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Glass Triode(1-30kw)

572B

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

The main parameters2:

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

Anode- grid insulation resistance

≥100

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.

The main parameters3

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

Output power (when Dtot=5%)

40

W

The main parameters5:Typical working state-double-tube class AB amplification

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

Output power (when Dtot=5%)

150

W

The main parameters6:
Typical working status-RF power amplifier and oscillator Class C telegraph status

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



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