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Specialized - Cathode Ray ·CathodeRay

17HP4A

Seventeen-inch direct-view television picture tube with magnetic focusing, magnetic deflection, and a white P4 screen. Its approximately 90-degree deflection system and high-voltage operation are intended for large-screen monochrome receiver display service.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
66-63
Socket code
DUODECAL5
Base pins
6
Nominal heater
6.3 V / 600 mA

Description

17HP4A — Cathode Ray Picture Tube

The 17HP4A is a direct-view rectangular glass cathode ray picture tube designed primarily for television applications. It features electrostatic focusing and magnetic deflection, utilizing a unipotential cathode. The tube is constructed with an external conductive coating and requires an external single-field ion trap.

Physical and Optical Characteristics

The 17HP4A is characterized by its rectangular glass envelope and specific faceplate construction. It features a grey frosted filter faceplate, which distinguishes it from the related 17HP4 (which has a plain grey filter faceplate) and the 17HP4B (which features an aluminized screen).

Dimensional Specifications

  • Overall Length: 19 3/16 ± 3/8 inches
  • Greatest Diagonal Dimension: 16 5/8 ± 1/8 inches
  • Greatest Width: 15 3/8 ± 1/8 inches
  • Greatest Height: 12 1/4 ± 1/8 inches
  • Minimum Useful Screen Width: 14 5/16 inches
  • Minimum Useful Screen Height: 10 3/4 inches
  • Raster Size: 10 3/4 inches by 14 1/4 inches

Optical and Deflection Data

The tube utilizes Phosphor No. 4, which produces a white fluorescent color and a white phosphorescent color with medium persistence. The faceplate light transmission at the center is approximately 66%. The deflection angles of the tube are approximately:

  • Horizontal Deflection Angle: 65 degrees
  • Diagonal Deflection Angle: 70 degrees

Base, Pinout, and Electrode Connections

The 17HP4A uses a small shell duodecal 6-pin base (designation B6-63) with a 12L basing arrangement. High-voltage connections to Grid No. 3, Grid No. 5, and the collector are made via a recessed small cavity cap (designation J1-21) located on the bulb. This bulb contact aligns with pin position #6 within a tolerance of ± 30 degrees.

The pin connections, viewed from the bottom of the base, are assigned as follows:

Pin NumberConnection
Pin 1Heater
Pin 2Grid No. 1
Pin 6Grid No. 4
Pin 10Grid No. 2
Pin 11Cathode
Pin 12Heater
Anode CapGrid No. 3, Grid No. 5, Collector

Electrical Ratings and Operating Conditions

The electrical limits and typical operating parameters of the 17HP4A are defined under the design center rating system.

Design Center Maximum Ratings

  • Heater Voltage: 6.3 Volts
  • Heater Current: 0.6 Ampere
  • Maximum DC Grid No. 3, Grid No. 5, and Collector Voltage: 16,000 Volts
  • Maximum DC Grid No. 4 Voltage: 500 Volts
  • Maximum DC Grid No. 2 Voltage: 500 Volts
  • Maximum Grid No. 1 Voltage (DC Negative-Bias): 125 Volts
  • Maximum Grid No. 1 Voltage (DC Positive-Bias): 0 Volts
  • Maximum Grid No. 1 Voltage (Positive-Peak): 2 Volts
  • Maximum Grid No. 1 Circuit Resistance: 1.5 Megohms

Heater-Cathode Voltage Ratings

The maximum DC peak heater-cathode voltage limits depend on the operating state of the equipment:

  • Heater negative with respect to cathode during warm-up (not to exceed 15 seconds): 410 Volts
  • Heater negative with respect to cathode after equipment warm-up: 180 Volts
  • Heater positive with respect to cathode: 180 Volts

Typical Operating Conditions

Under typical operating conditions, the tube is configured with the following electrical parameters:

  • DC Grid No. 3, Grid No. 5, and Collector Voltage: 14,000 Volts
  • DC Grid No. 4 Voltage: -56 to 310 Volts
  • DC Grid No. 2 Voltage: 300 Volts
  • DC Grid No. 1 Voltage (for visual extinction of undeflected focused spot): -33 to -77 Volts
  • DC Ion Trap Current (using Standard Coil No. 111): Approximately 85 mA

Interelectrode Capacitances

The direct interelectrode capacitances of the 17HP4A are approximately:

  • Cathode to all other electrodes: 5 µµf
  • Grid No. 1 to all other electrodes: 6 µµf
  • External conductive coating to anode (Maximum): 1,500 µµf
  • External conductive coating to anode (Minimum): 750 µµf

Socket description

Small-shell Duodecal 5-contact CRT base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
66-63
Socket code
DUODECAL5
Base pins
6
Nominal heater voltage
6.3 V
Nominal heater current
600 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

66-63 - 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 screen voltage
500 V

CRT-specific electrode/focus/deflection data retained as parameter rows.

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

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Maximum Anode Voltage

    18000 V

  • Typical Anode Voltage

    14000 V

  • Maximum Grid2 Voltage

    500 V

  • Typical Grid2 Voltage

    300 V

Characteristic

  • FocusingMethod

    Magnetic

  • DeflectingMethod

    Magnetic

  • DeflectionAngleApproximate

    90 degree

  • PhosphorNumber

    4

  • FluorescentColor

    White

  • Variant

    Published faceplate/screen variant on shared datasheet

Data set 02

1966 Tung Sol Electronic Tubes 4 of 4

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Maximum Grid No. 2 voltage

    500 V

    Published maximum Grid No. 2 voltage

  • FACEPLATE LIGHT TRANSMISSION AT CENTER (APPROX.)

    66 %

    FACEPLATE LIGHT TRANSMISSION AT CENTER (APPROX.) 66 PERCENT

  • HEATER VOLTAGE

    6.3 V

    HEATER VOLTAGE 6.3 voLTs

  • HEATER CURRENT

    600 mA

    HEATER CURRENT O.6 AMP.

  • MAXIMUM DC GRID #3, GRID #5, COLLECTOR \'OL TA GE

    16000 V

    MAXIMUM DC GRID #3, GRID #5, COLLECTOR \'OL TA GE 16 O00 VOLTS

  • MAXIMUM DC GRID #4 VOLTAGE

    500 V

    MAXIMUM DC GRID #4 VOLTAGE 500 voLTs

  • MAXIMUM DC GRID #2 VOLTAGE

    500 V

    MAXIMUM DC GRID #2 VOLTAGE 5OO VOLTS

  • (EATER POSITIVE WITH RESPECT TO CATHODE IS

    0 V

    (EATER POSITIVE WITH RESPECT TO CATHODE ISO VOLTS

  • DC GRID #3, GRID #5, COLLECTOR VOLTAGE

    14000 V

    DC GRID #3, GRID #5, COLLECTOR VOLTAGE 14 000 voLTs

  • DC GRID #4 VOLTAGE —56 r

    310 V

    DC GRID #4 VOLTAGE —56 ro 310 voLTs

  • DC GRID #2 VOLTAGE

    300 V

    DC GRID #2 VOLTAGE 300 voLTs

  • OC GRID #1 VOLTAGE A —33 To —

    77 V

    OC GRID #1 VOLTAGE A —33 To —77 voLTs

  • DC ION TRAP CURRENT STANDARD COIL #111 (APPROX.)

    85 mA

    DC ION TRAP CURRENT STANDARD COIL #111 (APPROX.) 85 MA.

Characteristic

  • CATHODE TO ALl OTHER ELECTRODES

    5 ΜΜF

    CATHODE TO ALl OTHER ELECTRODES 5 µµf

  • GRID #i TO ALL OTHER ELECTRODES

    6 ΜΜF

    GRID #i TO ALL OTHER ELECTRODES 6 µµf

  • MAXIMUM EXTERNAL CONDUCTIVE COATING TO ANODE

    1500 ΜΜF

    MAXIMUM EXTERNAL CONDUCTIVE COATING TO ANODE 1 5OO µµf

  • MINIMUM EXTERNAL CONDUCTIVE COATING TO ANODE

    750 ΜΜF

    MINIMUM EXTERNAL CONDUCTIVE COATING TO ANODE 75O µµf