Classification- Dome-type or Aubergine-type bulb of glass, a white ceramic base with four-prong bayonet golden pins, oxide coated filamentary, mesh plate or carbon plate triode.
Application -Audio frequency amplifier where power outputs of approximately 1.6 watts.
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* …………………………………………………………… 2.5V
Nominal filament current …………………………………………………… 1.5A
Plate voltage ………………………………………………………………… 250V
Grid voltage** ……………………………………………………………… …-50V
Plate current ………………………………………………………………… 34mA
Amplification factor …………………………………………………………… 3.5
Load resistance ……………………………………………………………… 3900 ohms
Grid Current ………………………………………………………… …………0.05 μ A
*Alternating-current filament supply or Direct-current filament supply. **Alternating-current filament supply is used. The grid and plate returns should be connected to a center tap on the secondary of the filament transformer. 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 simultaneous ratings
Maximum plate voltage …………………………………………………… 275 volts
Maximum plate current …………………………………………………… 10 watts