Title
Vacuum tube type 7AK7
Catalog Number
102735031
Type
Physical object
Description
This is a pentode vacuum tube with a loctal base. Pin 5 is missing by design. This is a spare tube for Bus Driver-Arithmetic Rack S/N 4.
Date
1938 ca.
Manufacturer
Sylvania
Place Manufactured
U. S.
Identifying Numbers
Model number |
7AK7 |
Printed in brown ink on top of the glass envelope. |
Other number |
AQ1993 |
Written in silver ink near the bottom of the glass envelope. |
Dimensions
overall: 3 1/8 in x 1 1/4 in x 1 1/4 in
Category
Component/vacuum tube
Credit
Gift of the Digital Equipment Corporation