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Diode (NOT rectifier) ·Diode-Diode

6887

RCA twin diode designed specifically for switching circuits in medium-speed electronic computers, using a relatively low-wattage heater for economical digital operation.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 200 mA

Description

The RCA 6887 is a twin diode for switching circuits in medium-speed electronic computers; low-wattage heater.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B9A
Base pins
9
Nominal heater voltage
6.3 V
Nominal heater current
200 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

2 physical sections, each with unique specifications.

Section 1

Diode

X-ray radiationInterelectrode capacitances
Rectifier peak inverse voltage
360 V
Rectifier nominal output current
10 mA
Rectifier peak forward current
30 mA
Rectifier max heater-cathode voltage
150 V

Representative electrical row for repeated identical physical sections.

Section 2

Diode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Physical second diode section added during approved section-structure reconciliation.

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

1960 RCA Industrial and Communications Types

Published operating points and test conditions from this source.

SECTION 1

Diode

Characteristics

  • Heater Voltage

    6.3 V

Data set 02

1971 RCA HB3 Binder 3 of 7

Published operating points and test conditions from this source.

SECTION 1

Diode

Other

  • Heater voltage

    6.3 V

    Nominal

  • Heater current

    200 mA

    Nominal

  • Maximum peak inverse plate voltage

    360 V

    Promoted published value

  • Maximum heater-cathode voltage

    150 V

    Promoted published value

  • PEAK INVERSE PLATE VOLTAGE

    360 V

    Maximum Ratings, Absolute Values:

  • PEAK PLATE CURRENT■

    30 mA

    Maximum Ratings, Absolute Values:

  • DC PLATE CURRENT

    10 mA

    Maximum Ratings, Absolute Values:

  • Heater negative with respect to cathode.

    150 V

    Maximum Ratings, Absolute Values:

  • Heater positive with respect to cathode.

    150 mA

    Maximum Ratings, Absolute Values:

  • Heater Current

    220 mA

    CHARACTERISTICS RANGE VALUES FOR EQUIPMENT DESIGN

  • Note

    6.3 V

    CHARACTERISTICS RANGE VALUES FOR EQUIPMENT DESIGN

  • Note

    150 V

    CHARACTERISTICS RANGE VALUES FOR EQUIPMENT DESIGN

  • Under the fol lowing conditions: heater volts =

    7.5 V

    CHARACTERISTICS RANGE VALUES FOR EQUIPMENT DESIGN

Characteristic

  • Peak forward/plate current

    30 mA

    Promoted published value

  • Nominal/DC output current

    10 mA

    Promoted published value

  • Voltage

    6.3 V

  • Current

    200 mA

  • Plate Current (Each unit)

    9 mA

    CHARACTERISTICS RANGE VALUES FOR EQUIPMENT DESIGN

  • Note

    2 V

    CHARACTERISTICS RANGE VALUES FOR EQUIPMENT DESIGN

  • Note

    300 V

    CHARACTERISTICS RANGE VALUES FOR EQUIPMENT DESIGN

  • with respect to cathode, and plate volts =

    0 V

    CHARACTERISTICS RANGE VALUES FOR EQUIPMENT DESIGN