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Power - Pentode (NOT beam) ·Pentode

950

Two-volt directly heated battery power pentode equivalent to 1J5G, providing approximately 0.45 W audio output.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
5K
Socket code
B5
Base pins
5
Nominal heater
2 V / 120 mA

Description

Two-volt power pentode. The French Sylvania sheet states that Type 950 is equivalent to Type 1J5G and refers to that type for operating characteristics and applications.

Socket description

European 5-pin base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
5K
Socket code
B5
Base pins
5
Nominal heater voltage
2 V
Nominal heater current
120 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

5K - 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
Max plate voltage
135 V
Max screen voltage
135 V

Published sheet states ratings are identical to 1U5G but does not print their numeric maxima; they were not inferred.

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

Pentode

Other

  • 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

    13500 Ω

    ClassA

  • Power output

    450 mW

    ClassA

  • Maximum signal voltage RMS

    11.7 V

    ClassA

Characteristic

  • Plate resistance

    100000 Ω

    ClassA

  • Transconductance

    1000 µS

    ClassA

  • Amplification factor

    100

    ClassA

Data set 02

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

    1J5G

Data set 03

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 bias

    16.5 V

    ClassA

  • Plate current

    7 mA

    ClassA

  • Screen current

    2 mA

    ClassA

  • Load resistance

    13500 ohm

    ClassA

  • Power output

    0.45 W

    ClassA

Characteristic

  • Plate resistance

    105300 ohm

    Published handbook characteristic

  • Heater/filament voltage

    2 V

    Published heater/filament rating

  • Heater/filament current

    120 mA

    Published heater/filament rating

Data set 04

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Heater voltage

    2 V

  • Heater current

    120 mA

  • Plate voltage

    135 V

    ClassA1

  • Screen voltage

    135 V

    ClassA1

  • Plate current

    7 mA

    ClassA1

  • Screen current

    2 mA

    ClassA1

  • Load resistance

    13500 ohm

    ClassA1

  • Power output

    0.45 W

    ClassA1