1000}} {{Information |Description=Regency TR-1 transistor radio circa 1956. Courtesy of Steve Kushman. |Source=Photo by uploader, taken at ''The History of Audio: The Engineering of Sound'', an exhibition of the |
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