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Specialized - Cathode Ray ·CathodeRay

SC3814

Special-purpose electrostatically focused and deflected CRT with a P7 long-persistence screen, suitable for instrument displays requiring retained electronic traces.

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

Description

Sylvania SC3814 special-purpose CRT with electrostatic focus and electrostatic deflection; P7. Published high-voltage ratings, focus/deflection data, capacitances, circuit limits, and typical operating conditions were extracted from the supplied datasheet.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
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
4000 V

Special-purpose cathode-ray tube; published ratings and construction data captured.

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

Characteristics

  • Focusing method

    Electrostatic

  • Deflection method

    Electrostatic

Application

  • Application

    Electrostatic charge printing

Construction

  • Multiple independent guns

    Yes

Data set 02

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristic

  • Heater Voltage

    6.3 V

  • Heater Current

    1.8 A

  • FocusingMethod

    Electrostatic

  • DeflectionMethod

    Electrostatic

  • PhosphorOrScreen

    P7

  • UsefulScreenOrScan

    9 x 2.5 inch scan

  • UsefulScanD1D2

    9 in

  • UsefulScanD3D4

    2.5 in

  • HorizontalTraceParallelismMaximum

    0.55 degree

  • Grid1 To All Capacitance

    8 pF

  • Cathode To All Capacitance

    6 pF

Other

  • AnodeVoltageMaximum

    4000 V

  • Grid1NegativeBiasMagnitudeMaximum

    220 V

  • Grid1PositiveBiasMaximum

    0 V

  • Grid1PositivePeakVoltageMaximum

    2 V

  • Grid1CircuitResistanceMaximum

    1.5 Mohm

  • HeaterCathodeVoltageMaximum

    200 V

    AfterWarmup

  • Anode Voltage

    4000 V

  • FocusElectrodeVoltage

    900 to 1300 V

  • Grid1VoltageForCutoff

    -70 to -120 V

  • DeflectionFactorD1D2

    80 to 100 V/in

  • DeflectionFactorD3D4

    38 to 52 V/in