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

3J187E

Industrial power triode for Class C RF-heating oscillators, with Class B audio-amplifier or modulator service also specified. Its multi-kilowatt dissipation and output capability target large industrial RF generators.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
5 V / 100 A

Description

The 3J187E 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
100 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
0.022 S
Amplification factor
12
Max plate voltage
6500 V
Max plate dissipation
4000 W
Max grid dissipation
200 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

  • Filament voltage

    5 V

    Filament voltage 5 v

  • Nominal current

    78 A

    Nominal current 78 A

  • Cold filament resistance [1]

    0 ohm

    Cold filament resistance 0-0075 Q

  • Cold filament resistance [2]

    -75 ohm

    Cold filament resistance 0-0075 Q

  • Note [1]

    1

    Note 1.—For a filament supply regulated to -5 per cent.

  • Note [2]

    -5

    Note 1.—For a filament supply regulated to -5 per cent.

  • Mutual conductance | Va = [1]

    2 mA/V

    Mutual conductance | Va = 2kV: Vg = —75V 22 mA/V

  • Mutual conductance | Va = [2]

    -75 mA/V

    Mutual conductance | Va = 2kV: Vg = —75V 22 mA/V

  • Mutual conductance | Va = [3]

    22 mA/V

    Mutual conductance | Va = 2kV: Vg = —75V 22 mA/V

  • Grid to anode

    29

    Grid to anode 29 pF

  • Grid to filament

    54

    Grid to filament 54 pF

  • Anode to filament [1]

    1

    Anode to filament 1-5 pF

  • Anode to filament [2]

    -5

    Anode to filament 1-5 pF

  • Maximum radiator core temperature [1]

    220

    Maximum radiator core temperature 220 220 “C

  • Maximum radiator core temperature [2]

    220

    Maximum radiator core temperature 220 220 “C

  • Maximum seal temperature (Note [1]

    2

    Maximum seal temperature (Note 2) 180 220 °C

  • Maximum seal temperature (Note [2]

    180

    Maximum seal temperature (Note 2) 180 220 °C

  • Maximum seal temperature (Note [3]

    220

    Maximum seal temperature (Note 2) 180 220 °C

  • Note

    2

    Note 2.—To ensure that the stem 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 fe*/min (0,28 to 1,42 m3/min) dependent upon the circuit and frequency

  • Published value [2]

    28

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

  • Published value [3]

    142

    50 fe*/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) [1]

    55 V

    direct voltage plus ripple) 55 6-5 134

  • direct voltage plus ripple) [2]

    6 V

    direct voltage plus ripple) 55 6-5 134

  • direct voltage plus ripple) [3]

    -5 V

    direct voltage plus ripple) 55 6-5 134

  • direct voltage plus ripple) [4]

    134 V

    direct voltage plus ripple) 55 6-5 134

  • Maximum direct anode current [1]

    2 mA

    Maximum direct anode current 2 2 A

  • Maximum direct anode current [2]

    2 mA

    Maximum direct anode current 2 2 A

  • Maximum direct anode dissipation (continuous) [1]

    3 kW

    Maximum direct anode dissipation (continuous) 3 3 kw

  • Maximum direct anode dissipation (continuous) [2]

    3 kW

    Maximum direct anode dissipation (continuous) 3 3 kw

  • Maximum direct grid dissipation (continuous) [1]

    200 W

    Maximum direct grid dissipation (continuous) 200 200 w

  • Maximum direct grid dissipation (continuous) [2]

    200 W

    Maximum direct grid dissipation (continuous) 200 200 w

  • Maximum direct grid current (Note [1]

    3 mA

    Maximum direct grid current (Note 3) 500 500 mA

  • Maximum direct grid current (Note [2]

    500 mA

    Maximum direct grid current (Note 3) 500 500 mA

  • Maximum direct grid current (Note [3]

    500 mA

    Maximum direct grid current (Note 3) 500 500 mA

  • Maximbm negative grid bias [1]

    -1500

    Maximbm negative grid bias —1500 —1500 \

  • Maximbm negative grid bias [2]

    -1500

    Maximbm negative grid bias —1500 —1500 \

  • Note

    3 W

    Note 3.—This figure is given for guidance. Grid dissipation is absolute rating.

  • Direct anode voltage S [1]

    6 kV

    Direct anode voltage S 6 6-5 kv

  • Direct anode voltage S [2]

    6 kV

    Direct anode voltage S 6 6-5 kv

  • Direct anode voltage S [3]

    -5 kV

    Direct anode voltage S 6 6-5 kv

  • Direct grid voltage — [1]

    560 V

    Direct grid voltage — 560 —650 -720 v

  • Direct grid voltage — [2]

    -650 V

    Direct grid voltage — 560 —650 -720 v

  • Direct grid voltage — [3]

    -720 V

    Direct grid voltage — 560 —650 -720 v

  • Direct anode current [1]

    16 A

    Direct anode current 16 15 18 A

  • Direct anode current [2]

    15 A

    Direct anode current 16 15 18 A

  • Direct anode current [3]

    18 A

    Direct anode current 16 15 18 A

  • Peak r.f. grid voltage [1]

    760 V

    Peak r.f. grid voltage 760 890 970 \

  • Peak r.f. grid voltage [2]

    890 V

    Peak r.f. grid voltage 760 890 970 \

  • Peak r.f. grid voltage [3]

    970 V

    Peak r.f. grid voltage 760 890 970 \

  • Direct grid current (Note [1]

    4 mA

    Direct grid current (Note 4) 100 (140) 130 (190) 150 (200) mA

  • Direct grid current (Note [2]

    100 mA

    Direct grid current (Note 4) 100 (140) 130 (190) 150 (200) mA

  • Direct grid current (Note [3]

    140 mA

    Direct grid current (Note 4) 100 (140) 130 (190) 150 (200) mA

  • Direct grid current (Note [4]

    130 mA

    Direct grid current (Note 4) 100 (140) 130 (190) 150 (200) mA

  • Direct grid current (Note [5]

    190 mA

    Direct grid current (Note 4) 100 (140) 130 (190) 150 (200) mA

  • Direct grid current (Note [6]

    150 mA

    Direct grid current (Note 4) 100 (140) 130 (190) 150 (200) mA

  • Direct grid current (Note [7]

    200 mA

    Direct grid current (Note 4) 100 (140) 130 (190) 150 (200) mA

  • Grid dissipation {Note [1]

    4 W

    Grid dissipation {Note 4) 25 55 55 w

  • Grid dissipation {Note [2]

    25 W

    Grid dissipation {Note 4) 25 55 55 w

  • Grid dissipation {Note [3]

    55 W

    Grid dissipation {Note 4) 25 55 55 w

  • Grid dissipation {Note [4]

    55 W

    Grid dissipation {Note 4) 25 55 55 w

  • Grid resistor [1]

    5

    Grid resistor 5-6 5 4-8 kQ

  • Grid resistor [2]

    -6

    Grid resistor 5-6 5 4-8 kQ

  • Grid resistor [3]

    5

    Grid resistor 5-6 5 4-8 kQ

  • Grid resistor [4]

    4

    Grid resistor 5-6 5 4-8 kQ

  • Grid resistor [5]

    -8

    Grid resistor 5-6 5 4-8 kQ

  • Power input , g [1]

    9 kW

    Power input , g 9 17 kW

  • Power input , g [2]

    17 kW

    Power input , g 9 17 kW

  • Qutput power (oscillator) [1]

    5 W

    Qutput power (oscillator) 5-4 69 89 1397

  • Qutput power (oscillator) [2]

    -4 W

    Qutput power (oscillator) 5-4 69 89 1397

  • Qutput power (oscillator) [3]

    69 W

    Qutput power (oscillator) 5-4 69 89 1397

  • Qutput power (oscillator) [4]

    89 W

    Qutput power (oscillator) 5-4 69 89 1397

  • Qutput power (oscillator) [5]

    1397 W

    Qutput power (oscillator) 5-4 69 89 1397

  • Power into load at

    85 W

    Power into load at 85 per cent

  • transfer efficiency [1]

    4

    transfer efficiency 4-6 58 7-5 kW

  • transfer efficiency [2]

    -6

    transfer efficiency 4-6 58 7-5 kW

  • transfer efficiency [3]

    58

    transfer efficiency 4-6 58 7-5 kW

  • transfer efficiency [4]

    7

    transfer efficiency 4-6 58 7-5 kW

  • transfer efficiency [5]

    -5

    transfer efficiency 4-6 58 7-5 kW

  • Maximum direct anode current

    2 mA

    Maximum direct anode current 2 A

  • Maximum direct anode dissipation (intermittent)

    5 kW

    Maximum direct anode dissipation (intermittent) 5 kW

  • Maximum direct anode dissipation (continuous)

    4 kW

    Maximum direct anode dissipation (continuous) 4 kW

  • Maximum direct grid dissipation (continuous)

    200 W

    Maximum direct grid dissipation (continuous) 200 w

  • Maximum direct grid voltage

    -1500 V

    Maximum direct grid voltage —1500 A

  • Direct anode voltage

    5 kV

    Direct anode voltage 5 kv

  • Direct grid voltage —~

    350 V

    Direct grid voltage —~350 v

  • Direct anode current (zero signal) per valve

    2 A

    Direct anode current (zero signal) per valve 02 A

  • Direct anode current (maximum signal) per valve

    19 mA

    Direct anode current (maximum signal) per valve . 19 A

  • Load resistor, anode to anode

    27

    Load resistor, anode to anode 27 kQ

  • Peak a.f. grid to grid voltage

    1040 V

    Peak a.f. grid to grid voltage 1040 v

  • Grid drive power, approximately ( [1]

    2 W

    Grid drive power, approximately (2 valves) 85 w

  • Grid drive power, approximately ( [2]

    85 W

    Grid drive power, approximately (2 valves) 85 w

  • Direct grid current, per valve

    80 mA

    Direct grid current, per valve 80 mA