Artifact Details

Title

Vacuum tube type 7AD7

Catalog Number

102735434

Type

Physical object

Date

1959 ca.

Manufacturer

Sylvania

Place Manufactured

U. S.

Identifying Numbers

Model number 7AD7 Printed in silver ink on top of the glass envelope.

Dimensions

overall: 3 1/8 in x 1 1/8 in x 1 1/8 in

Description

There are six tubes catalogued in this record. This is a power pentode in a glass envelope with an eight-pin loctal base. This is a spare tube for Bus Driver Arithmetic Rack S/N 10. One of the tubes has a red circle drawn around the perimeter at the top of the tube and "WAD33" handwritten around the envelope near the base in red nail polish.

Category

Component/vacuum tube

Credit

Gift of the Digital Equipment Corporation

Lot Number

X115.82