翻訳と辞書 Words near each other ・ CK Birla ・ CK Birla Group ・ Ck Calvin Klein ・ CK College of Engineering and Technology ・ CK Deluxe ・ CK Hutchison Holdings ・ CK Life Sciences ・ CK Transit ・ Ck vodka ・ CK Vulpeculae ・ CK's Supermarkets ・ CK-12 Foundation ・ Ck1 ・ CK2 ・ CK5 ・ CK722 ・ CKA ・ CKAC ・ CKAG-FM ・ CKAJ-FM ・ CKAL-DT ・ CKAN ・ CKAP-FM ・ CKAP2 ・ CKAP4 ・ CKAP5 ・ CKAR-FM ・ CKAT ・ CKAU-FM ・ CKAW-FM Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク CK722 ： ウィキペディア英語版 CK722 The CK722 was the first low-cost junction transistor available to the general public. It was a PNP germanium small signal unit. Developed by Norman Krim, it was introduced by Raytheon in early 1953 for $7.60 each; the price was reduced to $3.50 in late 1954 and to $0.99 in 1956. Norm Krim selected Radio Shack to sell the CK721 and CK722 through their catalog. Krim had a long-standing personal and business relationship with Radio Shack.〔(【引用サイトリンク】first=Jack )〕 The CK722s were selected "fall out" from the Raytheon's premium-priced CK721 (which are fallouts from CK718 hearing-aid transistors). Raytheon actively encouraged hobbyist with design contest and advertisements.〔 Raytheon sponsored a design contest for applications that used the CK722 transistor. The top prize was $5,000.〕〔CK722 advertisement〕 In the 1950s and 1960s, hundreds of hobbyist electronics projects based around the CK722 transistor were published in popular books and magazines. Raytheon also participated in expanding the role of the CK721/CK722 as a hobbyist electronics device by publishing "Transistor Applications" and "Transistor Applications- Volume 2" during the mid-1950s. == Construction of the CK722 Transistor == The original CK722 were direct fallouts from CK718 hearing aid transistors, that did not meet specifications. These fallouts were later stamped with CK721 or CK722 numbers based on gain, noise and other dynamic characteristics. Early CK722's were plastic encapsulated and had a black body. As Raytheon improved its production of hearing aid transistors with the introduction of the smaller CK78x series, the body of the CK721/CK722's was changed to a metal case. Raytheon, however kept the basic body size and used a unique method by taking the smaller CK78x rejects and inserting it into the larger body and sealing it. The first metal-cased CK721/CK722's were blue and the later ones were silver. More details of this can be found in Jack Ward's website, Semiconductor Museum or the CK722 Museum- see external link reference below. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「CK722」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.