NDLI: Development of the RCA 25-inch 90-degree rectangular color picture tube

Content Provider	IEEE Xplore Digital Library
Author	Morrell, A. M. Hardy, A. E.
Copyright Year	1965
Abstract	The new RCA-25AP22 25-inch rectangular 90-degree shadow-mask color picture tube represents a basic advancement in the art of picture-tube development. The result of an extensive developmental program, the 25AP22 features the new look in screen shape and shorter over-all length, with no sacrifice in the performance potential and reliability features established by the earlier RCA 21-inch 70-degree color tubes. The development of a tube having a new shape or increased picture size is, in itself, a relatively simple accomplishment. Of far greater complexity is the design and development of a new tube type having these features, as well as high performance and reliability, together with economics of manufacture. Part I of this paper discusses the innovations made in the design and geometry of the 25AP22. These improvements include a new bulb design, a four-point mask-support system, and an electron-gun structure having a reduced size. These advances, coupled with the improved efficiency of the RCA all-sulphide screen described in Part II, made the 25AP22 an outstanding contribution to the color television industry.
Starting Page	15
Ending Page	22
Page Count	8
File Size	2272951
File Format	PDF
ISSN	00189308
Volume Number	BTR-10
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1964-11-01
Publisher Place	New York, U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electron tubes Glass Seals Shape Neck Color Assembly
Content Type	Text
Resource Type	Article
Subject	Engineering Electrical and Electronic Engineering Media Technology

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