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Specialized - Cathode Ray ·CathodeRay

10KP7A

High-resolution magnetically focused and deflected P7 cathode-ray display tube, with blue-white fluorescence, long yellow phosphorescence, approximately 50-degree deflection, and typical 9 kV anode operation.

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

Description

The Sylvania 10KP7A is a 10-inch long-persistence P7 cathode-ray tube with magnetic focus and deflection.

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

  • Heater Voltage

    6.3 V

  • Heater Current

    600 mA

  • Focusing Method

    Magnetic text

  • Deflection Method

    Magnetic text

  • Deflection Angle

    50 deg

    Approximate

  • Phosphor

    P7 text

  • Fluorescence

    Blue-White text

  • Phosphorescence

    Yellow text

  • Persistence

    Long text

  • Screen Aluminized

    No text

  • High Resolution

    Yes text

  • Light Transmittance

    77 percent

    Approximate

  • Cathode-to-All Capacitance

    5 pF

    Approximate

  • Grid1-to-All Capacitance

    8 pF

    Approximate

  • Maximum Line Width

    0.38 mm

    10KP7A/10KP7B

Other

  • Maximum Anode Voltage

    11000 V

  • Maximum Grid2 Voltage

    770 V

  • Maximum Grid1 Negative Bias

    200 V

  • Maximum Grid1 Positive Peak

    2 V

  • Anode Voltage

    9000 V

  • Grid2 Voltage

    250 V

  • Grid1 Cutoff Voltage Minimum

    -53 V

  • Grid1 Cutoff Voltage Maximum

    -27 V

  • Focusing Coil Current

    112 mA

    Approximate; ±15%

  • Maximum Grid1 Circuit Resistance

    1.5 Mohm