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Voltage Tetrode ·Tetrode

S22

Screen-grid amplifier with high amplification and mutual conductance for receiver signal amplification. Its screened structure improves gain and stability.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B4
Base pins
4
Nominal heater
2 V / 200 mA

Description

Screen-grid amplifier with high amplification and mutual conductance.

Socket description

European 4-pin base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B4
Base pins
4
Nominal heater voltage
2 V
Nominal heater current
200 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Tetrode

X-ray radiationInterelectrode capacitances
Plate resistance
200000 Ω
Amplification factor
350
Max plate voltage
150 V

Published maximum ratings and characteristics audited; remaining useful numerical data retained in parameter table.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1955 Marconi

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

  • z FILAMENT VOLTS = [1]

    2

    z FILAMENT VOLTS = 2-0 MAX.

  • z FILAMENT VOLTS = [2]

    0

    z FILAMENT VOLTS = 2-0 MAX.

  • Published value [1]

    6 A

    6 FILAMENT CURRENT=-20 AMPERE

  • Published value [2]

    -20 A

    6 FILAMENT CURRENT=-20 AMPERE

  • ANODE VOLTS (EA)+ [1]

    150

    ANODE VOLTS (EA)+150 MAX. 20/-

  • ANODE VOLTS (EA)+ [2]

    20

    ANODE VOLTS (EA)+150 MAX. 20/-

  • Published value

    5 mA/V

    5% Ll X MUTUAL CONDUCTANCE-I7S MA/YOLT . . .

  • N [1]

    4

    N 4 H [XAT E120 Es6-75.£6 = - 5| S.22 is a screen grid amplifier

  • N [2]

    20

    N 4 H [XAT E120 Es6-75.£6 = - 5| S.22 is a screen grid amplifier

  • N [3]

    -75

    N 4 H [XAT E120 Es6-75.£6 = - 5| S.22 is a screen grid amplifier

  • N [4]

    6

    N 4 H [XAT E120 Es6-75.£6 = - 5| S.22 is a screen grid amplifier

  • N [5]

    5

    N 4 H [XAT E120 Es6-75.£6 = - 5| S.22 is a screen grid amplifier

  • N [6]

    22

    N 4 H [XAT E120 Es6-75.£6 = - 5| S.22 is a screen grid amplifier

  • Published value [1]

    5 pF

    5|3 1 - L low self-capacity. It isideal

  • Published value [2]

    3 pF

    5|3 1 - L low self-capacity. It isideal

  • Published value [3]

    1 pF

    5|3 1 - L low self-capacity. It isideal

  • S

    21

    S 21, Screen Grid,

  • S [1]

    21

    S.21 is a screen grid amplifier similar 40 N/ SCREEN VOLTS =Zgrggflm

  • S [2]

    40

    S.21 is a screen grid amplifier similar 40 N/ SCREEN VOLTS =Zgrggflm

  • in design to Marconi S [1]

    22 ohm

    in design to Marconi S.22, but in- ® IMPEDANCE * 200,000 DHMS

  • in design to Marconi S [2]

    200000 ohm

    in design to Marconi S.22, but in- ® IMPEDANCE * 200,000 DHMS

  • exceptionally small self-capacity en

    30 pF

    exceptionally small self-capacity en- 30/} ' =

  • current consumption is of particular g A == [1]

    1 A

    current consumption is of particular g A ==1£6= -1~

  • current consumption is of particular g A == [2]

    6 A

    current consumption is of particular g A ==1£6= -1~

  • current consumption is of particular g A == [3]

    -1 A

    current consumption is of particular g A ==1£6= -1~