The EF36 is receiving pentode. Philips specify this device as for general purpose voltage amplification and for use in phase inverters etc.![](../pics/acf0247a.jpg)
The unusual feature of this valve is the Italian Finance Ministry label. This one has the date stamp of Mar 5, 1952. On exhibit E1R/N the sticker has a 1941 date stamp showing that the Italians were using Philips valves during the war.![](../pics/acf0247b.jpg)
Another example with a 1948 date stamp.The classic envelope is 31 mm in diameter and, excluding the IO base pins, is 89 mm tall.References: Data-sheet, 1040 & 1043. Type EF36 was first introduced in 1940. See also 1940 adverts. |