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Specialized - Cathode Ray ·CathodeRay

MC616

High-voltage blue-violet very-short-persistence cathode-ray tube designed for flying-spot scanning, with magnetic focusing and deflection and approximately 25 kV operating voltage.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
B12A
Base pins
-
Nominal heater
6.3 V / 300 mA

Description

Metal-backed flying-spot scanner CRT with blue-violet very-short-persistence screen, magnetic focusing, and magnetic 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
300 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
25000 V

CRT-specific optical, focusing, deflection, accelerating-voltage, scan, capacitance, and safety data are retained in TUBE_SECTION_PARAMETER because the locked promoted fields primarily target conventional electrode sections.

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

1957 Philips Receiving and Amplifying Tubes

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Maximum Plate Voltage

    25000 V

  • Typical Anode Voltage

    25000 V

  • Maximum Anode Voltage

    25000 V

Characteristic

  • Focusing Method

    Magnetic

  • Deflection Method

    Magnetic

  • Screen

    Blue-violet, very short persistence

Data set 02

1963 Philips Electron Tubes Handbook V2

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Heater voltage

    6.3 V

    CathodeRay

  • Heater current

    300 mA

    CathodeRay

  • Useful screen diameter minimum

    57.5 mm

    FlyingSpotScanner

  • Anode and grid No.2 voltage

    25 kV

    FlyingSpotScanner

  • Grid No.1 cutoff voltage minimum

    40 V

    FlyingSpotScanner

  • Grid No.1 cutoff voltage maximum

    90 V

    FlyingSpotScanner

  • Focusing ampere-turns

    855 At

    FlyingSpotScanner

  • Beam current minimum

    15 µA

    FlyingSpotScanner

  • Beam current maximum

    30 µA

    FlyingSpotScanner

Construction

  • Focusing

    Magnetic

    CathodeRay

  • Deflection

    Magnetic

    CathodeRay

  • Screen color

    Blue violet

    CathodeRay

  • Screen persistence

    Very short

    CathodeRay

Characteristic

  • Deflection angle approximately

    40 deg

    FlyingSpotScanner

Data set 03

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Useful screen diameter

    57.5 mm

Characteristic

  • Grid-heater capacitance

    6.3 pF

  • Screen persistence

    very short

  • Screen colour

    blue violet