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

3R187E

Heavy-filament triode for high-power electronic service. Available source material does not establish a narrower functional application confidently.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
5 V / 78 A

Description

The 3R187E is a water-cooled industrial 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
78 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

  • This valve is electrically identical to [1]

    3

    This valve is electrically identical to 3)J/187E but, for anode cooling, a helical copper tube

  • This valve is electrically identical to [2]

    187

    This valve is electrically identical to 3)J/187E but, for anode cooling, a helical copper tube

  • Filament voltage

    5 V

    Filament voltage 5 v

  • Filament current, nominal

    78 A

    Filament current, nominal 78 A

  • Mutual conductance | at Va = [1]

    2 mA/V

    Mutual conductance | at Va = 2kV; Vg = —75V 22 mA/vV

  • Mutual conductance | at Va = [2]

    -75 mA/V

    Mutual conductance | at Va = 2kV; Vg = —75V 22 mA/vV

  • Mutual conductance | at Va = [3]

    22 mA/V

    Mutual conductance | at Va = 2kV; Vg = —75V 22 mA/vV

  • Grid to anode

    29

    Grid to anode 29 - pF

  • Grid to filament

    54

    Grid to filament 54 pF

  • Anode to filament

    15

    Anode to filament 15 pF

  • 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) [1]

    55 kV

    direct voltage plus ripple) 55 6-5 kv

  • direct voltage plus ripple) [2]

    6 kV

    direct voltage plus ripple) 55 6-5 kv

  • direct voltage plus ripple) [3]

    -5 kV

    direct voltage plus ripple) 55 6-5 kv

  • 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]

    1 mA

    Maximum direct grid current (Note 1) 500 500 mA

  • Maximum direct grid current (Note [2]

    500 mA

    Maximum direct grid current (Note 1) 500 500 mA

  • Maximum direct grid current (Note [3]

    500 mA

    Maximum direct grid current (Note 1) 500 500 mA

  • Maximum negative grid bias [1]

    -1500

    Maximum negative grid bias —1500 —1500 v

  • Maximum negative grid bias [2]

    -1500

    Maximum negative grid bias —1500 —1500 v

  • Maximum frequency for the above ratings [1]

    120 MHz

    Maximum frequency for the above ratings 120 100 MHz

  • Maximum frequency for the above ratings [2]

    100 MHz

    Maximum frequency for the above ratings 120 100 MHz

  • Note

    1 W

    Note 1.—This figure is given for guidance. Grid dissipation is absolute rating.

  • Direct anode voltage [1]

    5 kV

    Direct anode voltage 5 [ 65 kv

  • Direct anode voltage [2]

    65 kV

    Direct anode voltage 5 [ 65 kv

  • Direct grid voltage [1]

    -560 V

    Direct grid voltage —560 —650 —720 A

  • Direct grid voltage [2]

    -650 V

    Direct grid voltage —560 —650 —720 A

  • Direct grid voltage [3]

    -720 V

    Direct grid voltage —560 —650 —720 A

  • 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]

    2 mA

    Direct grid current (Note 2) . 100 (140) 130 (190) 150 (200) mA

  • Direct grid current (Note [2]

    100 mA

    Direct grid current (Note 2) . 100 (140) 130 (190) 150 (200) mA

  • Direct grid current (Note [3]

    140 mA

    Direct grid current (Note 2) . 100 (140) 130 (190) 150 (200) mA

  • Direct grid current (Note [4]

    130 mA

    Direct grid current (Note 2) . 100 (140) 130 (190) 150 (200) mA

  • Direct grid current (Note [5]

    190 mA

    Direct grid current (Note 2) . 100 (140) 130 (190) 150 (200) mA

  • Direct grid current (Note [6]

    150 mA

    Direct grid current (Note 2) . 100 (140) 130 (190) 150 (200) mA

  • Direct grid current (Note [7]

    200 mA

    Direct grid current (Note 2) . 100 (140) 130 (190) 150 (200) mA

  • Grid dissipation (Note [1]

    2 W

    Grid dissipation (Note 2) 25 55 55 w

  • Grid dissipation (Note [2]

    25 W

    Grid dissipation (Note 2) 25 55 55 w

  • Grid dissipation (Note [3]

    55 W

    Grid dissipation (Note 2) 25 55 55 w

  • Grid dissipation (Note [4]

    55 W

    Grid dissipation (Note 2) 25 55 55 w

  • Grid resistor [1]

    56

    Grid resistor 56 5 4.8 kQ

  • Grid resistor [2]

    5

    Grid resistor 56 5 4.8 kQ

  • Grid resistor [3]

    4.8

    Grid resistor 56 5 4.8 kQ

  • Power input [1]

    8 kW

    Power input 8 9 117 kw

  • Power input [2]

    9 kW

    Power input 8 9 117 kw

  • Power input [3]

    117 kW

    Power input 8 9 117 kw

  • Output power (oscillator) [1]

    54 kW

    Output power (oscillator) 54 69 89 kw

  • Output power (oscillator) [2]

    69 kW

    Output power (oscillator) 54 69 89 kw

  • Output power (oscillator) [3]

    89 kW

    Output power (oscillator) 54 69 89 kw

  • 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 voltage

    6 kV

    Maximum direct anode voltage 6 kv

  • 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 [1]

    -1 V

    Maximum direct grid voltage - --1 500 v

  • Maximum direct grid voltage [2]

    500 V

    Maximum direct grid voltage - --1 500 v

  • 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)

    2 A

    Direct anode current (zero signal) 02 A

  • Direct anode current (maximum signal)

    19 mA

    Direct anode current (maximum signal) 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 A

  • Grid drive power, approximately

    85 W

    Grid drive power, approximately 85 w

  • Direct grid current

    80 mA

    Direct grid current . 80 mA

  • Direct grid dissipation

    14 W

    Direct grid dissipation 14 w

  • Output power

    12 kW

    Output power 12 kw

  • Fig

    1 V

    Fig. 1.—Anode Current and Grid Current versus Anode Voltage

  • /,;l

    1 kV

    - /,;l 1) : ANODE VOLTAGE (kV)

  • Fig

    2 A

    Fig. 2.—~Constant Current Characteristics

  • P

    2

    P 2 FILAMENT

  • Published value [1]

    2

    2 N 31 GRID

  • Published value [2]

    31

    2 N 31 GRID

  • '

    4

    ' 4 ANODE

  • NOTE:— IN HIGH FREQUENCY CIRCUITS, CONTACT

    2

    NOTE:— IN HIGH FREQUENCY CIRCUITS, CONTACT 2