Title
Vacuum tube type IU4Catalog Number
102729040Type
Physical objectDescription
This tube has 7 connector pins. "Rad-Tel Tube Co." and " IRVINGTON, N.J." are printed in white on the side of the tube.Manufacturer
Rad-TelPlace Manufactured
Irvington, N.J., U.S.Identifying Numbers
Other number | 7/55 | Printed in white on side of tube |
Part number | IU4 | Printed in grey on side of tube |