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Specialized - Cathode Ray ·CathodeRay

5BNP16

Five-inch flying-spot scanner CRT with electrostatic focusing, magnetic deflection, clear faceplate, and an aluminized P16 ultraviolet-emitting screen. Its high-voltage anode system reaches about 19.8 kV for optical scanning.

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

Description

Five-inch flying-spot scanner CRT with electrostatic focus, magnetic deflection, clear faceplate, and aluminized P16 ultraviolet-emitting screen.

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
12M
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

12M - 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
19800 V

Cathode-ray 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

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Heater Voltage

    6.3 V

    Nominal

  • Heater Current

    600 mA

    Nominal

Data set 02

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Capacitance

  • Cathode to all other electrodes capacitance

    5 pF

  • Grid No. 1 to all other electrodes capacitance

    6 pF

Other

  • Maximum anode voltage

    19800 V

  • Grid No. 4 focus voltage range

    -550 to 1100 V

  • Maximum grid No. 2 voltage

    550 V

  • Peak heater-cathode voltage during warm-up

    450 V

  • Peak heater-cathode voltage after warm-up

    200 V

  • Typical anode voltage

    14000 V

  • Typical grid No. 4 focus voltage range

    -50 to 350 V

  • Typical grid No. 2 voltage

    300 V

  • Grid No. 1 cutoff voltage range

    -72 to -28 V

CircuitValue

  • Grid No. 1 circuit resistance maximum

    1.5 MOhm