Sensibly equivalent¶ to:
The EC70 is a sub miniature VHF/UHF amplifier triode that was introduced in 1950 as part of the then new miniature valve series. It was designed as an oscillator for use at up to 500 MHz.
The anode is 13 mm long and the control grid has a heat sinking fin added at the top.
Thanks to John Sykes for sending the photographs.
The thin glass tube envelope is 9 mm in diameter, and excluding the B8D base wires is 37 mm tall.
References: Datasheet & 1040. Type EC70 was first introduced in 1950.
Absolute Maximum Operating Conditions¶
Updated August 13, 2015. shape:thin.glass.tube construction:all.glass type:triode age:1950.1960 base:b8d heater:6.3v pins:8 pin:1.g1 pin:2.a pin:3.h pin:4.ic pin:5.- pin:6.h pin:7.k pin:8.ic