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Specialized - Cathode Ray ·CathodeRay

4VP11

Three-and-a-half-inch square direct-view instrument CRT with electrostatic focusing and deflection, post-deflection acceleration, and a blue P11 display. Its construction suits compact oscilloscope and measurement applications.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
B12A
Base pins
-
Nominal heater
6.3 V / 600 mA

Description

The Sylvania 4VP11 is a 3.5-inch square direct-view CRT with electrostatic focus and deflection, post-deflection acceleration, and a blue display.

Socket description

Duodecal 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B12A
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

  • Focusing method

    1 code

    Electrostatic

  • Deflection method

    1 code

    Electrostatic

  • Deflection factors

    1 code

    Published on source sheet; OCR did not preserve numeric columns reliably

  • Useful screen / scan

    1 code

    approximately 3.5-inch square direct-view screen

  • Phosphor designation

    1 code

    P11

  • Light output P1

    25 ft-lambert

    AtIb3=25uA

Other

  • Anode No. 2 / accelerator voltage maximum

    2750 V

  • Post-accelerator / Anode No. 3 voltage maximum

    5500 V

  • Anode No. 2 / accelerator voltage

    2000 V

  • Post-accelerator / Anode No. 3 voltage

    4000 V

  • Focusing electrode voltage maximum

    1100 V

  • Focusing electrode voltage minimum

    200 V

  • Focusing electrode voltage maximum

    500 V

  • Grid No. 1 cutoff voltage minimum

    -135 V

  • Grid No. 1 cutoff voltage maximum

    -58 V

  • Peak heater-to-cathode voltage

    180 V

  • Peak voltage between accelerator and any deflection plate

    600 V

  • Grid No. 1 negative bias maximum

    200 V

  • Anode No. 2 input maximum

    6 W

  • Post-accelerator to accelerator voltage ratio

    2 ratio