7750

Westinghouse hard-tube pulse-modulator triode designed for high-voltage pulsed power service. Its ratings and operating information emphasize pulse switching and modulation rather than continuous RF amplification.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 8 V / 180 A

Description

Westinghouse November 15, 1949 HARD TUBE PULSE MODULATOR TYPE 7750 The 7750 is a three-electrode tube designed for service as a hard tube modulator, The forced-air cooled anode is capable of dissipating 8 kilowatts. The cathode is a thoriated tungsten filament which moy be operated with either d-c or single-phase a-c. ELECTRICAL: MAXIMUM RATINGS: Cathode. . ... ......v ... Thoriated Tungsten Filament Absolute Moximum Valuves Filameni: DC Plate Voltage. . . . . ... oo v vn s 30 max. Kilovolts Voltage {(d-c or single phosea-c}) .......... 8 Volts DC Grid Voltoge . .. .......,.... —-2500 mox. Volrs CUITENE v v v et e e e e e s e e e e 180 Amperes Peak Positive Grid Voltoge . .. . ... 2000 max, Yol1s Heating Time {minimuem) . .. ... .......... 15 Seconds Peak Pulse Plate Current .. ... ... B0 mox, Ampares Amplification Factor. . . . .. .. ... . .., .. 20 Peak Pulse Grid Current . . .. ., ... 20 max, Amperes Plate Dissipotion ............. 8 mox. Kilowatts Grid Dissipation . . ... oo v v 80

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: 180 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

Amplification factor: 20
Max plate voltage: 30000 V
Max plate dissipation: 8000 W
Max cathode current: 100 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

capable of dissipating
8
capable of dissipating 8 kilowatts. The cathode is a thoriated tungsten filament which moy be operated with
Filameni: DC Plate Voltage. . . . . ... oo v vn s
30
Filameni: DC Plate Voltage. . . . . ... oo v vn s 30 max. Kilovolts
Voltage {(d-c or single phosea-c})
-2500
Voltage {(d-c or single phosea-c}) .......... 8 Volts DC Grid Voltoge . .. .......,.... —-2500 mox. Volrs
CUITENE v v v et e e e e e s e e e e
180
CUITENE v v v et e e e e e s e e e e 180 Amperes Peak Positive Grid Voltoge . ..
Heating Time {minimuem)
15
Heating Time {minimuem) . .. ... .......... 15 Seconds Peak Pulse Plate Current .. ... ... B0 mox, Ampares
Amplification Factor. . . . .. .. ... . ..,
20
Amplification Factor. . . . .. .. ... . .., .. 20 Peak Pulse Grid Current . . .. ., ... 20 max, Amperes
Plate Dissipotion
8
Plate Dissipotion ............. 8 mox. Kilowatts
PulseLength
1000
PulseLength . . ... ........... 1000 mox. Microseconds
MECHANICAL : Peak Putse Cathode Current
100
MECHANICAL : Peak Putse Cathode Current . ... .. 100* max. Amperas
Mounting Position . ... ... ......... Vertical, Anode Down * Peuk pulse cathode gurrent of
200
Mounting Position . ... ... ......... Vertical, Anode Down * Peuk pulse cathode gurrent of 200 amperes is allowable on
Required Air Flow Through Radiator: to
10
Required Air Flow Through Radiator: to 10.0 volts.
Plate Dissipation . . ... .. v on
8
Plate Dissipation . . ... .. v on 6 8 Kilowatts
Static Back Pressure
1
Static Back Pressure . . . ... .. ... ... 0.6 1O in. Hzo
Maximum Bulb Temperoture . . . .. ... ...y,
180
Maximum Bulb Temperoture . . . .. ... ...y, 180°C
with Plote Amp s {
0
with Plote Amp s {80- -~ .e0 10,0 Volis
With Plate Amps )
80
With Plate Amps ) 80--
tg = BO
0
tg = BO -0 r- IBQ Amperes
210 Amperes
210
210 Amperes