Title
Vacuum tube type SR1407Catalog Number
102732238Type
Physical objectDescription
The record contain a vacuum tube type SR1407. Each tube has an eight pin connector.Date
1925 ca.Manufacturer
SylvaniaPlace Manufactured
U.S.Identifying Numbers
Model number | SR1407 | Stamped on the top of the tube |
Other number | 133 PDBII | Handwritten in green on the side of the glass |