Sensibly equivalent¶ to:
The EF98 amplifier pentode from Mullard was designed for IF amplifier use in VHF car radios. It is special in that it is designed to have the anode operating directly at vehicle battery potential. The normal operating conditions were for an anode voltage of six volts.
The maximum cathode current is given as 14 mA but in use as an IF amplifier the anode current would be around 0.6 mA and the screen current set to about 0.2 mA.
The thin glass tube envelope is 17 mm in diameter and, excluding the B7G base pins, is 47 mm tall.
References: Data-sheet, 3002 & 1040. Type EF98 was first introduced in 1957.
Absolute Maximum Operating Conditions¶
Updated January 31, 2013. shape:thin.glass.tube construction:all.glass type:pentode age:1950.1960 base:b7g heater:6.3v pins:7 pin:1.g1 pin:2.k pin:3.h pin:4.h pin:5.a pin:6.g2 pin:7.g3