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Voltage Triode Pentode ·Pentode-Triode

5MQ8

Triode-pentode for color and monochrome television band-pass, video, sync, color-killer, matrix, and blanking circuits.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
9FA
Socket code
B9A
Base pins
9
Nominal heater
5.6 V / 600 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
9FA
Socket code
B9A
Base pins
9
Nominal heater voltage
5.6 V
Nominal heater current
600 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

9FA - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN1Base PinBG1 — Control Grid

Original chart label: 2G1; manufacturer verification pending

Unverified

EIA Base Connections, printed page 132, 9FA

PIN2Base PinBP — Plate (Anode)

Original chart label: 2P; manufacturer verification pending

Unverified

EIA Base Connections, printed page 132, 9FA

PIN3Base PinBK — Cathode

Original chart label: 2K; manufacturer verification pending

Unverified

EIA Base Connections, printed page 132, 9FA

PIN4Base Pin—H — Heater

Original chart label: H; manufacturer verification pending

Unverified

EIA Base Connections, printed page 132, 9FA

PIN5Base Pin—H — Heater

Original chart label: H; manufacturer verification pending

Unverified

EIA Base Connections, printed page 132, 9FA

PIN6Base PinAP — Plate (Anode)

Original chart label: 1P; manufacturer verification pending

Unverified

EIA Base Connections, printed page 132, 9FA

PIN7Base PinAG2 — Screen Grid

Original chart label: 1G2; manufacturer verification pending

Unverified

EIA Base Connections, printed page 132, 9FA

PIN8Base PinAG3 — Suppressor GridGroup 9FA8

Original chart label: 1G3; manufacturer verification pending

Unverified

EIA Base Connections, printed page 132, 9FA

PIN8Base PinAK — CathodeGroup 9FA8

Original chart label: 1K; manufacturer verification pending

Unverified

EIA Base Connections, printed page 132, 9FA

PIN8Base Pin—IS — Internal ScreenGroup 9FA8

Original chart label: IS; manufacturer verification pending

Unverified

EIA Base Connections, printed page 132, 9FA

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
330 V
Max plate dissipation
2.5 W

Published maximum ratings, characteristics, typical operation, rectifier data, and capacitances reviewed.

Section 2

Pentode

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

Published maximum ratings, characteristics, typical operation, rectifier data, and capacitances reviewed.

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

Triode

Characteristic

  • 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