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Power - Triode (over 1000V 100W) ·Triode

3J222E

Very high-power industrial triode specifically designed for RF-heating oscillator service. Rated for 10 kW plate dissipation, with published Class C oscillator conditions producing approximately 26 kW RF output.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
8 V / 125 A

Description

The 3J222E is an industrial triode specifically designed for high-power industrial RF heating oscillator service.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
-
Nominal heater voltage
8 V
Nominal heater current
125 A
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

Triode

X-ray radiationInterelectrode capacitances
Transconductance
0.06 S
Amplification factor
16
Max plate voltage
7000 V
Max plate dissipation
10000 W
Max grid dissipation
500 W

Published maximum ratings and characteristics audited; remaining values retained densely 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

1962 ITT

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Published value

    100 MHz

    100 Mc/s. Design features give a high mutual conductance, resulting

  • Filament voltage [1]

    8 V

    Filament voltage 8 + 29 8 4 59, v

  • Filament voltage [2]

    29 V

    Filament voltage 8 + 29 8 4 59, v

  • Filament voltage [3]

    8 V

    Filament voltage 8 + 29 8 4 59, v

  • Filament voltage [4]

    4 V

    Filament voltage 8 + 29 8 4 59, v

  • Filament voltage [5]

    59 V

    Filament voltage 8 + 29 8 4 59, v

  • Filament current {nominal)

    125 A

    Filament current {nominal) 125 A

  • Filament cold resistance (nominal)

    0.0085 ohm

    Filament cold resistance (nominal) 0.0085 Q

  • Mutual conductance } at Va, [1]

    2 mA/V

    Mutual conductance } at Va, 2kV, V; —87V 60 mA/vV

  • Mutual conductance } at Va, [2]

    -87 mA/V

    Mutual conductance } at Va, 2kV, V; —87V 60 mA/vV

  • Mutual conductance } at Va, [3]

    60 mA/V

    Mutual conductance } at Va, 2kV, V; —87V 60 mA/vV

  • Grid to anode

    50

    Grid to anode 50 pF

  • Grid to filament

    80

    Grid to filament 80 pF

  • Anode to filament

    3

    Anode to filament 3 pF

  • Maximum radiator core temperature

    220

    Maximum radiator core temperature 220 °C

  • Maximum seal temperature

    180

    Maximum seal temperature 180 . °C

  • Published value [1]

    214

    214-LVA-001A Filament connector, smaller

  • Published value [2]

    1

    214-LVA-001A Filament connector, smaller

  • Published value [1]

    214

    214-LVA-001B Filament connector, larger

  • Published value [2]

    1

    214-LVA-001B Filament connector, larger

  • Published value [1]

    214

    214-LVA-001C Grid connector

  • Published value [2]

    1

    214-LVA-001C Grid connector

  • direct voltage plus ripple)

    7 V

    direct voltage plus ripple) 7 kY

  • Maximum direct anode current

    6 mA

    Maximum direct anode current 6 A

  • Maximum direct anode dissipation (continuous)

    10 kW

    Maximum direct anode dissipation (continuous) 10 kw

  • Maximum direct grid dissipation (continuous)

    500 W

    Maximum direct grid dissipation (continuous) 500 w

  • Maximum direct grid current (Note [1]

    2 mA

    Maximum direct grid current (Note 2) 1-4 A

  • Maximum direct grid current (Note [2]

    1 mA

    Maximum direct grid current (Note 2) 1-4 A

  • Maximum direct grid current (Note [3]

    -4 mA

    Maximum direct grid current (Note 2) 1-4 A

  • Maximum negative grid bias [1]

    -1

    Maximum negative grid bias —1 500 v

  • Maximum negative grid bias [2]

    500

    Maximum negative grid bias —1 500 v

  • Note

    2 W

    Note 2.—This figure is given for guidance. Grid dissipation is absolute rating.

  • Direct anode voltage

    3 kV

    Direct anode voltage 3 kV

  • Direct grid voltage

    -660 V

    Direct grid voltage —660 v

  • Direct anode current [1]

    5 A

    Direct anode current 5-6 A

  • Direct anode current [2]

    -6 A

    Direct anode current 5-6 A

  • Peak r.f. grid voltage [1]

    930 V

    Peak r.f. grid voltage 930 \2

  • Peak r.f. grid voltage [2]

    2 V

    Peak r.f. grid voltage 930 \2

  • Direct grid current (Note [1]

    3 mA

    Direct grid current (Note 3) 750 (1200) mA

  • Direct grid current (Note [2]

    750 mA

    Direct grid current (Note 3) 750 (1200) mA

  • Direct grid current (Note [3]

    1200 mA

    Direct grid current (Note 3) 750 (1200) mA

  • Grid dissipation (Note [1]

    3 W

    Grid dissipation (Note 3) 260 2%

  • Grid dissipation (Note [2]

    260 W

    Grid dissipation (Note 3) 260 2%

  • Grid dissipation (Note [3]

    2 W

    Grid dissipation (Note 3) 260 2%

  • Grid resistor

    900

    Grid resistor 900 Q

  • Power input [1]

    33 kW

    Power input 33-6 kW

  • Power input [2]

    -6 kW

    Power input 33-6 kW

  • Output power (oscillator)

    26 kW

    Output power (oscillator) 26 kw

  • Power into load at [1]

    859 kW

    Power into load at 859, transfer efficiency 21 kW

  • Power into load at [2]

    21 kW

    Power into load at 859, transfer efficiency 21 kW

  • yd

    1607 kV

    yd 1607 ANODE VOLTAGE (kV)

  • Fig

    2 V

    Fig. 2.—Grid Voltage versus Anode Voltage

  • A

    2

    A 2. FILAMENT

  • Published value

    5

    5. GRID

  • i

    4

    i 4 ANODE