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Voltage Pentode or Tetrode (with diode) ·Diode-Tetrode

6KM8

Diode and three-plate tetrode for frequency-divider and complex-wave-generator circuits in electronic musical instruments, intended for pulse and timing service rather than ordinary amplification.

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

Description

Diode plus sharp-cutoff three-plate tetrode used in frequency-divider and complex-wave-generator circuits of electronic musical instruments.

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

9QG - 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
Max cathode current
1 mA
Rectifier nominal output current
1 A

Representative electrical section from supplied RCA data sheet.

Section 2

Tetrode

X-ray radiationInterelectrode capacitances
Plate resistance
30000 Ω
Transconductance
0.0034 S
Amplification factor
45
Max plate voltage
330 V
Max screen voltage
330 V
Max plate dissipation
1 W
Max screen dissipation
0.65 W

Representative electrical section from supplied RCA data sheet.

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

Diode

Other

  • Heater voltage nominal

    6.3 V

  • Heater current

    300 mA

  • PLATE CURRENT

    1 mA

    Published source row

  • Maximum cathode current

    1 mA

    Promoted field corroboration

Characteristics

  • Voltage (AC or DC)

    6.3 V

    Published table column

  • Current at heater volts =

    6.3 V

    Published table column

  • Plate Current for plate volts =

    10 V

    Published source row

  • Plate Current for plate volts = (value 2)

    2 V

    Published source row

SECTION 2

Tetrode

Other

  • Heater voltage nominal

    6.3 V

  • Heater current

    300 mA

  • GRID-No

    2

    Published source row

  • SUPPLY VOLTAGE

    330 V

    Published source row

  • GRID-No

    2 A

    Published source row

  • GRID-No

    2

    Published source row

  • For grid-No

    2

    Published source row

  • For grid-No

    2

    Published source row

  • PLATE lA DISSIPATION

    1 W

    Published source row

  • PLATE

    16 W

    Published source row

  • PLATE (value 2)

    1 W

    Published source row

  • PLATE

    2 W

    Published source row

  • PLATE (value 2)

    1 W

    Published source row

Characteristics

  • Voltage (AC or DC)

    0.6 V

    Published table column

  • Current at heater volts =

    0.3 V

    Published table column

  • Plate Voltage

    100 V

    Published source row

  • Grid-No

    2 V

    Published source row

  • Grid-No (value 2)

    100 V

    Published source row

  • Grid-No.l Supply Voltage

    0 V

    Published source row

  • Plate Resistance (Approx )

    30000 ohm

    Published source row

  • Transconductance

    3400 µS

    Published source row

  • Plate Current

    4.2 mA

    Published source row

  • Grid-No

    2 mA

    Published source row

  • Grid-No (value 2)

    1.7 mA

    Published source row

  • Grid No

    2

    Published source row

  • Plate Voltage

    100 V

    Published source row

  • Grid-No.l Supply Voltage

    0 V

    Published source row

  • Transconductance

    4500 µS

    Published source row

  • Plate Current

    5 mA

    Published source row

  • Plate Current (value 2)

    5 mA

    Published source row

  • Grid—No

    2 V

    Published source row

  • Grid—No (value 2)

    100 V

    Published source row

  • Grid—No.l Supply Voltage

    0 V

    Published source row

  • Grid—No

    2

    Published source row

  • GRID-No

    2 V

    Published source row

  • GRID-No (value 2)

    100 V

    Published source row

  • PLATE (Ib) OR GRID-No

    2

    Published source row

Capacitance

  • shield, grid No

    2 pF

    Published source row

  • shield, grid No (value 2)

    1.2 pF

    Published source row

  • shield, grid No

    2 pF

    Published source row

  • shield, grid No (value 2)

    1.3 pF

    Published source row

  • shield, grid No

    2 pF

    Published source row

  • shield, grid No (value 2)

    1.8 pF

    Published source row

Data set 02

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Diode

Other

  • Heater Voltage (ac/dc)

    6.3 V

    Published in approved 6KM8 target datasheet entry; Section1

  • Heater Current

    300 mA

    Published in approved 6KM8 target datasheet entry; Section1

  • Plate Voltage

    100 V

    Published in approved 6KM8 target datasheet entry; Section1

  • Grid-No.l Supply Voltage

    0 V

    Published in approved 6KM8 target datasheet entry; Section1

  • Grid-No.l Resistor (Bypassed)

    2.2 MΩ

    Published in approved 6KM8 target datasheet entry; Section1

  • Transconductance

    4500 µS

    Published in approved 6KM8 target datasheet entry; Section1

  • Plate Current

    6.6 mA

    Published in approved 6KM8 target datasheet entry; Section1

  • Plate Voltage 100 100

    100 V

    Published in approved 6KM8 target datasheet entry; Section1

  • Grid-No.2 Voltage 100 100

    100 V

    Published in approved 6KM8 target datasheet entry; Section1

  • Grid-No.l Supply Voltage 0 0

    0 V

    Published in approved 6KM8 target datasheet entry; Section1

  • Grid-No.l Resistor (Bypassed) 2.2 2.2

    2.2 MΩ

    Published in approved 6KM8 target datasheet entry; Section1

  • Transconductance 2000 2000

    1800 µS

    Published in approved 6KM8 target datasheet entry; Section1

  • Plate Resistance (Approx.) 0.1 0.1

    0.12 MΩ

    Published in approved 6KM8 target datasheet entry; Section1

  • Plate Current 2.3 2.3

    2.1 mA

    Published in approved 6KM8 target datasheet entry; Section1

  • Grid-No.2 Current 3.8 3.8

    3.3 mA

    Published in approved 6KM8 target datasheet entry; Section1

  • Plate Voltage (Each plate)

    330 V

    Published in approved 6KM8 target datasheet entry; Section1

  • Grid-No.2 (Screen-Grid) Supply Voltage

    330 V

    Published in approved 6KM8 target datasheet entry; Section1

  • Positive-bias value

    0 V

    Published in approved 6KM8 target datasheet entry; Section1

  • Negative-bias value

    50 V

    Published in approved 6KM8 target datasheet entry; Section1

  • Plate Dissipation (Each plate)

    1 W

    Published in approved 6KM8 target datasheet entry; Section1

  • For grid-No.2 voltages up to

    165 V

    Published in approved 6KM8 target datasheet entry; Section1

  • For grid-No.2 voltages up to 165 volts

    0.65 W

    Published in approved 6KM8 target datasheet entry; Section1

  • For grid-No.2 voltages between 165 and

    330 V

    Published in approved 6KM8 target datasheet entry; Section1

  • Grid-No.l-Circuit Resistance, for grid-No.l-resistor-bias operation

    2.2 MΩ

    Published in approved 6KM8 target datasheet entry; Section1

  • Plate Current

    1 mA

    Published in approved 6KM8 target datasheet entry; Section1

  • Tube Voltage Drop for plate current of

    2 mA

    Published in approved 6KM8 target datasheet entry; Section1

  • Tube Voltage Drop for plate current of 2 mA

    10 V

    Published in approved 6KM8 target datasheet entry; Section1

Capacitance

  • Grid No.l to Cathode, Heater, Grid No.2, and Internal Shield

    5.5 pF

    Published in approved 6KM8 target datasheet entry; Section1

  • Plate No.lA to Cathode, Heater, Grid No.2, and Internal Shield

    1.2 pF

    Published in approved 6KM8 target datasheet entry; Section1

  • Plate No.lB to Cathode, Heater, Grid No.2, and Internal Shield

    1.3 pF

    Published in approved 6KM8 target datasheet entry; Section1

  • Plate No.2 to Cathode, Heater, Grid No.2, and Internal Shield

    1.8 pF

    Published in approved 6KM8 target datasheet entry; Section1

  • Tetrode Plate No.lA to Diode Plate

    0.18 pF

    Published in approved 6KM8 target datasheet entry; Section1

  • Tetrode Plate No.lB to Diode Plate

    0.024 pF

    Published in approved 6KM8 target datasheet entry; Section1

  • Tetrode Plate No.2 to Diode Plate

    0.013 pF

    Published in approved 6KM8 target datasheet entry; Section1

Characteristic

  • Plate Voltage

    100 V

    Published in approved 6KM8 target datasheet entry; Section1

  • Grid-No.2 Voltage

    100 V

    Published in approved 6KM8 target datasheet entry; Section1

  • Grid-No.l Supply Voltage

    0 V

    Published in approved 6KM8 target datasheet entry; Section1

  • Grid-No.l Resistor (Bypassed)

    2.2 MΩ

    Published in approved 6KM8 target datasheet entry; Section1

  • Plate Resistance (Approx.)

    30000 Ω

    Published in approved 6KM8 target datasheet entry; Section1

  • Transconductance

    3400 µS

    Published in approved 6KM8 target datasheet entry; Section1

  • Plate Current

    4.2 mA

    Published in approved 6KM8 target datasheet entry; Section1

  • Grid-No.2 Current

    1.7 mA

    Published in approved 6KM8 target datasheet entry; Section1

SECTION 2

Tetrode

Other

  • Heater Voltage (ac/dc)

    6.3 V

    Published in approved 6KM8 target datasheet entry; Section2

  • Heater Current

    300 mA

    Published in approved 6KM8 target datasheet entry; Section2

  • Plate Voltage

    100 V

    Published in approved 6KM8 target datasheet entry; Section2

  • Grid-No.l Supply Voltage

    0 V

    Published in approved 6KM8 target datasheet entry; Section2

  • Grid-No.l Resistor (Bypassed)

    2.2 MΩ

    Published in approved 6KM8 target datasheet entry; Section2

  • Transconductance

    4500 µS

    Published in approved 6KM8 target datasheet entry; Section2

  • Plate Current

    6.6 mA

    Published in approved 6KM8 target datasheet entry; Section2

  • Plate Voltage 100 100

    100 V

    Published in approved 6KM8 target datasheet entry; Section2

  • Grid-No.2 Voltage 100 100

    100 V

    Published in approved 6KM8 target datasheet entry; Section2

  • Grid-No.l Supply Voltage 0 0

    0 V

    Published in approved 6KM8 target datasheet entry; Section2

  • Grid-No.l Resistor (Bypassed) 2.2 2.2

    2.2 MΩ

    Published in approved 6KM8 target datasheet entry; Section2

  • Transconductance 2000 2000

    1800 µS

    Published in approved 6KM8 target datasheet entry; Section2

  • Plate Resistance (Approx.) 0.1 0.1

    0.12 MΩ

    Published in approved 6KM8 target datasheet entry; Section2

  • Plate Current 2.3 2.3

    2.1 mA

    Published in approved 6KM8 target datasheet entry; Section2

  • Grid-No.2 Current 3.8 3.8

    3.3 mA

    Published in approved 6KM8 target datasheet entry; Section2

  • Plate Voltage (Each plate)

    330 V

    Published in approved 6KM8 target datasheet entry; Section2

  • Grid-No.2 (Screen-Grid) Supply Voltage

    330 V

    Published in approved 6KM8 target datasheet entry; Section2

  • Positive-bias value

    0 V

    Published in approved 6KM8 target datasheet entry; Section2

  • Negative-bias value

    50 V

    Published in approved 6KM8 target datasheet entry; Section2

  • Plate Dissipation (Each plate)

    1 W

    Published in approved 6KM8 target datasheet entry; Section2

  • For grid-No.2 voltages up to

    165 V

    Published in approved 6KM8 target datasheet entry; Section2

  • For grid-No.2 voltages up to 165 volts

    0.65 W

    Published in approved 6KM8 target datasheet entry; Section2

  • For grid-No.2 voltages between 165 and

    330 V

    Published in approved 6KM8 target datasheet entry; Section2

  • Grid-No.l-Circuit Resistance, for grid-No.l-resistor-bias operation

    2.2 MΩ

    Published in approved 6KM8 target datasheet entry; Section2

  • Plate Current

    1 mA

    Published in approved 6KM8 target datasheet entry; Section2

  • Tube Voltage Drop for plate current of

    2 mA

    Published in approved 6KM8 target datasheet entry; Section2

  • Tube Voltage Drop for plate current of 2 mA

    10 V

    Published in approved 6KM8 target datasheet entry; Section2

Capacitance

  • Grid No.l to Cathode, Heater, Grid No.2, and Internal Shield

    5.5 pF

    Published in approved 6KM8 target datasheet entry; Section2

  • Plate No.lA to Cathode, Heater, Grid No.2, and Internal Shield

    1.2 pF

    Published in approved 6KM8 target datasheet entry; Section2

  • Plate No.lB to Cathode, Heater, Grid No.2, and Internal Shield

    1.3 pF

    Published in approved 6KM8 target datasheet entry; Section2

  • Plate No.2 to Cathode, Heater, Grid No.2, and Internal Shield

    1.8 pF

    Published in approved 6KM8 target datasheet entry; Section2

  • Tetrode Plate No.lA to Diode Plate

    0.18 pF

    Published in approved 6KM8 target datasheet entry; Section2

  • Tetrode Plate No.lB to Diode Plate

    0.024 pF

    Published in approved 6KM8 target datasheet entry; Section2

  • Tetrode Plate No.2 to Diode Plate

    0.013 pF

    Published in approved 6KM8 target datasheet entry; Section2

Characteristic

  • Plate Voltage

    100 V

    Published in approved 6KM8 target datasheet entry; Section2

  • Grid-No.2 Voltage

    100 V

    Published in approved 6KM8 target datasheet entry; Section2

  • Grid-No.l Supply Voltage

    0 V

    Published in approved 6KM8 target datasheet entry; Section2

  • Grid-No.l Resistor (Bypassed)

    2.2 MΩ

    Published in approved 6KM8 target datasheet entry; Section2

  • Plate Resistance (Approx.)

    30000 Ω

    Published in approved 6KM8 target datasheet entry; Section2

  • Transconductance

    3400 µS

    Published in approved 6KM8 target datasheet entry; Section2

  • Plate Current

    4.2 mA

    Published in approved 6KM8 target datasheet entry; Section2

  • Grid-No.2 Current

    1.7 mA

    Published in approved 6KM8 target datasheet entry; Section2