Title
Vacuum tube type 12B4ACatalog Number
102783092Type
Physical objectDescription
The record contains a 9 pin miniature vacuum tube, type 12B4A.Manufacturer
Radio Corporation of America (RCA)Place Manufactured
U.S.Identifying Numbers
| Model number | 12B4A | Printed in white at the top of the tube |
| Other number | 57-48 | Printed in white in the center of the tube |
Dimensions
overall: 2 1/2 in x 3/4 in x 3/4 inCategory
Component/vacuum tube