6AC7W

Premium RCA sharp-cutoff pentode designed for military and critical industrial applications. It combines high-performance fixed-gain amplification with special-quality construction for equipment requiring increased reliability.

Directly heatedCold cathodeCommon cathodeDissimilar

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

Description

The RCA 6AC7W is a premium sharp-cutoff pentode for military and critical industrial applications.

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

Published maximum ratings and representative operating characteristics 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

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 02

1960 RCA Industrial and Communications Types

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

Heater Voltage
6.3 V