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1J5G

Directly heated battery power pentode capable of roughly 0.45 W Class-A audio output from approximately 135 V.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 6X
Socket code: IO
Base pins: 7
Nominal heater: 2 V / 120 mA

Description

1J5G is listed as a power-amplifier pentode in the supplied receiving-tube handbook. It uses a 2.0 V, 0.12 A directly heated filament. The handbook publishes maximum ratings and representative operating characteristics for its intended service.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 6X
Socket code: IO
Base pins: 7
Nominal heater voltage: 2 V
Nominal heater current: 120 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

6X - 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

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 105300 Ω
Transconductance: 0.00095 S
Amplification factor: 100
Max plate voltage: 135 V
Max screen voltage: 135 V

Reference/equivalence-style source: ratings and characteristics stated identical with type 950; external 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 Ken Rad

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Screen Voltage
135 V
Screen Voltage 135 Volts Max.
Grid Voltage
-16.5 V
Grid Voltage -16.5 Volts
Plate Current
4 mA
Plate Current 7.0 ¥4lliamperes
Screen Current
2 mA
Screen Current 2.0 Milliamperes
Mutual Conductance
950 µS
Mutual Conductance 950 Micromhos
Load Resistance
13500 ohm
Load Resistance 13,500 Ohms
Power Output
0.45 W
Power Output 0.45 Watt
Amplification Factor
100 ratio
Amplification Factor 100

Data set 02

1937 Raytheon Radio Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

R — lNaximum Plate Voltage
135 V
Published ratings
Maximum Screen Voltage
135 V
Published ratings
Plate Voltage
135 V
ClassA
Screen Voltage
1356 V
ClassA
Amplification Factor
100
ClassA
Plate Resistance
0.1 Mohm
ClassA
Transconductance
1000 uS
ClassA
Plate Current
7 mA
ClassA
Screen Current
2 mA
ClassA
Load Resistance
13500 ohm
ClassA
Power Output
0.45 W
ClassA
Maximum Signal Voltage (RMS
11.7 V
ClassA

Data set 03

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Filament Voltage
2 V
Filament Current
120 mA

Characteristic

Equivalent Type
950

Data set 04

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Maximum plate voltage
135 V
Published handbook rating
Maximum screen voltage
135 V
Published handbook rating
Plate voltage
135 V
ClassA
Screen voltage
135 V
ClassA
Control-grid voltage
16.5 V
ClassA
Plate current
7 mA
ClassA
Screen current
2 mA
ClassA
Load resistance
135000 ohm
ClassA
Power output
0.45 W
ClassA

Characteristic

Plate resistance
105300 ohm
Published handbook characteristic
Transconductance
950 µS
Published handbook characteristic
Filament voltage
2 V
DirectlyHeated DC filament
Filament current
120 mA
DirectlyHeated DC filament

Data set 05

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

Transconductance
950 uS
PublishedOnReferenceSheet