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

3J202E

High-power industrial triode for Class C RF-heating oscillator service, also specified for Class B audio amplification or modulation. Its 6 kW plate-dissipation rating supports oscillator output in the multi-kilowatt range.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
5 V / 112 A

Description

The 3J202E is an industrial power triode for class-C RF heating oscillators and class-B audio-frequency power-amplifier or modulator 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
5 V
Nominal heater current
112 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
0.032 S
Amplification factor
16
Max plate voltage
7000 V
Max plate dissipation
6000 W
Max grid dissipation
280 W
Max cathode current
3 A

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

  • Filament voltage [1]

    5429 V

    Filament voltage 5429, 5+ 5% v

  • Filament voltage [2]

    5 V

    Filament voltage 5429, 5+ 5% v

  • Filament voltage [3]

    5 V

    Filament voltage 5429, 5+ 5% v

  • Filament current (nominal)

    112 A

    Filament current (nominal) 112 A

  • Filament cold resistance

    0.007 ohm

    Filament cold resistance 0.007 Q

  • Mutual conductance | at V, [1]

    2 mA/V

    Mutual conductance | at V, 2kV, Vg —75V 32 mA/vV

  • Mutual conductance | at V, [2]

    -75 mA/V

    Mutual conductance | at V, 2kV, Vg —75V 32 mA/vV

  • Mutual conductance | at V, [3]

    32 mA/V

    Mutual conductance | at V, 2kV, Vg —75V 32 mA/vV

  • Grid to anode

    30

    Grid to anode 30 pF

  • Grid to filament

    60

    Grid to filament 60 ’ pF

  • Anode to filament

    1.5

    Anode to filament 1.5 pF

  • Maximum radiator core temperature

    220

    Maximum radiator core temperature 220 °C

  • Maximum seal temperature (Note [1]

    1

    Maximum seal temperature (Note 1) 180 °C

  • Maximum seal temperature (Note [2]

    180

    Maximum seal temperature (Note 1) 180 °C

  • Note

    1

    Note 1.—To ensure that the stera seals are kept below the stated temperatures, it is

  • necessary to direct into the grid flange a flow of cooling air of the order of

    10

    necessary to direct into the grid flange a flow of cooling air of the order of 10 to

  • Published value [1]

    50

    50 ft3/min (0,28 to 1,42 m3/min) dependent upon the circuit and frequency

  • Published value [2]

    28

    50 ft3/min (0,28 to 1,42 m3/min) dependent upon the circuit and frequency

  • Published value [3]

    142

    50 ft3/min (0,28 to 1,42 m3/min) dependent upon the circuit and frequency

  • 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-LYA-001C Grid connector -

  • Published value [2]

    1

    214-LYA-001C Grid connector -

  • direct voltage plus ripple)

    7 kV

    direct voltage plus ripple) 7 kv

  • Maximum direct anode current

    3 mA

    Maximum direct anode current 3 A

  • Maximum direct anode dissipation (continuous)

    6 kW

    Maximum direct anode dissipation (continuous) 6 kW

  • Maximum direct grid dissipation (continuous)

    280 W

    Maximum direct grid dissipation (continuous) 280 w

  • Maximum direct grid current (Note [1]

    2 mA

    Maximum direct grid current (Note 2) 700 mA

  • Maximum direct grid current (Note [2]

    700 mA

    Maximum direct grid current (Note 2) 700 mA

  • Maximum negative grid bias [1]

    -1

    Maximum negative grid bias —1 500 \

  • Maximum negative grid bias [2]

    500

    Maximum negative grid bias —1 500 \

  • Note

    2 W

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

  • Direct anode voltage [1]

    6 kV

    Direct anode voltage 6 6-5 kv

  • Direct anode voltage [2]

    6 kV

    Direct anode voltage 6 6-5 kv

  • Direct anode voltage [3]

    -5 kV

    Direct anode voltage 6 6-5 kv

  • Direct grid voltagz [1]

    -670

    Direct grid voltagz —670 —-770 \

  • Direct grid voltagz [2]

    -770

    Direct grid voltagz —670 —-770 \

  • Direct anode current [1]

    2 A

    Direct anode current 2:5 3 A

  • Direct anode current [2]

    5 A

    Direct anode current 2:5 3 A

  • Direct anode current [3]

    3 A

    Direct anode current 2:5 3 A

  • Peak r.f. grid voltage [1]

    950 V

    Peak r.f. grid voltage 950 1050 v

  • Peak r.f. grid voltage [2]

    1050 V

    Peak r.f. grid voltage 950 1050 v

  • Direct grid current (INote [1]

    3 mA

    Direct grid current (INote 3) 450 (650) 350 (500) mA

  • Direct grid current (INote [2]

    450 mA

    Direct grid current (INote 3) 450 (650) 350 (500) mA

  • Direct grid current (INote [3]

    650 mA

    Direct grid current (INote 3) 450 (650) 350 (500) mA

  • Direct grid current (INote [4]

    350 mA

    Direct grid current (INote 3) 450 (650) 350 (500) mA

  • Direct grid current (INote [5]

    500 mA

    Direct grid current (INote 3) 450 (650) 350 (500) mA

  • Grid dissipation (Note [1]

    3 W

    Grid dissipation (Note 3) 140 115 w

  • Grid dissipation (Note [2]

    140 W

    Grid dissipation (Note 3) 140 115 w

  • Grid dissipation (Note [3]

    115 W

    Grid dissipation (Note 3) 140 115 w

  • Grid resistor [1]

    1

    Grid resistor 1-5 22 k2

  • Grid resistor [2]

    -5

    Grid resistor 1-5 22 k2

  • Grid resistor [3]

    22

    Grid resistor 1-5 22 k2

  • Power input [1]

    15 kW

    Power input 15 19-5 kwW

  • Power input [2]

    19 kW

    Power input 15 19-5 kwW

  • Power input [3]

    -5 kW

    Power input 15 19-5 kwW

  • Output power (oscillator) [1]

    11.5 kW

    Output power (oscillator) 11.5 141 kw

  • Output power (oscillator) [2]

    141 kW

    Output power (oscillator) 11.5 141 kw

  • Power into load at [1]

    85 kW

    Power into load at 85%, transfer efficiency 10 12 kW

  • Power into load at [2]

    10 kW

    Power into load at 85%, transfer efficiency 10 12 kW

  • Power into load at [3]

    12 kW

    Power into load at 85%, transfer efficiency 10 12 kW

  • Maximum direct anode voltage

    7 kV

    Maximum direct anode voltage 7 kv

  • Maximum direct anode dissipation (intermittent)

    7 kW

    Maximum direct anode dissipation (intermittent) 7 kW

  • Maximum direct anode dissipation (continuous)

    6 kW

    Maximum direct anode dissipation (continuous) 6 kw

  • Maximum direct grid voltage [1]

    -1 kV

    Maximum direct grid voltage —1:5 kv

  • Maximum direct grid voltage [2]

    5 kV

    Maximum direct grid voltage —1:5 kv

  • Direct anode voltage

    5 kV

    Direct anode voltage 5 kv

  • Direct grid voltage —~

    350 V

    Direct grid voltage —~350 \

  • Direct anode current (zero signal), per valve

    5 A

    Direct anode current (zero signal), per valve 05 A

  • Direct anode current (maximum signal), per valve [1]

    1 mA

    Direct anode current (maximum signal), per valve 1-9 A

  • Direct anode current (maximum signal), per valve [2]

    -9 mA

    Direct anode current (maximum signal), per valve 1-9 A

  • Load resistor, anode-to-anode

    2.7

    Load resistor, anode-to-anode 2.7 kQ

  • Peak a.f. grid to grid voltage

    920 V

    Peak a.f. grid to grid voltage 920 v

  • Grid drive power, approximately ( [1]

    2 W

    Grid drive power, approximately (2 valves) 75 w

  • Grid drive power, approximately ( [2]

    75 W

    Grid drive power, approximately (2 valves) 75 w

  • Direct grid current, per valve

    84 mA

    Direct grid current, per valve 84 mA

  • Direct grid dissipation, per valve [1]

    7 W

    Direct grid dissipation, per valve 7-6 w

  • Direct grid dissipation, per valve [2]

    -6 W

    Direct grid dissipation, per valve 7-6 w

  • Output power ( [1]

    2 kW

    Output power (2 valves) 12 kW

  • Output power ( [2]

    12 kW

    Output power (2 valves) 12 kW

  • A

    2

    A 2 FILAMENT

  • Published value

    3

    3 GRID

  • *

    4

    * 4 ANODE