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File:Regency transistor radio.jpg

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Camera location37° 37′ 07.01″ N, 122° 23′ 13.17″ W Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo
Description
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:
GNU head 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 only

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12 November 2006

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37°37'7.014"N, 122°23'13.175"W

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Date/TimeThumbnailDimensionsUserComment
current05:23, 13 November 2006Thumbnail for version as of 05:23, 13 November 20061,444 × 2,176 (609 KB)GmaxwellClone out distraction in upper right corner.
03:48, 13 November 2006Thumbnail for version as of 03:48, 13 November 20061,444 × 2,176 (542 KB)Gmaxwell{{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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