Classification-column type bulb of glass, copper ceramic base with four gold pins , oxide coated filamentary, carbon plate, triode.
Application-Audio power amplifier A-F, R-F of class B or R-F of class C.
Dimensions-Dimensions, outline diagrams of the tube and bases, and the arrangement of electrode connections to the base terminals are shown in Figures 1 and 2.

Fig.1 　　　　　　　　　　　Fig.2

Nominal operating conditions and parametersFilament voltage……………………………………………………………10.0V
Nominal filament current……………………………………………………0.6 A
Plate voltage…………………………………………………………………900 V
Grid voltage…………………………………………………………………20 V
Plate current………………………………………………………………… 110 mA

Suggest operating conditions and parameters A-F of Class B power amplifier ( two tube )

R-F of classB power amplifier of push-pull