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Specialized - Cathode Ray ·CathodeRay

5ABP7

Five-inch direct-view oscilloscope CRT with electrostatic focusing and deflection, post-deflection acceleration, and a P7 screen providing persistent trace visibility for slower or transient displays.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
B14A
Base pins
-
Nominal heater
6.3 V / 600 mA

Description

The Sylvania 5ABP7 is a 5-inch direct-view oscilloscope CRT with electrostatic focus and deflection, post-deflection acceleration, and a blue screen.

Socket description

Large readout/Nixie 14-contact base, 44.5 mm pin circle

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B14A
Base pins
-
Nominal heater voltage
6.3 V
Nominal heater current
600 mA
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

Cathode Ray

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

CRT electron-gun/display 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

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

  • Heater Voltage

    6.3 V

  • Heater Current

    600 mA

  • Focusing Method

    Electrostatic text

  • Deflection Method

    Electrostatic text

  • Fluorescence

    Blue text

  • Persistence

    Long text

  • Cathode-to-All Capacitance

    5 pF

    Nominal

  • Grid1-to-All Capacitance

    8 pF

    Nominal

  • Deflection Plates 1-2 Capacitance

    2.5 pF

    Nominal

  • Deflection Plates 3-4 Capacitance

    4.3 pF

    Nominal

  • Phosphorescence

    Yellow text

Other

  • Maximum Anode3 Voltage

    6600 V

  • Maximum Anode2 Voltage

    2860 V

  • Maximum Anode1 Voltage

    1100 V

  • Maximum Grid1 Negative Bias

    220 V

  • Maximum Grid1 Positive Peak

    2 V

  • Maximum Heater-Cathode Voltage

    140 V

    EitherPolarity

  • Maximum Anode2-to-Deflection-Plate Voltage

    550 V

  • Typical Anode3 Voltage

    3000 V

  • Typical Anode2 Voltage

    1500 V

  • Focus Voltage Minimum

    300 V

    Anode1

  • Focus Voltage Maximum

    515 V

    Anode1

  • Grid1 Cutoff Voltage Minimum

    -65 V

  • Grid1 Cutoff Voltage Maximum

    -39 V

  • Deflection Factor Plates 1-2 Minimum

    40 V/in

  • Deflection Factor Plates 1-2 Maximum

    54 V/in

  • Deflection Factor Plates 3-4 Minimum

    27 V/in

  • Deflection Factor Plates 3-4 Maximum

    36 V/in

  • Maximum Grid1 Circuit Resistance

    1.5 Mohm

  • Maximum Deflection Circuit Resistance

    5 Mohm