Images(5)

Tube, Electron

Object number2012.114.13 a,b

Manufacturer CBS-Hytron

Manufacturer Columbia Broadcasting System, Inc.

OriginDanvers, MA

MediumMetal/Plastic/Paper

Credit LineGift of Robert Kruszewski

DescriptionElectron tube with box. Glass tube with nine metal prongs on black plastic base. Box is black, white, and red.Dimensions(a) Height: 2 ; Circum: 2.625
(b) H: 3.125 ; Width: ~1
Marks(a)
Printed in grey on glass: "12 / AU7A".

(b)
Printed on one side: "CBS / tube"; on opposite side is manufacturer information "CBS-HYTRON / DANVERS, MASSACHUSETTS, U.S.A. / A Division of / Columbia Broadcasting System, Inc.".

Stamped on opened-end of flap: "12AU7A"; handwritten above in pencil: "WEAK".

Good Housekeeping seal on base.
Historical NotesPart of a collection of television repair equipment documenting donor Robert Kruszewski's father Charles J. Kruszewski’s side job as a television and radio repairman post WWII. Charles used the G.I. Bill to enroll in a home study course on practical television and radio repair. The course was offered by National Radio and Television Repair in Washington, D.C. Working on nights and weekends after his regular job at General Motors was done, he serviced many neighbor’s equipment in the Ninth Ward of Lawrenceville. The donor remembers going out on repair calls with this father and bringing back the more difficult cases to his home repair shop. As televisions became more complicated this type of home repair died out.

Previous owner Charles J. Kruczewski

Related institution General Motors Company

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