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632PM

Six-inch voltage-transient oscillograph CRT with electrostatic deflection, magnetic focusing, and a screen intended for photographic recording. Ferranti specifies approximately 25 kV anode capability for transient capture.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: InternationalOctal
Socket code: IO
Base pins: 8
Nominal heater: 4 V / 1 A

Description

Six-inch voltage-transient oscillograph cathode-ray tube with electrostatic deflection, magnetic focus, and photographic-recording screen.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: InternationalOctal
Socket code: IO
Base pins: 8
Nominal heater voltage: 4 V
Nominal heater current: 1 A
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

InternationalOctal - 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

Cathode Ray

X-ray radiationInterelectrode capacitances

Max plate voltage: 25000 V

Ratings, characteristics, typical operating points, and capacitances were extracted from the supplied Ferranti datasheet.

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

1963 Ferranti

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristic

HeaterOrFilamentVoltage
4 V
HeaterOrFilamentCurrent
1 A
FocusingMethod
Magnetic
DeflectionMethod
Electrostatic
ScreenConstruction
Metal-backed
UsefulScreenDiameterMinimum
127 mm
GridVoltageForVisualCutoff
AnodeVoltage/120
YDeflectionSensitivity
450/AnodeVoltage mm/V
XDeflectionSensitivity
500/AnodeVoltage mm/V

Other

HeaterCathodeVoltageMaximum
100 V
PulsedBeamCurrentMaximum
500 uA
GridVoltageForVisualCutoff
-165 V
FocusCoil
900 ampere-turn
WritingSpeedMinimum
500000 spot-diameters/us
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