Artifact Details

Title

Vacuum tube type 12AU7

Catalog Number

102735288

Type

Physical object

Manufacturer

Sylvania

Place Manufactured

U. S.

Identifying Numbers

Model number 12AU7 Printed in silver ink around the glass envelope of 13 objects.
Model number 12AU7A Printed in silver ink around the glass envelope of two objects.

Dimensions

overall: 2 1/4 in x 7/8 in x 7/8 in

Description

This record consists of 15 tubes, two of which are labeled 12AU7A. The 12AU7 is a medium-mu twin triode in a miniature nine-pin glass envelope. The 12AU7As are made by Sylvania; the rest are from Westinghouse. Each tube in this record has a unique number stamped in yellow ink around the envelope. Six tubes have an off-white dot painted on the top near the tip; four have a yellow dot; three have an off white dot and green dot; one has an off white dot on each side of the tip; and one has two off-white dots on top of the tube and a green dot on the side of the tube near the top.

Category

Component/vacuum tube

Credit

Gift of Gene M. Amdahl

Lot Number

X1040.90