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1H4G

Directly heated medium-mu power triode for Class A and push-pull Class B audio-output service in battery-operated equipment.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 5S
Socket code: IO
Base pins: 7
Nominal heater: 2 V / 60 mA

Description

Directly heated medium-mu triode for Class A and push-pull 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: 5S
Socket code: IO
Base pins: 7
Nominal heater voltage: 2 V
Nominal heater current: 60 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

5S - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1IS	A	IS — Internal Screen EIA chart transcription; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 127, 5S
PIN2F	—	F — Filament EIA chart transcription; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 127, 5S
PIN3P	A	P — Plate (Anode) EIA chart transcription; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 127, 5S
PIN5G1	A	G1 — Control Grid EIA chart transcription; manufacturer corroboration pending; preserve source designation G1	Unverified EIA Base Connections, printed page 127, 5S
PIN7F	—	F — Filament EIA chart transcription; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 127, 5S

Section ratings

1 physical section, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 10300 Ω
Transconductance: 0.0009 S
Amplification factor: 9.3
Max plate voltage: 180 V

Source states ratings/characteristics except capacitances identical with type 30 but does not reproduce maximum-ratings table; external maximum values not imported.

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

OCTAL BASE Maximum Plate Voltage
180 V
Published ratings
Plate Voltage
90 V
ClassA; Column1
Plate Voltage
135 V
ClassA; Column2
Plate Voltage
180 V
ClassA; Column3
Amplification Factor Fe3
9.3
ClassA; Column1
Amplification Factor Fe3
9.3
ClassA; Column2
Plate Resistance
11000 ohm
ClassA; Column1
Plate Resistance
10300 ohm
ClassA; Column2
Plate Resistance
10300 ohm
ClassA; Column3
Transconductance
850 uS
ClassA; Column1
Transconductance
900 uS
ClassA; Column2
Transconductance
900 uS
ClassA; Column3
Plate Current
245 mA
ClassA; Column1
Plate Current
3 mA
ClassA; Column2
Plate Current
3.1 mA
ClassA; Column3
Maximum Plate Voltage
180 V
ClassB
Maximum Pesk Plate Current (per tube
50 mA
ClassB
Maximum Io-Signal Plate Current (per tube
1.5 mA
ClassB
With average power input =
260 mW
ClassB

Capacitance

Grid to Plate &
5
Published capacitance
Input
3
Published capacitance
Output
3
Published capacitance

Data set 02

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Maximum plate voltage
180 V
Plate voltage
180 V
ClassA
Control-grid voltage
-13.5 V
ClassA
Plate current
3.1 mA
ClassA
Plate resistance
10300 Ohm
ClassA
Transconductance
900 uS
ClassA
Amplification factor
9.3
ClassA
Plate voltage
90 V
ClassA 90V
Control-grid voltage
-4.5 V
ClassA 90V
Plate current
2.5 mA
ClassA 90V
Plate resistance
11000 Ohm
ClassA 90V
Transconductance
850 uS
ClassA 90V
Amplification factor
9.3
ClassA 90V
Plate voltage
157.5 V
ClassB PushPull TwoTubes
Control-grid voltage
-15 V
ClassB PushPull TwoTubes
Plate current
1 mA
ClassB PushPull TwoTubes
Load resistance
8000 Ohm
ClassB PushPull TwoTubes
Power output
2.1 W
ClassB PushPull TwoTubes
Input signal power
0.26 W
ClassB PushPull TwoTubes

Data set 03

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate Voltage
180 V
ClassA1

Characteristic

Plate Current
3.1 mA
ClassA1;PlateVoltage=180V