Classification-column type bulb of glass, copper ceramic base with four gold pins , oxide coated filamentary, 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.
Nominal operating conditions and parameters
Filament voltage”””””””””””””””””””””””10.0V
Nominal filament current””””””””””””””””””””0.6 A
Plate voltage”””””””””””””””””””””””””1250 V
Grid voltage”””””””””””””””””””””””””£200 V
Plate current”””””””””””””””””””””””””80 mA
Plate resistance”””””””””””””””””””””””1.7kohms
Amplification factor””””””””””””””””””””””” 5.0
Load resistance””””””””””””””””””””””” 3.4 kohms
Signal voltage(pk)””””””””””””””””””””””””69.0V
Output power”””””””””””””””””””””””””15W
Suggest operating conditions and parameters
Class A1 power amplifier of single tube
| Plate voltage |
1000 |
1000 |
1250 |
V |
| Grid voltage |
-145 |
-155 |
-209 |
V |
| Load resistance |
6 |
9 |
16 |
kohms |
| Plate current |
90 |
65 |
52 |
mA |
| Signal voltage(pk) |
|
110 |
145 |
V |
| Plate resistance |
1.7 |
1.9 |
2.1 |
kohms |
| Output powe |
24 |
21 |
24 |
W |
lass AB1 power amplifier of push-pull
| Plate voltage |
800 |
1000 |
1000 |
1250 |
V |
| Grid voltage |
-125 |
-170 |
-175 |
-225 |
V |
| Load resistance |
4.5 |
4.6 |
4.6 |
6.6 |
kohms |
| Plate current |
80 |
70 |
40 |
40 |
mA |
| Signal voltage(pk) |
177 |
240 |
|
|
V |
| Output powe |
40 |
75 |
75 |
115 |
W |
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”””””””””””””””””””””” 1250 volts
Maximum plate dissipation”””””””””””””””””””””75 watts
Maximum plate current ”””””””””””””””””””””””120 mA
Maximum input powe of signal ”””””””””””””””””””” 150 V
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