The EF80 internally screened pentode was a workhorse of the VHF TV receiver and was introduced in 1950. The Z152 is the same valve but made by another manufacturer.![](../pics/aaa1171a.jpg)
The internal screen obscures the electrodes.The thin glass tube envelope is 20 mm diameter and excluding the B9A base pins, is 58 mm tall.References: Data-sheet & 1040 Type Z152 was first introduced in 1950. See also 1950 adverts. |