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Specialized - Cathode Ray ·CathodeRay

17RP4C

High-voltage P4 cathode-ray picture-display tube using magnetic deflection, with manufacturer data supporting wide-angle scanning and typical anode operation in the 12–14 kV range.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
DUODECAL5
Base pins
5
Nominal heater
6.3 V / 600 mA

Description

17RP4C — Direct-View Cathode Ray Picture Tube

The 17RP4C is a direct-view cathode ray picture tube designed specifically for television applications. It features a rectangular glass construction, electrostatic focusing, and magnetic deflection. The tube is built with a unipotential cathode, an external conductive coating, a grey filter faceplate, and requires an external single field ion trap.

The 17RP4C is identical to the 17RP4 except that the 17RP4C incorporates an aluminized screen.

Mechanical and Physical Specifications

The physical structure of the 17RP4C is defined by its rectangular bulb and specific alignment requirements.

Dimensions

  • Overall Length: 19 1/4 ± 3/8 inches
  • Greatest Bulb Dimensions:
    • Diagonal: 16 5/8 ± 1/8 inches
    • Width: 15 3/8 ± 1/8 inches
    • Height: 12 1/4 ± 1/8 inches
  • Minimum Useful Screen Dimensions:
    • Diagonal: 15 1/2 inches
    • Width: 14 1/4 inches
    • Height: 10 3/4 inches

Base and Bulb Connections

The tube utilizes a small shell duodecal 6-pin base (B6-63) with a 12L basing arrangement. The high-voltage anode connection is made via a recessed small cavity cap (J1-21). This bulb contact is aligned with pin position #6 within a tolerance of ± 30 degrees.

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

Optical and Deflection Characteristics

The 17RP4C utilizes magnetic deflection to sweep the electron beam across its rectangular screen.

  • Deflection Angles:
    • Horizontal: 66°
    • Diagonal: 70°

Optical Properties

The screen is coated with Phosphor No. 4, which produces a white fluorescent and white phosphorescent output with medium persistence. The grey filter faceplate provides a light transmission of approximately 66% at the center of the screen.

Direct Interelectrode Capacitances

The approximate capacitances of the tube's electrodes are as follows:

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

Electrical Ratings and Operating Conditions

The ratings for the 17RP4C are established under the Design Center system. Operating the tube beyond these limits may impair performance or cause permanent damage.

Design Center Maximum Ratings

  • Heater Voltage: 6.3 Volts
  • Heater Current: 0.6 Ampere
  • Maximum DC Anode and Grid No. 3 Voltage: 16,000 Volts
  • Maximum DC Anode No. 1 Voltage: -500 to +1000 Volts
  • Maximum DC Grid No. 2 Voltage: 500 Volts
  • Maximum Grid No. 1 Voltage:
    • DC Negative-Bias Value: 125 Volts
    • DC Positive-Bias Value: 0 Volts
    • Positive-Peak Value: 2 Volts
  • Maximum DC Peak Heater-Cathode Voltage:
    • Heater negative to cathode (during warm-up ≤ 15 seconds): 410 Volts
    • Heater negative to cathode (after warm-up): 180 Volts
    • Heater positive to cathode: 180 Volts
  • Maximum Grid No. 1 Circuit Resistance: 1.5 Megohms

Typical Operating Conditions

Under typical operating conditions, the focusing electrode (Anode No. 1) is operated at ground potential but can be modulated to optimize overall focus across the screen area.

  • DC Anode and Grid No. 3 Voltage: 12,000 Volts
  • DC Anode No. 1 Voltage (Focusing Electrode): 0 Volts (modulation permitted for improved focus)
  • DC Grid No. 2 Voltage: 300 Volts
  • DC Grid No. 1 Voltage: -33 to -77 Volts (for visual extinction of the undeflected focused spot)
  • DC Ion Trap Current: 75 ± 50% mA (using Standard Coil No. 111)

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
-
Socket code
DUODECAL5
Base pins
5
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
16 V
Max screen voltage
5 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

Characteristics

  • FACEPLATE LIGHT TRANSMISSION

    65 percent

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • HEATER POSITIVE WITH RESPECT TO CATHODE

    1 V

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • DC ANODE S GRID #} VOLTAGE

    12 V

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • DC ANODE #1 VOLTAGE (FOCUSING EIECTR00E)A

    1 V

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • DC GRID #2 VOLTAGE — value 1

    2 V

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • DC GRID #2 VOLTAGE — value 2

    3 V

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • DC ION TRAP CURRENT STANDARD COIL #111 (APPROX.) — value 1

    111 mA

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • DC ION TRAP CURRENT STANDARD COIL #111 (APPROX.) — value 2

    75 mA

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • DC ION TRAP CURRENT STANDARD COIL #111 (APPROX.) — value 3

    5 mA

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

Other

  • MAXIMUM OC ANODE, GRID #} VOLTAGE

    16 V

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • MAXIMUM DC ANODE #1 VOLTAGE — value 1

    1 V

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • MAXIMUM DC ANODE #1 VOLTAGE — value 2

    -5 V

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • MAXIMUM DC GRID #2 VOLTAGE — value 1

    2 V

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • MAXIMUM DC GRID #2 VOLTAGE — value 2

    5 V

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • MAXIMUM GRID #1 VOLTAGE

    1 V

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • MAXIMUM GRID #1 CIRCUIT RESISTANCE — value 1

    1 mA

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • MAXIMUM GRID #1 CIRCUIT RESISTANCE — value 2

    1 mA

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • MAXIMUM GRID #1 CIRCUIT RESISTANCE — value 3

    5 mA

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.