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6S31B
631

General

Triode  used as a low frequency amplifier
Envelope: subminiature glass.
Mass 4.5 g.

Lead diagram
 

General characteristics:

Filament (heater) current, mA

22022

Anode current, mA

4010

Reverse grid current, mkA

<0.2

Dissipate cathode-heater current, mkA

<20

Mutual conductance, mA/V

18

Gain coefficient

175

Vibration noise (at RA=2 kΩ), mV

<15

Inter electrode capacitance, pF:

input

4.10.9

output

<1.5

transfer

3.8

Operation time, h

>2000

Limited operating values:

Filament voltage, V

5.7 to 7.0

Anode voltage, V

100

Cathode heater voltage, V

200

Cathode current, mA

60

Anode dissipation, W

2.5

Resistance in grid circuit, MΩ

1

Tube temperature, 0C

220

Operating environmental conditions :

Acceleration of vibration loads, g

15

Acceleration of multiple impacts, g

150

Acceleration of single impact, g

500

Continuous acceleration, g

100

Ambient temperature, ?

60 to +125

Relative humidity at up to 40C, %

98


Plate-grid and plate curves of triode


Plate curves                       Plate-grid curves