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Specialized - Switching Tube ·Triode

7691

Large forced-air-cooled hard-tube pulse-modulator triode for major radar and pulsed-power systems. Tens-of-kilovolts plate capability and very high pulse current make it a specialized high-energy switching tube.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
13 V / -

Description

Westinghouse 7691 September 15, 1960 HARD TUBE PULSE MODULATOR TYPE 7691 The 7691 is a large three-elecirode, forced air cooled tube designed for pulse applications as a hard-tube modu- lator. The anode is capable of dissipating 10 kilowatts, exclusive of filament heating power. The cathode is a multiple-strand, thoriated-tungsten filoment which may be operated either single phase or 3 phase. ELECTRICAL LONG PULSE OPERATION Cathods. . . .. ... Multiple-Strand, Thoriated-Tungsten Filament MAXIMUM RATINGS: Filament: Absolute Maximum Valves Voltage: DC Plate Voltage. . . . . . ........ 60 max. Kilovolts Single Phase Conmection, . . . . ......... 12 Yolts DC Grid Voltags « v v ov v .. _3500 max. Volts 3 Phose Connection {to neutral) ... ... ... 12 Volts Peak Pasifive Grid Voltage . « . . - . . . 2500 max Volts C“‘:m"“ ) Peak Pulse Plate Current . ... ..... 150 max., Amperes Single Phase Connection., . . ... ........ 309 Amperes Peak Pulse Grid Current . . o« v .. .. SO max. Amperes 3 Phase

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
13 V
Nominal heater current
-
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
Max plate dissipation
10000 W
Max cathode current
200 A

Source-derived physical/electrical section.

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

1947 Westinghouse

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • lator. The anode is capable of dissipating

    10

    lator. The anode is capable of dissipating 10 kilowatts, exclusive of filament heating power. The cathode is a

  • Voltage: DC Plate Voltage

    60

    Voltage: DC Plate Voltage. . . . . . ........ 60 max. Kilovolts

  • Single Phase Conmection,

    3500

    Single Phase Conmection, . . . . ......... 12 Yolts DC Grid Voltags « v v ov v .. _3500 max. Volts

  • 3 Phose Connection {to neutral) ... ... ... 12 Volts Peak Pa

    2500

    3 Phose Connection {to neutral) ... ... ... 12 Volts Peak Pasifive Grid Voltage . « . . - . . . 2500 max Volts

  • C“‘:m"“ ) Peak Pulse Plate Current

    150

    C“‘:m"“ ) Peak Pulse Plate Current . ... ..... 150 max., Amperes

  • Single Phase Connection.,

    309

    Single Phase Connection., . . ... ........ 309 Amperes Peak Pulse Grid Current . . o« v .. .. SO max. Amperes

  • 3 Phase Connection (per phase} ... ... .. - 103 Amperes Plat

    10

    3 Phase Connection (per phase} ... ... .. - 103 Amperes Plate Dissipation. . . . . Ve e 10 mox. Kilowatts

  • Minimum Filament Heating Time

    1

    Minimum Filament Heating Time . .. ... .. ... 15 Seconds Grid Dissipation . . ... .. oo, 1.0 moax. Kilowatt

  • Gridto Plate. . .. ... .ovu i

    200

    Gridto Plate. . .. ... .ovu i 42 ppt Peak Pulse Cathode Current. . . .. ... 200 mox. Amperes

  • e e e

    8

    .. e e e 8 upf SHORT PULSE OPERATION

  • Ng" W{eighv; D

    60

    Ng" W{eighv; D 80 Pounds DC Plate Voltage. . . ., .. v o ov 60 max. Kilovolts

  • SH'p‘?'"g eight. ..o «

    3500

    SH'p‘?'"g eight. ..o « - - 125 Pounds DC Grid Voltage . . ............. 3500 mox. Volts

  • Cooling: £ I Peck Pasitive Grid Voltage

    3500

    Cooling: £ I Peck Pasitive Grid Voltage . . . .. ... 3500 max. Yolts

  • Mefljod. A AR T """""""" oreed Air O:W Peak Pulse Plate Current {Note

    400

    Mefljod. A AR T """""""" oreed Air O:W Peak Pulse Plate Current {Note 1}. . . . 400 max. Amperes

  • Mox:mum mbient Air Iemperature

    100

    Mox:mum mbient Air Iemperature ................ 5 °C Peak Pulse Grid Current (Note 1) . . . . 100 max. Amperes

  • Muxnr:wm B:"Ib and Sea Temper?mre """ s

    500

    Muxnr:wm B:"Ib and Sea Temper?mre """ s 180 °C Peak Pulse Cathode Current (Note 1). . 500 mox. Amperes

  • Roquirad Air Flaw Through Radiator: Plote Dissipation. . . ..,

    10

    Roquirad Air Flaw Through Radiator: Plote Dissipation. . . .., .0 b iu o .. 10 mox. Kilowatts

  • Plate Dissipation

    1

    Plate Dissipation ... ......... 10 8 5 Kilowatts Grid Dissipation 1.0 max Kilowartt

  • AirFlow . ... .. i

    0.5

    AirFlow . ... .. i 800 700 500 CFM Pulse Langth - . « v vveeone e, 0.5 mox. pseconds

  • ~ Single Phase - .. vvvrvrivnnenen,

    13

    ~ Single Phase - .. vvvrvrivnnenen,. 13 Volts

  • Three Phase (toneuvtral). . . ... ... ...,

    13

    Three Phase (toneuvtral). . . ... ... ..., 13 Volts

  • SinglePhase

    318

    SinglePhase . .. ................. 318 Amperes

  • E.ia'i?oégg'o:ooor | Three Phase (perphase). . . .o oo v o oW

    106

    E.ia'i?oégg'o:ooor | Three Phase (perphase). . . .o oo v o oW 106 Amperes

  • I%‘ a MIN. STRAIGHT at voltages in excess of

    16

    I%‘ a MIN. STRAIGHT at voltages in excess of 16 KV. Therefore equipmant design

  • (

    0.5

    (0.5 Microsecond Pulse Service}

  • Filament Volts

    13

    Filament Volts 13.0

  • Filameni Amperes =

    318

    Filameni Amperes = 318

  • Plate Kilovolt

    5

    Plate Kilovolt 5

  • (

    0.5

    (0.5 Microsecond Pulse Service)

  • Filoment Amperes=

    3

    Filoment Amperes=3I8

Characteristic

  • Amplification Factor . .. ..ol

    1000

    Amplification Factor . .. ..ol 2 PulseLength . ................ 1000 moax. pseconds