Transistorradio: Forskelle mellem versioner

[[Fil:Regency transistor radio.jpg|thumb|250px|Verdens første kommercielt tilgængelige transistorradio; [[Regency TR-1]]. Kunne kun modtage [[mellembølgebåndet]]. Bemærk de små (her røde) trekanter (''CD [civil defense]'' mærker). Trekanterne viste hvor man skulle lytte i tilfælde af [[atomkrig]].<ref name="radiohistory"/>]]

[[Fil:GraetzSuperPage67.JPG|thumb|Transistorradio]]

 

Den første kommercielt tilgængelige transistorradio blev præsenteret [[18. oktober]] [[1954]] af ''Regency Division of Industrial Development Engineering Associates (IDEA) of [[Indianapolis, Indiana]]''.<ref name="TexasInstruments">Texas Instruments: [http://web.archive.org/web/20060211020429/www.ti.com/corp/docs/company/history/radio.shtml TI Information Bulletin] Citat: "...First Commercial Transistor Radio. TI Supplying Transistors for First "Pocket Size" Radio. DALLAS (October 18, 1954) - TI's part in the production of the first commercial transistorized radio receiver will be announced beginning today in newspapers throughout the country. The "pocket size" radio has four TI transistors. It also uses a TI subminiature output transformer...The receiver is being assembled and marketed by the Regency Division of Industrial Development Engineering Associates, Inc., Indianapolis. It will be available this week to the public through sales outlets in Los Angeles and New York City...TIers can justly be proud of being the first to produce a high-gain transistor at a cost permitting its application to the high-volume commercial market..."</ref> Den hed [[Regency TR-1]] og blev sat til salg [[november]] [[1954]].<ref name="radiohistory">[https://web.archive.org/web/20070225141853/http://www.etedeschi.ndirect.co.uk/tr.radio.history.htm Transistor radio mini-history] Citat: "...CD [civil defense] marks. These were in the shape of little triangular marks which should appear in all the transistor radios made up to 1963. These marks were meant to show the frequencies for the emergency tuning of the radios in case of nuclear attack from the [[USSR]]..."</ref><ref name="reyer">[http://web.archive.org/web/20110615001414/people.msoe.edu/~reyer/regency/ Website about the first transistor radio] by Dr. Steven Reyer, a Professor in the Electrical Engineering and Computer Science Department at the [[Milwaukee School of Engineering]], [http://web.archive.org/web/20110725231600/people.msoe.edu/~reyer/regency/index3.html The Breakthrough Breadboard Feasibility Model: The Development of the First All-Transistor Radio], [http://web.archive.org/web/20090616144326/people.msoe.edu/~reyer/regency/index5.html VIDEOS of the Regency TR-1 Assembly Plant – 1955]</ref>

 

 

Transistorradioer blev først alment populære i de tidlige [[1960'erne]], da prisen her faldt meget. Datidens transistorradioer blev normalt kun designet til [[mellembølgebåndet]] (ca. 540–1610 kHz) og først senere til [[kortbølgebåndet]] (mellem ca. 1.700–30.000 kHz) og [[FM-båndet]] (ca. 87,5–104 MHz).

 

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