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6AC5G

High-mu power triode for positive-grid Class A resistance-coupled amplification and Class B audio output. Its unusual positive-grid operating mode permits dynamic coupling from a driver tube, providing useful output without a conventional driver arrangement.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 8
Socket code: IO
Base pins: 8
Nominal heater: 6.3 V / 400 mA

Description

Power triode intended for Class-A resistance-coupled power amplification and Class-B power-amplifier service.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 8
Socket code: IO
Base pins: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 400 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

8 - 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

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 36700 Ω
Transconductance: 0.0034 S
Amplification factor: 125
Max plate voltage: 250 V
Max plate dissipation: 10 W
Max cathode current: 110 mA

Class A positive-grid power amplifier section.

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

1937 Raytheon Radio Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate voltage
250 V
ClassA
Control-grid voltage
13 V
ClassA;PositiveBias
Plate current
32 mA
ClassA
Grid current
5 mA
ClassA
Load resistance
7000 Ω
ClassA;DirectOrDynamicCoupled
Power output
3.7 W
ClassA;DirectOrDynamicCoupled
Load resistance plate-to-plate
10000 Ω
ClassB;TwoTubes
Power output
8 W
ClassB;TwoTubes

Characteristic

Plate resistance
36700 Ω
Section1
Transconductance
3400 µS
Section1
Amplification factor
125
Section1

Data set 02

1938 Triadyne

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate Current
32 mA
ClassA;DynamicCoupled
Grid Current
5 mA
ClassA;DynamicCoupled
Load Resistance
7000 ohm
ClassA;DynamicCoupled
RatedPowerOutput
3.7 W
ClassA;DynamicCoupled

Data set 03

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Maximum Plate Voltage
250 V
Maximum Plate Dissipation
10 W