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Specialized - Cathode Ray ·CathodeRay

5BP1A

Five-inch electrostatic oscilloscope and instrument cathode-ray tube designed for direct waveform display. Manufacturer documentation specifies the electron-optical system, screen characteristics, ratings, capacitances, and representative operating conditions.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
11N
Socket code
B11A
Base pins
11
Nominal heater
6.3 V / 600 mA

Description

General-purpose 5-inch electrostatic-focus and electrostatic-deflection cathode-ray tube for oscillographic display.

Socket description

Magnal 11-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
11N
Socket code
B11A
Base pins
11
Nominal heater voltage
6.3 V
Nominal heater current
600 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

11N - 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
2200 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

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Heater Voltage

    6.3 V

    Nominal

  • Heater Current

    600 mA

    Nominal

Data set 02

1960 Du Mont

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

  • Focusing method

    1 code

    Electrostatic

  • Deflection method

    1 code

    Electrostatic

  • Deflection factor D1-D2

    -

    Published range 70 to 98 V/in

  • Deflection factor D3-D4

    -

    Published range 63 to 89 V/in

Other

  • Accelerator voltage maximum

    2000 V

  • Accelerator voltage

    2000 V

  • Grid No. 1 voltage

    -

    Published range -60 to -20 V

  • Grid No. 1 negative bias maximum

    125 V

Capacitance

  • Grid No. 1 to all other electrodes

    8 pF

    Approximate or first published bound

Data set 03

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Capacitance

  • Grid No. 1 to all other electrodes capacitance

    8 pF

  • Deflection plates 1-2 capacitance

    1.3 pF

  • Deflection plates 3-4 capacitance

    1.2 pF

  • Deflection plate 1 to all other electrodes capacitance

    9.5 pF

  • Deflection plate 3 to all other electrodes capacitance

    12 pF

  • Deflection plate 1 to all other electrodes except D2 capacitance

    8 pF

  • Deflection plate 2 to all other electrodes except D1 capacitance

    7.5 pF

  • Deflection plate 3 to all other electrodes except D4 capacitance

    10 pF

  • Deflection plate 4 to all other electrodes except D3 capacitance

    7.5 pF

Other

  • Maximum anode No. 2 voltage

    2200 V

  • Maximum anode No. 1 voltage

    1100 V

  • Maximum negative grid bias magnitude

    125 V

  • Peak voltage between anode No. 2 and any deflection plate

    550 V

  • Typical anode No. 2 voltage

    2000 V

  • Focus voltage range

    315 to 562 V

  • Grid cutoff voltage range

    -60 to -20 V

  • Deflection factor plates 1-2

    70 to 98 V/in

  • Deflection factor plates 3-4

    63 to 89 V/in

CircuitValue

  • Grid No. 1 circuit resistance maximum

    1.5 MOhm

  • Deflection circuit resistance maximum

    5 MOhm

Data set 04

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

    1100 V

  • Maximum grid 1 negative voltage

    125 V

    NegativeBias

  • Maximum grid 1 positive voltage

    0 V

    PositiveBias

  • Maximum peak voltage between anode 2 and any deflecting electrode

    550 V

  • Typical anode 2 and grid 2 voltage low

    1500 V

    TypicalOperationLow

  • Typical anode 2 and grid 2 voltage high

    2000 V

    TypicalOperationHigh

  • Typical anode 1 focus voltage low

    337 V

    TypicalOperationLow

  • Typical anode 1 focus voltage high

    450 V

    TypicalOperationHigh

  • Grid 1 visual cutoff voltage low

    -30 V

    TypicalOperationLow

  • Grid 1 visual cutoff voltage high

    -40 V

    TypicalOperationHigh

  • Maximum accelerating/anode voltage

    2200 V

  • ANODE-No.2 d GRID-No;2 VOLTAGE

    2200 V

    Maximum

  • ANODE-No.l VOLTAGE

    1100 V

    Maximum

  • ANY DEFLECTING ELECTRODE

    550 V

    Maximum

  • Anode-No.2 & Grid-No.2 Voltage' 1500

    2000 V

  • Grid-No.l- Circuit Resistance 1

    5 MΩ

    Maximum

  • Electrode Circuit•

    5 MΩ

    Maximum

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

    9.5 pF

  • DJ3 to Atl Other Electrodes

    12 pF

  • UJ1 to All Other Electrodes except DJ2

    8 pF

  • DJ2 to All Other Electrodes except DJ1

    7.5 pF

  • DJ3 to All Other Electrodes except DJ4

    10 pF

  • DJq to All Other Electrodes except DJ3

    7.5 pF