Quantity in Stock
11
Location
Box E.1
The EBF89 features two signal diodes and a variable μ pentode in the one envelope and sharing a common cathode.
The diode anodes are small plates placed either side of an extended cathode tube.
The variable μ characteristic is indicative of a device designed to have its gain controlled by an AGC system.
This places this valve in service as a final IF amplifier and detector.
The high impedance of the pentode supports the case for use with a tuned circuit connected to the anode.
Type EBF89 was first introduced in 1958.
Pin 1: Grid Number 2
Pin 2: Grid Number 1
Pin 3: Cathode, Internal Screen
Pin 4: Heater
Pin 5: Heater
Pin 6: Anode
Pin 7: Anode (D1)
Pin 8: Anode (D2)
Pin 9: Grid Number 3
Specifications
Vf : 6.3v
If : 300mA
Va : 250v
Vs : 100v
Vg : -2v
mAa : 9mA
mAs : 2.7mA
Ra : 1MΩ
Substitutes
6DC8
6FD12
10FD12 (Different Filament Voltage)
UBF89 (Different Filament Voltage)
Datasheets
Thanks to the Valve Museum for the information collected here.