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Voltage Pentode - Sharp Cutoff (single) ·Pentode

6AC7

High-transconductance sharp-cutoff pentode designed for wide-band voltage amplification. Its substantial transconductance and fixed-control characteristic suit broadband RF, IF, and video-frequency signal stages.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 8N
Socket code: IO
Base pins: 8
Nominal heater: 6.3 V / 450 mA

Description

High-transconductance sharp-cutoff pentode for wide-band voltage amplification.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 8N
Socket code: IO
Base pins: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 450 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

8N - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1SH	A	SH — Internal Shield EIA transcription; independent manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8N
PIN2H	—	H — Heater EIA transcription; independent manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8N
PIN3G3	A	G3 — Suppressor Grid EIA transcription; independent manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8N
PIN4G1	A	G1 — Control Grid EIA transcription; independent manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8N
PIN5K	A	K — Cathode EIA transcription; independent manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8N
PIN6G2	A	G2 — Screen Grid EIA transcription; independent manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8N
PIN7H	—	H — Heater EIA transcription; independent manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8N
PIN8P	A	P — Plate (Anode) EIA transcription; independent manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8N

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 1000000 Ω
Transconductance: 0.009 S
Max plate voltage: 300 V
Max screen voltage: 150 V
Max plate dissipation: 3 W
Max screen dissipation: 0.38 W
Max cathode current: 25 mA
Rectifier max heater-cathode voltage: 90 V

Published promoted fields populated from the datasheet; identical repeated sections compressed where applicable.

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

Pentode

Characteristic

Plate Resistance
750000 ohm
Transconductance
9000 µS
Amplification Factor
6750

Other

Maximum Plate Voltage
300 V
Maximum Screen Voltage
300 V
Typical Plate Current
10 mA
Typical Screen Current
2.5 mA

Data set 02

1953 RFT Rundfunk Technik

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
450 mA
Nominal
Maximum Plate Voltage
330 V
Maximum Screen Voltage
165 V
Maximum Plate Dissipation
3.3 W
Maximum Screen Dissipation
0.45 W
Maximum Cathode Current
40 mA

Characteristic

Transconductance
9000 µS
Typical
Plate Resistance
750000 ohm
Typical

Data set 03

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Maximum plate voltage
300 V
Published handbook rating
Maximum screen voltage
150 V
Published handbook rating
Plate voltage
300 V
ClassA
Screen voltage
150 V
ClassA
Control-grid bias
0 V
ClassA
Plate current
10 mA
ClassA
Screen current
2.5 mA
ClassA

Characteristic

Plate resistance
1000000 ohm
Published handbook characteristic
Transconductance
9000 µS
Published handbook characteristic
Heater/filament voltage
6.3 V
Published heater/filament rating
Heater/filament current
450 mA
Published heater/filament rating

Data set 04

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

Transconductance
9000 uS
Typical

Other

Heater Voltage
6.3 V

Data set 05

1966 Tung Sol Electronic Tubes 1 of 4

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Plate voltage
300 V
ClassA;Condition1
Screen supply voltage
150 V
ClassA;Condition1
Cathode resistor minimum
100 Ω
ClassA;Condition1
Plate current
10 mA
ClassA;Condition1
Screen current
1.5 mA
ClassA;Condition1
Plate voltage
300 V
ClassA;Condition2
Screen supply voltage
300 V
ClassA;Condition2
Screen series resistor
60000 Ω
ClassA;Condition2
Cathode resistor minimum
160 Ω
ClassA;Condition2
Application
High-transconductance sharp-cutoff voltage amplifier
Section1

Characteristic

Plate resistance
1 MΩ
Section1
Transconductance
9000 µS
Section1

Data set 06

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

HeaterOrFilamentVoltageNominal
6.3 V
HeaterOrFilamentCurrentNominal
450 mA
Maximum Plate Voltage
300 V
Maximum Screen Voltage
150 V
Maximum Plate Dissipation
3 W
Maximum Screen Dissipation
0.38 W

Characteristic

Plate Resistance
1000000 Ohm
Transconductance
9000 uS