Classification-Aubergine-type bulb of glass, a four-prong bayonet pin tube, oxide coated filamentary,mesh plate, canbon plate triode.
Application-Audio frequency amplifier where undistorted power output 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 1and 2 .
As Single-Tube Class A1 Amplifier
Filament voltageˇˇˇˇˇˇˇˇ....2.5 V *
Nominal filament currentˇˇˇˇˇ. 1.5 A
Plate voltageˇˇˇˇˇˇˇˇˇˇ. 250 V
Grid voltageˇˇˇˇˇˇˇˇˇˇ.. ¨C50V**
Plate currentˇˇˇˇˇˇˇˇˇˇ...36 mA
Plate resistanceˇˇˇˇˇˇˇˇˇˇ1610 ohms
Amplification factor***ˇˇˇˇˇˇ.3.5
Load resistanceˇˇˇˇˇˇˇˇˇ..3900 ohms
Grid currentˇˇˇˇˇˇˇˇˇˇˇ0.05¦ĚA
As Push-Pull Class AB2 Amplifier ( Two Tubes )
| |
Fixed Bias |
Self-bias |
| Filament voltage ( A.C. ) |
2.5 V |
2.5V |
| Plate voltage ( Maximum ) |
275V |
275V |
| Grid voltage |
¨C68V** |
|
| Self-Bias Resistor |
|
775ohms |
| Zero-Signal Plate Current |
28 mA |
72 mA |
| Maximum-signal Plate Current |
138 mA |
90 mA |
| Load resistance |
3200 ohms |
5060ohms |
| Total Harmonic Distortion |
5% |
5% |
| Power Output |
18Watts |
12Watts |
*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 plate returns areconnected to the negative end of the filament.
Characteristics-Average characteristics
Figure 3.shown typical curves of plate currents as a function of grid voltage for several values of plate voltages. It is alternating-current filament supply.
Fig.3
Limiting Operation Conditions for Safe Operation-nor simultaneous ratings
Maximum plate voltage ˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇ275 volts
Maximum plate dissipation ˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇ.10 watts |
