572B type electron tube
572B electron tube is a broken-line, direct-heating thorium-coated tungsten cathode, a graphite grid, a natural cooling or forced air-cooling glass-shell structure triode, the maximum anode dissipation power is 125W, the output power can be up to 300W if the frequence is not more than 30MHz. This electron tube is suitable for power amplification or oscillation in the industrial heating field, and the quality is reliable.
The main parameters 1:
General performance and mechanical performance |
Parameter |
Unit |
Weight |
120 |
g |
Hight |
≤170 |
mm |
Installation location |
Axial vertical installation |
|
Cooling condition |
Natural cooling or forced air cooling |
|
Service life |
≥500 |
h |
Electrical parameters Rated value |
Rated value |
Unit |
Filament voltage |
6.3 |
V |
Filament current |
4 |
A |
Input capacitance Ckg |
6 |
pF |
Output capacitance Cka |
0.8 |
pF |
Cross-circuit capacitance Cga |
6 |
pF |
Cathode-grid insulation resistance |
≥200 |
MΩ |
Anode- grid insulation resistance |
≥100 |
MΩ |
Output Power |
0.3 |
KW |
Amplification factor |
190 |
|
Measured when the positive current is 0.05A, and the positive pressure is 2KV and 1.5KV. |
Electric parameter /limit value |
Min. |
Max. |
Unit |
Filament voltage |
|
6.6 |
V |
Anode DC voltage |
|
1.25 |
KV |
Anode DC current |
|
210 |
mA |
Anode dissipation power |
|
125 |
W |
Highest gate current |
|
50 |
mA |
Maximum operating frequency |
|
30 |
MHZ |
The highest temperature at the anode seal |
|
220 |
℃ |
The highest temperature at the stem seal |
|
180 |
℃ |
Maximum temperature of glass bulb |
|
200 |
℃ |
The main parameters4:Typical working state-single tube class A amplification
Filament voltage |
6.3 |
V |
Anode voltage |
750 |
V |
Grid voltage |
20 |
V |
Anode current (zero signal) |
130 |
mA |
Anode current (maximum signal) |
210 |
mA |
Grid audio peak voltage |
60 |
V |
Effective load resistance |
5 |
KΩ |
Output power (when Dtot=5%) |
40 |
W |
Filament voltage |
6.3 |
V |
Anode voltage |
1000 |
V |
Grid voltage |
20 |
V |
Anode current (zero signal) |
75 |
mA |
Anode current (maximum signal) |
300 |
mA |
Grid audio peak voltage |
195 |
V |
Effective load resistance |
8 |
KΩ |
Output power (when Dtot=5%) |
150 |
W |
Filament voltage |
6.3 |
6.3 |
6.3 |
V |
Anode voltage |
1250 |
1500 |
2000 |
V |
Anode current |
140 |
173 |
200 |
mA |
Negative grid bias |
-50 |
-70 |
-70 |
V |
Grid current |
45 |
40 |
30 |
mA |
RF grid peak voltage |
140 |
175 |
190 |
V |
Grid excitation power |
5.6 |
7 |
5.5 |
W |
Anode output power |
135 |
200 |
330 |
W |