Sensibly equivalent¶ to:
The EBF83 is normal looking exhibit that disguises a very unusual low voltage double diode pentode valve. The 12.6 Volt anode rating, coupled with a standard 6.3 V 0.3 A heater, indicates operation from a vehicle battery and the car radio is the obvious application. This is confirmed by Mullard who describe this valve as being designed for use in hybrid car radio applications.
The mesh screen obscures the construction but through the two holes in the mesh can be seen the pentode at the bottom and the two small diode anodes above.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 60 mm tall.
References: Data-sheet & 1040. Type EBF83 was first introduced in 1957.
Absolute Maximum Operating Conditions¶
Updated January 23, 2013. shape:thin.glass.tube construction:all.glass type:double.diode.pentode age:1950.1960 base:b9a heater:6.3v pins:9 pin:1.g2 pin:2.g1 pin:3.k.s pin:4.h pin:5.h pin:6.a pin:7.a(d1) pin:8.a(d2) pin:9.g3