Classification-Globe-type bulb of glass, a white ceramic base with four-prong bayonet gold pins , oxide coated filamentary, solid plate, mesh plate triode.
Application-Voice frequency and carrier-frequency amplifier .Other applications where small power output are required.
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.

Nominal operating conditions and parameters

Filament voltage……………………………………………………………4.5 V*
Nominal filament current……………………………………………………1.0 A
Plate voltage…………………………………………………………………160 V
Grid voltage…………………………………………………………………－12 V
Plate resistance…………………………………………………………5.3 kohms
Plate current………………………………………………………………9.9 mA
Amplification factor…………………………………………………………6.2

* Direct-current filament supply is used. The grid and platter returns are connected to the negative end of the filament.

Characteristics-Average characteristics

Figure 3. shown typical curves of plate currents of grid voltage for several values of plate voltages. It is alternating-current filament supply.

Fig.3

Limiting Operation Conditions for Safe Nor-nor simultaneous ratings

Maximum plate voltage……………………………………………… 190 volts
Maximum plate current……………………………………………………15mA