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ID = 4225
Tube type:  Vacuum Pentode 
Identical to 2DF4

Base Noval, 9 pin miniature (USA pico-9) B9A
Filament Vf 2.5 Volts / If 0.345 Ampere / Direct
Description Heizfaden mit Mittenanschluss, bei Parallelschaltung: Uf= 1,25V If= 0,69A. 
Tube prices 1 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   

2df4_socket.gif 2DF4: GE 1973
Philipp Mueller

Just Qvigstad
Usage in Models 1= 1965

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):1

Collection of



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