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Specialized - Cathode Ray ·CathodeRay

5BHP2

Five-inch oscilloscope CRT with electrostatic focusing and deflection and a P2 phosphor screen. The family uses a flat face and high-sensitivity electron optics for direct waveform and instrument display.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
NEOEIGHTAR7
Base pins
-
Nominal heater
6.3 V / 600 mA

Description

Sylvania 5-inch cathode-ray tube with electrostatic focus, electrostatic deflection, and P2 blue-green/green, long persistence. Published electrical ratings, capacitances, and operating conditions were extracted from the supplied datasheet.

Socket description

Small-button Neoeightar 7-contact CRT base family

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
NEOEIGHTAR7
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
13200 V

Published maximum ratings and characteristics audited; remaining numeric data retained densely in parameter table.

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

Characteristic

  • Heater Voltage

    6.3 V

  • Heater Current

    600 mA

  • FocusingMethod

    Electrostatic

  • DeflectionMethod

    Electrostatic

  • Phosphor

    P2 blue-green/green, long persistence

  • MinimumUsefulScreen

    4.5 in

  • Cathode To All Capacitance

    4.6 pF

  • GridToAllCapacitance

    6.4 pF

  • BetweenDeflectionPlates1_2Capacitance

    1.9 pF

  • BetweenDeflectionPlates3_4Capacitance

    1.5 pF

  • PostAcceleratorHelixResistance

    200 to 600 Mohm

  • PatternDistortionMaximum

    1.5 %

  • UndeflectedSpotPositionMaximum

    5 mm

  • UsefulScanD1D2

    10 cm

  • UsefulScanD3D4

    4 cm

Other

  • FinalAnodeVoltageMaximum

    13200 V

  • Anode2VoltageMaximum

    2200 V

  • FocusElectrodeVoltageMaximum

    880 V

  • FinalAnodeVoltage

    10000 V

  • Anode2Voltage

    1670 V

  • FocusElectrodeVoltageForFocus

    180 to 590 V

  • GridVoltageForCutoff

    -50 to -80 V

  • GridCircuitResistanceMaximum

    1.5 Mohm

  • DeflectionFactorPlates1_2

    70 to 85 V/in

  • DeflectionFactorPlates3_4

    15 to 18.3 V/in

  • Anode2InputMaximum

    6 W

  • IsolationShieldVoltageMaximum

    2300 V

  • DeflectionPlateShieldVoltageMaximum

    2300 V

  • Anode3ToAnode2VoltageRatioMaximum

    6

  • PeakVoltageAnode2ToDeflectionPlate

    550 V

Data set 02

1971 NEC

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • NEC [1]

    5 V

    NEC 5BHP2 is a 5 inch flat faced cathode ray tube Ratio Post Accelerator Voltage

  • NEC [2]

    5 V

    NEC 5BHP2 is a 5 inch flat faced cathode ray tube Ratio Post Accelerator Voltage

  • employing electrostatic focus and electrostatic deflec- to Accelerator Voltage

    6 V

    employing electrostatic focus and electrostatic deflec- to Accelerator Voltage 6 max.

  • tion. The tube incorporates post acceleration by use Focusing Voltage

    800 V

    tion. The tube incorporates post acceleration by use Focusing Voltage 800 max. Vdc

  • of a spiral band resistance winding which extends Grid No

    1 V

    of a spiral band resistance winding which extends Grid No. 1 Voltage

  • deflection plates. By the use of this gradient type Positive Bias Value

    0

    deflection plates. By the use of this gradient type Positive Bias Value 0 max. Vdc

  • of post acceleration, excellent deflection plate linea- Isolation Shield Voltage

    2100 V

    of post acceleration, excellent deflection plate linea- Isolation Shield Voltage 2,100 max. Vdc

  • rity and a minimum of pattern distortion can be ob- Deflection Plate Shield Voltage

    2100 V

    rity and a minimum of pattern distortion can be ob- Deflection Plate Shield Voltage 2,100 max. Vdc

  • than [1]

    6

    than 6 kV. for adequate light out put. to Cathode 180 max. Vdc

  • than [2]

    180

    than 6 kV. for adequate light out put. to Cathode 180 max. Vdc

  • GENERAL CHARACTERISTICS to Cathode

    180

    GENERAL CHARACTERISTICS to Cathode 180 max. Vdc

  • Heater Voltage

    6.3 V

    Heater Voltage: 6.3 Volts

  • Heater Current [1]

    0.6 V

    Heater Current: 0.6+10% Amperes Deflection plate Shield Voltage

  • Heater Current [2]

    10 V

    Heater Current: 0.6+10% Amperes Deflection plate Shield Voltage

  • Post Accelerator Voltage [1]

    10 V

    Post Accelerator Voltage 10, 000V

  • Post Accelerator Voltage [2]

    0 V

    Post Accelerator Voltage 10, 000V

  • Accelerator Voltage

    1670 V

    Accelerator Voltage 1,670 V

  • Fluorescence Green Isolation Shield Voltage (Note [1]

    3 V

    Fluorescence Green Isolation Shield Voltage (Note 3) 1,575 to 1,700V

  • Fluorescence Green Isolation Shield Voltage (Note [2]

    1575 V

    Fluorescence Green Isolation Shield Voltage (Note 3) 1,575 to 1,700V

  • Fluorescence Green Isolation Shield Voltage (Note [3]

    1700 V

    Fluorescence Green Isolation Shield Voltage (Note 3) 1,575 to 1,700V

  • Phosphorescence Green Focusing Voltage [1]

    180 V

    Phosphorescence Green Focusing Voltage 180 to 590

  • Phosphorescence Green Focusing Voltage [2]

    590 V

    Phosphorescence Green Focusing Voltage 180 to 590

  • Persistence Long Grid No [1]

    1 V

    Persistence Long Grid No. 1 Voltage (Note 4) —50 to —80V

  • Persistence Long Grid No [2]

    4 V

    Persistence Long Grid No. 1 Voltage (Note 4) —50 to —80V

  • Persistence Long Grid No [3]

    -50 V

    Persistence Long Grid No. 1 Voltage (Note 4) —50 to —80V

  • Persistence Long Grid No [4]

    -80 V

    Persistence Long Grid No. 1 Voltage (Note 4) —50 to —80V

  • Direct Interelectrode Capacitances X iand- X [1]

    27.6 pF

    Direct Interelectrode Capacitances X iand- X 27.6 to 33.5 Vdc/cm

  • Direct Interelectrode Capacitances X iand- X [2]

    33.5 pF

    Direct Interelectrode Capacitances X iand- X 27.6 to 33.5 Vdc/cm

  • Cathode to all other electrodes [1]

    4

    Cathode to all other electrodes 4. 6 pf

  • Cathode to all other electrodes [2]

    6

    Cathode to all other electrodes 4. 6 pf

  • Grid No [1]

    1

    Grid No. 1 to all other electrodes 6. 4 pf Deflection Factor Uniformity 2 % max.

  • Grid No [2]

    6

    Grid No. 1 to all other electrodes 6. 4 pf Deflection Factor Uniformity 2 % max.

  • Grid No [3]

    4

    Grid No. 1 to all other electrodes 6. 4 pf Deflection Factor Uniformity 2 % max.

  • Grid No [4]

    2

    Grid No. 1 to all other electrodes 6. 4 pf Deflection Factor Uniformity 2 % max.

  • Post-Accelerator Helix Resistance [1]

    200

    Post-Accelerator Helix Resistance 200 to X, X_ 100 mm

  • Post-Accelerator Helix Resistance [2]

    100

    Post-Accelerator Helix Resistance 200 to X, X_ 100 mm

  • Greatest Diameter of Bulb [1]

    133 V

    Greatest Diameter of Bulb 133+3 mm All voltages taken with respect to cathode.

  • Greatest Diameter of Bulb [2]

    3 V

    Greatest Diameter of Bulb 133+3 mm All voltages taken with respect to cathode.

  • Recessed Cavity Cap J1

    -21

    Recessed Cavity Cap J1-21 edge effect of the Y, Y_ plate field. Other applications

  • Post Accelerator Voltage [1]

    12 V

    Post Accelerator Voltage 12, 000 max. Vdc For an 4lb; of 15 uA.

  • Post Accelerator Voltage [2]

    0 V

    Post Accelerator Voltage 12, 000 max. Vdc For an 4lb; of 15 uA.

  • Post Accelerator Voltage [3]

    4 V

    Post Accelerator Voltage 12, 000 max. Vdc For an 4lb; of 15 uA.

  • Post Accelerator Voltage [4]

    15 V

    Post Accelerator Voltage 12, 000 max. Vdc For an 4lb; of 15 uA.

  • Accelerator Voltage [1]

    2 V

    Accelerator Voltage 2, 000 max. Vdc Alpy=Ipy

  • Accelerator Voltage [2]

    0 V

    Accelerator Voltage 2, 000 max. Vdc Alpy=Ipy