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Specialized - Cathode Ray ·CathodeRay

5CEP16

Five-inch flat optical-glass CRT for high-resolution photographic and oscillographic recording, using electrostatic focusing, magnetic deflection, and a fine-grain P16 screen for extremely fast, detailed recording.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
12Q
Socket code
DUODECAL6
Base pins
12
Nominal heater
6.3 V / 600 mA

Description

Five-inch flat optical-glass CRT for high-resolution photographic/oscillographic recording, with fine-grain P16 screen, electrostatic focus, and magnetic deflection.

Socket description

Small-shell Duodecal 6-contact CRT base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
12Q
Socket code
DUODECAL6
Base pins
12
Nominal heater voltage
6.3 V
Nominal heater current
600 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

12Q - 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
22000 V

CRT highest published anode/accelerating voltage is promoted to MaxPlateVoltage; additional electrode, deflection, optical, and capacitance data are retained as parameters.

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

Capacitance

  • Grid No. 1 to all other electrodes capacitance

    9 pF

  • Grid No. 2 to all other electrodes capacitance

    7 pF

  • Cathode to all other electrodes capacitance

    7 pF

Other

  • Maximum anode voltage

    22000 V

  • Maximum grid No. 3 focus voltage

    5000 V

  • Maximum grid No. 2 voltage

    600 V

  • Maximum negative grid No. 1 bias magnitude

    180 V

  • Peak heater-cathode voltage during warm-up

    450 V

  • Peak heater-cathode voltage after warm-up

    180 V

  • Typical anode voltage low-voltage condition

    10000 V

  • Typical anode voltage high-voltage condition

    20000 V

  • Typical focus voltage range at 10 kV

    2070 to 2370 V

  • Typical focus voltage range at 20 kV

    4140 to 4740 V

  • Typical grid No. 2 voltage

    300 V

  • Grid No. 1 cutoff voltage range

    -65 to -40 V

Characteristics

  • Typical line width

    0.0015 in

CircuitValue

  • Grid No. 1 circuit resistance maximum

    1.5 MOhm