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Specialized - Cathode Ray ·CathodeRay

SC3042

Five-inch flat-face high-resolution mono-accelerator CRT with electrostatic focusing and deflection. Sylvania documentation gives approximately 5 kV anode capability for precision instrument display.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
DIHEPTAL12
Base pins
-
Nominal heater
6.3 V / 600 mA

Description

The Sylvania SC3042 is a 5-inch flat-face high-resolution mono-accelerator CRT with electrostatic focus and deflection.

Socket description

Medium-shell Diheptal 12-contact CRT base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
DIHEPTAL12
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
Max plate voltage
5000 V

Published ratings and characteristics promoted semantically from the approved source.

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

  • Maximum Plate Voltage

    5000 V

  • Typical Anode Voltage

    3000 V

Characteristic

  • Focusing Method

    Electrostatic

  • Deflecting Method

    Electrostatic

Data set 02

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

  • Maximum Line Width

    0.01 in

    30VAboveSpotCutoff

  • Useful Scan Plates 1-2

    4.5 in

    Minimum

  • Useful Scan Plates 3-4

    4 in

    Minimum

Other

  • Maximum Anode2 Voltage

    5000 V

  • Maximum Anode1 Voltage

    3000 V

    FocusElectrode

  • Maximum Grid1 Negative Bias

    220 V

  • Maximum Grid1 Positive Peak

    2 V

  • Maximum Anode2-to-Deflection-Plate Voltage

    550 V

    AbsoluteMagnitude

  • Maximum Heater-Cathode Voltage

    200 V

    EitherPolarity

  • Anode2 Voltage

    3000 V

  • Grid1 Cutoff Voltage Minimum

    -96 V

  • Grid1 Cutoff Voltage Maximum

    -64 V

  • Focus Voltage Minimum

    1000 V

    Anode1

  • Focus Voltage Maximum

    1600 V

    Anode1

  • Deflection Factor Plates 1-2 Minimum

    80 V/in

  • Deflection Factor Plates 1-2 Maximum

    100 V/in

  • Deflection Factor Plates 3-4 Minimum

    40 V/in

  • Deflection Factor Plates 3-4 Maximum

    50 V/in