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Classification-column-type bulb of glass, copper-ceramic base with four gold pins, oxide coated filamentary, 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.
Nominal operating conditions and parameters
Filament voltage……………………………………………………………10V
Nominal filament current……………………………………………………0.6 A
Plate voltage…………………………………………………………………1250 V
Grid voltage…………………………………………………………………－70 V
Plate current…………………………………………………………………100 mA
Amplification factor…………………………………………………………12
Load resistance……………………………………………………………7 kohms
Output power………………………………………………………………10W
Suggest operating conditions and parameters
Class A power amplifier of single tube
| 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
| 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)
| Plate voltage |
1000 |
1250 |
V |
| Grid voltage |
-72 |
-95 |
V |
| Plate current |
130 |
106 |
mA |
| Signal voltage(pk) |
125 |
125 |
V |
| Output powe |
40 |
42 |
W |
| Grid current(approx) |
5 |
1 |
mA |
| Grid power(input)(approx) |
10 |
7.5 |
W |
Class C power amplifier of single tube(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 powe………… |
65 |
100 |
W |
| Grid current(approx)……… |
35 |
35 |
mA |
| Grid power(input)(approx) |
12 |
14 |
W |
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-nor simultaneous ratings
| |
Class |
Apush-pull Class B |
Class B |
Class C |
|
| Maximum plate voltage |
1250 |
1250 |
1250 |
1000 |
volts |
| Maximum plate dissipation |
75 |
100 |
100 |
67 |
watts |
| Maximum plate current(max. sig per tube) |
|
175 |
150 |
175 |
mA |
| Maximum Grid current |
|
|
|
50 |
mA |
|
