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Specialized - Cathode Ray ·CathodeRay

5AMP7

Five-inch P7 electrostatic cathode-ray tube for oscillograph and precision-instrument display, with manufacturer-defined accelerating, focusing, and deflection characteristics.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
B14A
Base pins
-
Nominal heater
6.3 V / 600 mA

Description

Five-inch special-purpose/instrument CRT with electrostatic focus, electrostatic deflection, and P7 phosphor (Blue-white / yellow afterglow, long persistence).

Socket description

Large readout/Nixie 14-contact base, 44.5 mm pin circle

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B14A
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
6600 V

Published Sylvania CRT ratings, focus/deflection conditions, capacitances, cutoff/modulation values, and tolerance data retained where legible.

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

Characteristics

  • Focusing method

    Electrostatic

  • Deflection method

    Electrostatic

  • Heater voltage

    6.3 V

  • Heater current

    600 mA

  • Fluorescence

    Blue-white / yellow afterglow

  • Persistence

    Long

  • Deflection-factor uniformity maximum

    1 %

  • Line width maximum

    0.032 in

  • Useful scan minimum

    4 x 2.5 in

Construction

  • Phosphor

    P7

Application

  • Application

    Oscilloscope / instrument / special-purpose display

Other

  • Anode-2 voltage maximum

    6600 V

  • Anode-1 focus voltage maximum

    1650 V

  • Typical anode-2 voltage

    2500 V

  • Typical focus voltage range

    0 to 300 V

  • Grid-1 circuit resistance maximum

    1.5 Mohm

  • Deflection-circuit resistance maximum

    1 Mohm

  • Anode-2 input maximum

    6 W