Classification- Dome-type bulb of glass, filametary of carbennation Th-w a Copper ceramic base with four-prong bayonet golden pins, carbon plate triode. Application -Audio power amplifier Class A1 or Class AB1.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 parameters Filament voltage* …………………………………………………………… 10V Nominal filament current …………………………………………………… 3.2A Plate voltage ………………………………………………………………… 1250V Grid voltage** ……………………………………………………………… -200V Plate current ………………………………………………………………… 80mA Plate resistance ………………………………………………………………1.7kohms Amplification factor …………………………………………………………… 5.0 Load resistance ……………………………………………………………… 3.4 kohms Signal voltage(pk) ………………………………………………………… …69.0V Output power ………………………………………………………………… 15W Grid to plate transconductance………………………………………………3.0mA / V *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. Suggest Operating conditions and parameters Class A1 power amplifier of single tube
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Plate voltage
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1000
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1000
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1250
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V
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|
Grid voltage
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-145
|
-155
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-209
|
V
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|
Load resistance
|
6
|
9
|
16
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kohms
|
|
Plate current
|
90
|
65
|
52
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mA
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|
Signal voltage(pk)
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110
|
145
|
V
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|
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Plate resistance
|
1.7
|
1.9
|
2.1
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kohms
|
|
Output power
|
24
|
21
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24
|
W
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Lass AB1 power amplifier of push-pull
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Plate voltage
|
800
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1000
|
1000
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1250
|
V
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|
Grid voltage
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-125
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-170
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-175
|
-225
|
V
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|
Load resistance
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45
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46
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46
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66
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kohms
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|
Plate current
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80
|
70
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40
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40
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mA
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|
Signal voltage(pk)
|
177
|
240
|
V
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||
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Plate current (max. sig,)
|
177
|
240
|
V
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||
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Output power
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40
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75
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75
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75
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W
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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 ………………………………………………… 1250 volts Maximum plate dissipation …………………………………………… 75 watts Maximum plate current …………………………………………………120mA Maximum input powe of signal ………………………………………… 150 watts