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7868

Beam-power audio-output tube widely used in high-fidelity amplifiers, providing substantial Class-AB output from a compact nine-pin envelope.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 9RW
Socket code: B9E
Base pins: 9
Nominal heater: 6.3 V / 800 mA

Description

Novar power pentode for output stages of high-fidelity audio amplifiers and radio receivers.

Socket description

Novar 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 9RW
Socket code: B9E
Base pins: 9
Nominal heater voltage: 6.3 V
Nominal heater current: 800 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

9RW - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Beam Power

X-ray radiationInterelectrode capacitances

Plate resistance: 29000 Ω
Transconductance: 0.0102 S
Max plate voltage: 550 V
Max screen voltage: 450 V
Max plate dissipation: 19 W
Max screen dissipation: 4 W
Max cathode current: 90 mA

Published 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

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

Heater Voltage
6.3 V
Nominal published value
Heater Current
800 mA
Nominal published value

Data set 02

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Characteristic

Heater Voltage
6.3 V
Heater Current
900 mA
Plate Resistance Approximate
29000 ohm
Transconductance
10200 uS

Other

Heater Voltage Minimum
5.7 V
Heater Voltage Maximum
6.9 V
HeaterCathodeVoltageMaximum
200 V
HeaterNegative
HeaterCathodeDCVoltageMaximum
100 V
HeaterPositive
Plate Voltage Maximum
550 V
Screen Voltage Maximum
440 V
Plate Dissipation Maximum
19 W
Screen Dissipation Maximum
3.3 W
Cathode Current Maximum
90 mA
GridCircuitResistanceMaximum
0.3 Mohm
FixedBias
GridCircuitResistanceMaximum
1 Mohm
SelfBias
Plate Voltage
300 V
ClassA
Screen Voltage
300 V
ClassA
Grid Voltage
-10 V
ClassA
Plate Current
60 mA
ClassA
Load Resistance
3000 ohm
ClassA
Power Output
11 W
ClassA
Plate Voltage
450 V
TwoTubes;PushPull;ClassAB
Screen Voltage
400 V
TwoTubes;PushPull;ClassAB
Load Resistance Plate To Plate
10000 ohm
TwoTubes;PushPull;ClassAB
Power Output
28 W
TwoTubes;PushPull;ClassAB

Data set 03

1971 RCA HB3 Binder 5 of 7

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

Heater voltage nominal
6.3 V
Heater current nominal
800 mA
Plate Voltage
550 V
Published source row
Grid-No
2 V
Published source row
Grid-No (value 2)
440 V
Published source row
Cathode Current
90 mA
Published source row
Grid-No
2 W
Published source row
Grid-No (value 2)
3 W
Published source row
Grid-No (value 3)
3 W
Published source row
Plate Dissipation
19 W
Published source row
Plate Voltage
300 V
Published source row
Grid-No
2 V
Published source row
Grid-No (value 2)
300 V
Published source row
Grid-No.l (Control-Grid) Voltage
-10 V
Published source row
Peak AF Grid-No.l Voltage
10 V
Published source row
Max. -Signal Plate Current
75 mA
Published source row
Zero-Signal Grid-No
2 mA
Published source row
Zero-Signal Grid-No (value 2)
8 mA
Published source row
Max. -Signal Grid-No
2 mA
Published source row
Max. -Signal Grid-No (value 2)
15 mA
Published source row
Plate Resistance (Approx.)
29000 ohm
Published source row
Transconductance
10200 µS
Published source row
Effective Load Resistance
3000 ohm
Published source row
Total Harmonic Distortion
13 %
Published source row
Max.-Signal Power Output
11 W
Published source row
Plate Voltage
550 V
Published source row
Grid-No
2 V
Published source row
Grid-No (value 2)
440 V
Published source row
Cathode Current
90 mA
Published source row
Grid-No
2 W
Published source row
Grid-No (value 2)
3.3 W
Published source row
Plate Dissipation
19 W
Published source row
Voltage
300 V
Published source row
Voltage (value 2)
350 V
Published source row
Voltage (value 3)
400 V
Published source row
Grid-No
2
Published source row
Voltage
300 V
Published source row
Voltage (value 2)
350 V
Published source row
Voltage (value 3)
350 V
Published source row
Grid-No.l Voltage
-12.5 V
Published source row
Grid-No.l Voltage (value 2)
-15.5 V
Published source row
Grid-No.l Voltage (value 3)
-16 V
Published source row
to-Grid-No
1
Published source row
Voltage
25 V
Published source row
Voltage (value 2)
31 V
Published source row
Voltage (value 3)
32 V
Published source row
Current
74 mA
Published source row
Current (value 2)
72 mA
Published source row
Current (value 3)
64 mA
Published source row
Current
116 mA
Published source row
Current (value 2)
130 mA
Published source row
Current (value 3)
135 mA
Published source row
No
2 mA
Published source row
No (value 2)
10 mA
Published source row
No (value 3)
9.5 mA
Published source row
No
2 mA
Published source row
No (value 2)
28 mA
Published source row

Characteristics

Voltage (.AC or DC)
6.3 V
Published source row
Voltage (.AC or DC) (value 2)
0.6 V
Published source row
Current at heater volts =
6.3 V
Published source row
Current at heater volts = (value 2)
0.8 V
Published source row

Capacitance

v olcage oI ei Cher the grid No
2
Published source row

Data set 04

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

Peak Heater-Cathode Voltage
200 V
AbsoluteValue
Average Heater-Cathode Voltage
100 V
AbsoluteValue
Typical Plate Voltage
300 V
ClassA
Typical Screen Voltage
300 V
ClassA
Grid No.1 Voltage
-10 V
ClassA
Zero-Signal Plate Current
60 mA
ClassA
Maximum-Signal Plate Current
75 mA
ClassA
Maximum-Signal Screen Current
15 mA
ClassA
Load Resistance
3000 ohm
ClassA

Characteristic

Plate Resistance
20000 ohm
ClassA
Transconductance
10200 uS
ClassA