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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Description Regency 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.
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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 < [email protected] > 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 only http://www.gnu.org/licenses/old-licenses/fdl-1.2.html GFDL 1.2 GNU Free Documentation License 1.2 true true |