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Voltage Dual Pentode ·Pentode-Pentode

15LE8

Twin-pentode television tube used as a combined color demodulator and matrix amplifier in high-level color-demodulation systems.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
9QZ
Socket code
B9A
Base pins
9
Nominal heater
15 V / 300 mA

Description

Miniature type used as combined color demodulator and matrix amplifier in color television receivers utilizing high-level demodulation systems. Outlines section, 6G; requires miniature 9-contact socket. Types 10LE8 and 15LE8 are identical with type 6LE8 except 9QZ for heater ratings. 6LE8 10LE8 15LE8

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
9QZ
Socket code
B9A
Base pins
9
Nominal heater voltage
15 V
Nominal heater current
300 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

9QZ - 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

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
50000 Ω
Max plate voltage
300 V
Max screen voltage
150 V
Max plate dissipation
2 W

Published maximum ratings, characteristics, operating conditions, and capacitance material reviewed.

Section 2

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
50000 Ω
Max plate voltage
300 V
Max screen voltage
150 V
Max plate dissipation
2 W

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

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • For grid-No

    1.1 volts

    Published value from supplied target entry

  • For grid-No

    300 volts

    Published value from supplied target entry

  • Grid-No

    1

    Published value from supplied target entry

  • Heater Voltage (ac/dc)

    15 volts

    Published value from supplied target entry

  • Heater Current

    0.3 ampere

    Published value from supplied target entry

  • Heater Warm-up Time (Average)

    11 seconds

    Published value from supplied target entry

  • Plate Voltage (Each Unit)

    300 volts

    Published value from supplied target entry

  • Grid-No

    150 volts

    Published value from supplied target entry

  • Plate Dissipation (Each Unit)

    2 watts

    Published value from supplied target entry

  • Grid-No

    2 watts

    Published value from supplied target entry

  • Plate Voltage

    100 volts

    Published value from supplied target entry

  • Grid-No

    0 volts

    Published value from supplied target entry

  • Grid-No

    100 volts

    Published value from supplied target entry

  • Grid-No.l (Control-Grid) Voltage, Negative-bias value

    2.5 volts

    Published value from supplied target entry

  • Transconductance (App

    350

    Published value from supplied target entry

  • Plate Resistance (Approx.)

    50000 ohms

    Published value from supplied target entry

  • Plate Current

    7.6

    Published value from supplied target entry

  • Grid-No

    14.5

    Published value from supplied target entry

  • Grid-No.l Voltage for plate current of

    -7.2 volts

    Published value from supplied target entry

  • Grid-No.l Voltage for plate current of

    -6.3 volts

    Published value from supplied target entry

  • Grid-No

    -17.4 volts

    Published value from supplied target entry

  • Grid-No

    -16.5 volts

    Published value from supplied target entry