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Voltage Triode Pentode ·Pentode-Triode

6MQ8

Combined triode-pentode for television video, sync, burst, IF, AGC, or related signal-processing circuits.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 535 mA

Description

Miniature type used in color and black-and-white tele- 0| i^/iXX/s //A^kt vision receiver applications. The pentode unit is used ±200 in band-pass-amplifier applications. The triode unit is Pf-' used in video-amplifier, sync-separator, color-killer- control, matrix-amplifier, and blanker applications. Outlines section, 6B; requires miniature 9-contact socket. Type 5MQ8 is identical with type 6MQ8 except for heater ratings. 5MQ8 6MQ8

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
535 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

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
150000 Ω
Transconductance
0.01 S
Amplification factor
40
Max plate voltage
125 V
Max plate dissipation
2.5 W

Published promoted values applied where applicable; additional ratings, characteristics, and operating data retained as parameters.

Section 2

Pentode

X-ray radiationInterelectrode capacitances
Max plate voltage
330 V
Max screen voltage
330 V
Max plate dissipation
2.5 W

Published promoted values applied where applicable; additional ratings, characteristics, and operating data retained as parameters.

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

1971 RCA HB3 Binder 5 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Heater Voltage, ac or do — published value 1

    6.3 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Heater Voltage, ac or do — published value 2

    10 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Heater Current

    535 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Grid to plate

    1.7 pF

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Grid No.l to plate

    0.045 pF

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Amplification Factor

    40 A

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Plate Resistance (Approx.) rp — published value 1

    5

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Plate Resistance (Approx.) rp — published value 2

    150

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Transconductance — published value 1

    8500

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Transconductance — published value 2

    10000

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • DC Plate Current — published value 1

    18 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • DC Plate Current — published value 2

    12 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • DC Grid-No.2 Current

    4.5 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Voltage forIb =20µA — published value 1

    20 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Voltage forIb =20µA — published value 2

    -12 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Voltage forIb =20µA — published value 3

    -7 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Heater Voltage — published value 1

    6.3 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Heater Voltage — published value 2

    6.3 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • DC Plate Voltage — published value 1

    150 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • DC Plate Voltage — published value 2

    125 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • DC Grid-No.2 Voltage

    125 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Cathode Resistance — published value 1

    56

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Cathode Resistance — published value 2

    62

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Pin 1 - Triotle Plate

    1

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Pin 4 -Heater

    4

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Pin 5 -Heater

    5

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Pin 8 -Triode Cathode

    8

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Pin 9 -Triode Grid

    9

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • DC Plate Voltage — published value 1

    330 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • DC Plate Voltage — published value 2

    330 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Voltage

    330 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Positive-bias value — published value 1

    0

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Positive-bias value — published value 2

    0

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Heater Current — published value 1

    500 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Heater Current — published value 2

    570 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • No.2 voltages up to 165

    165 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Plate Dissipation — published value 1

    2.7

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Plate Dissipation — published value 2

    2.5

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • For fixed-bias opezation Rgl(ckt) — published value 1

    0.5

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • For fixed-bias opezation Rgl(ckt) — published value 2

    0.25

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • For cathode-bias operation — published value 1

    0.5

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • For cathode-bias operation — published value 2

    0.5

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • As defined in the current issue of EIA Standard RS-239

    239

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • GRID-No.2 VOLTS=125

    125 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • PLATE (Ip) OR GRID-No. 2 (I~ 2) MILLIAMPERES — published value 1

    2 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • PLATE (Ip) OR GRID-No. 2 (I~ 2) MILLIAMPERES — published value 2

    2 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • PLATE VOLTS=125

    125 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • GRID-No.2 VOLTS 25 — published value 1

    25 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • GRID-No.2 VOLTS 25 — published value 2

    1 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

SECTION 2

Pentode

Characteristics

  • Pin 2 -Pentode Grid No.l

    2

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Pin 3 -Pentode Grid No.2

    3

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Pin 6 -Pentode Plate

    6

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Pin 7 -Pentode Cathode, Grid No.3 and

    7

    Published datasheet value; multiple values represent separate source-table limits or conditions.

Data set 02

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Heater Voltage (ac/dc)

    6.3 volts

    Published value from supplied target entry

  • Heater Current

    0.535 ampere

    Published value from supplied target entry

  • Heater Warm-up Time

    11 seconds

    Published value from supplied target entry

  • DC Plate Voltage

    330 volts

    Published value from supplied target entry

  • DC Grid-No

    2

    Published value from supplied target entry

  • Plate Dissipation

    2.5 watts

    Published value from supplied target entry

  • Grid-No

    2

    Published value from supplied target entry

  • For grid-No

    165 volts

    Published value from supplied target entry

  • For grid-No

    300 volts

    Published value from supplied target entry

  • DC Plate Voltage

    125 volts

    Published value from supplied target entry

  • Amplification Factor

    40

    Published value from supplied target entry

  • Plate Resistance (Approx.)

    150

    Published value from supplied target entry

  • Transconductance

    10000

    Published value from supplied target entry

  • DC Plate Current

    12 mA

    Published value from supplied target entry

  • Grid-No.l Voltage for plate current of

    100

    Published value from supplied target entry

  • Heater Voltage

    6.3 volts

    Published value from supplied target entry

  • Heater Current

    0.6 ampere

    Published value from supplied target entry

  • Heater to Triode Cathode

    4.4

    Published value from supplied target entry

Capacitance

  • Grid to Plate

    1.7 pF

    Published value from supplied target entry

  • Plate to Cathode, Heater, Grid No

    2

    Published value from supplied target entry

  • Grid to Plate

    2.2 pF

    Published value from supplied target entry

  • Heater to Pentode Cathode

    5.5 pF

    Published value from supplied target entry

  • Pentode Plate to Triode Plate

    0.09 pF

    Published value from supplied target entry