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 A or Class B or Class C.
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 : -70V
Plate current : 100mA
Amplification factor : 12
Load resistance : 7 kohms
Output power : 10W
Grid to plate transconductance : 3.8mA / V
Suggest Operating conditions and parameters Class A power amplifier of single tube (A-F)
|
Plate voltage
|
750
|
1000
|
1250
|
V
|
|
Grid voltage
|
-46
|
-61
|
-80
|
V
|
| Load resistance |
8.8
|
7.6
|
9.2
|
kohms
|
|
Plate current
|
34
|
53
|
60
|
mA
|
|
Signal voltage(pk)
|
41
|
56
|
75
|
V
|
|
Plate resistance
|
4.4
|
3.8
|
3.6
|
kohms
|
|
Output power
|
5.6
|
12
|
19.7
|
W
|
Class B power amplifier of push-pull (A-F)
|
Plate voltage
|
1000
|
1250
|
V
|
|
Grid voltage
|
-72
|
-95
|
V
|
|
Load resistance
|
6.9
|
9
|
kohms
|
|
Plate current(0 single)
|
20
|
20
|
mA
|
|
Plate current(max single)
|
320
|
320
|
mA
|
|
Signal Voltage(pk)
|
380
|
410
|
V
|
|
Output power
|
200
|
260
|
W
|
Class B power amplifier of single tube(modulate coefficient shall be 1) (R-F)
|
Plate voltage
|
1000
|
1250
|
V
|
|
Grid voltage
|
-72
|
-95
|
V
|
|
Plate current
|
130
|
106
|
mA
|
|
Signal Voltage(pk)
|
125
|
125
|
V
|
|
Output power
|
40
|
42
|
W
|
| Grid current(approx) |
5
|
1
|
mA
|
| Grid power(input)(approx) |
10
|
7.5
|
W
|
Class C power amplifier of single trbe(max modulate coefficient shall be 1)
| Plate voltage |
750
|
1000
|
V
|
|
Grid voltage
|
-200
|
-260
|
V
|
|
Plate current
|
150
|
150
|
mA
|
|
Signal Voltage(pk)
|
350
|
410
|
V
|
|
Output power
|
65
|
100
|
W
|
| Grid current (approx) |
35
|
35
|
mA
|
| Grid power (input)(approx) |
12
|
14
|
W
|
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.
Limiting Operation Conditions for Safe Nor simultaneous ratings
| Class | ClassA(A-F) | A push-pull Class B(A-F) | Class B(R-F) | Class C | |
| Maximum plate voltage | 1250 | 1250 | 1250 | 1000 | V |
| Maximum plate dissipation | 75 | 100 | 100 | 67 | W |
| maximum plate current (max sig. Per tube) | 175 | 150 | 175 | mA | |
| maximum Grid current | 50 | mA | |||
| maximum plate dissipation(in) | 175 | W | |||
| max Grid voltage | -400 | V |