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5UP31

Five-inch P31 cathode-ray instrument tube for oscillographic and measurement display, with manufacturer-specified electrostatic focusing, deflection, and beam-control characteristics.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: 12E
Socket code: DUODECAL11
Base pins: 12
Nominal heater: 6.3 V / 600 mA

Description

5UP31 is a oscillograph tube using electrostatic focusing and electrostatic deflection. The source specifies a P7 screen and publishes CRT accelerating-electrode ratings, control/focus electrode limits, heater-cathode limits, capacitances, and operating or deflection characteristics. The datasheet explicitly states that its electrical characteristics are the same as 5UP1, with the listed differences applying primarily to the screen/optical or mechanical configuration.

Socket description

Duodecal 11-contact CRT base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 12E
Socket code: DUODECAL11
Base pins: 12
Nominal heater voltage: 6.3 V
Nominal heater current: 600 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

12E - 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: 2500 V

CRT maximum accelerating/anode/ultor voltage is promoted to MaxPlateVoltage; additional electrode ratings, capacitances, operating conditions, deflection/focus and optical data are preserved as parameters.

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

1971 RCA HB3 Binder 1 of 7

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

Maximum anode 1 voltage
1000 V
Maximum grid 1 negative-bias voltage
200 V
NegativeBias
Maximum grid 1 positive-bias voltage
0 V
PositiveBias
Maximum grid 1 positive-peak voltage
2 V
PositivePeak
Maximum peak voltage between anode 2 and any deflecting electrode
500 V
Peak heater-cathode voltage
125 V
HeaterNegative
Peak heater-cathode voltage
125 V
HeaterPositive
Maximum accelerating/anode voltage
2500 V
ANOGE-No.2 • VOLTAGE
2500 V
Maximum
ANODE-No.l VOLTAGE
1000 V
Maximum
AND ANY DEFLECTING ELECTRODE
500 V
Maximum
Anode-tio.l Voltage 170 - 32D 340
640 V
Grid-No.l-Circuit Resistance
1.5 MΩ
Maximum
Phosphor persistence to 10 percent brightness
38 us
Approximate

Capacitance

Grid 1 to all other electrodes capacitance
8 pF
Approximate

Characteristic

Current
600 mA
Grid No.l to All Other Electrodes
8 pF
DJ1 to All Other Electrodes
11 pF
DJ2 to All Other Electrodes
8 pF
DJ3 to All Other Electrodes. ._
7 pF
DJ4 to All Other. Electrodes
8 pF