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Power - Tetrode (NOT beam) ·Tetrode

46

Directly heated dual-grid power-amplifier tetrode designed especially for Class-B audio-output service. Its filamentary construction provides substantial low-frequency power in push-pull amplifier stages.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
5C
Socket code
UX5
Base pins
5
Nominal heater
2.5 V / 1.75 A

Description

Directly heated dual-grid power-amplifier tube intended especially for Class B audio-output service.

Socket description

Small 5-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
5C
Socket code
UX5
Base pins
5
Nominal heater voltage
2.5 V
Nominal heater current
1.75 A
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

5C - 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

Tetrode

X-ray radiationInterelectrode capacitances
Plate resistance
2380 Ω
Transconductance
0.00235 S
Amplification factor
5.6
Max plate voltage
400 V
Max plate dissipation
10 W
Max cathode current
200 mA

Published ratings and characteristics promoted where applicable.

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

Tetrode

Other

  • Plate Voltage

    250 V

    ClassA;Grid2AndPlateTied

  • Grid Voltage

    -13 V

    ClassA;Grid2AndPlateTied

  • Plate Current

    22 mA

    ClassA;Grid2AndPlateTied

  • Load Resistance

    6400 ohm

    ClassA

  • Power Output

    1.25 W

    ClassA

Data set 02

193X Cunningham

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristics

  • Heater/filament voltage

    2.5 V

    Published nominal

  • Heater/filament current

    1.75 A

    Published nominal

  • Transconductance

    2350 uS

    Published characteristic

  • Amplification factor

    5.6

    Published characteristic

  • Plate resistance

    2400 Ohm

    Published characteristic

Data set 03

1940 RCA

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

  • HeaterVoltageNominal

    2.5 V

    Nominal

  • HeaterCurrentNominal

    1.75 A

    Nominal

  • Maximum Plate Voltage

    400 V

  • Maximum Plate Dissipation

    10 W

  • Maximum Cathode Current

    200 mA

Characteristic

  • Transconductance

    2350 µS

    Typical

  • Amplification Factor

    5.6

    Typical

  • Plate Resistance

    2380 ohm

    Typical

Data set 04

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristic

  • Transconductance

    2350 µS

Other

  • Operating Mode

    Class B push-pull

Data set 05

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

  • Plate Voltage

    250 V

    ClassA;Grid2AndPlateTied

  • Grid Voltage

    -13 V

    ClassA;Grid2AndPlateTied

  • Plate Current

    22 mA

    ClassA;Grid2AndPlateTied

  • Load Resistance

    6400 ohm

    ClassA

  • Power Output

    1.25 W

    ClassA

Data set 06

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

  • Power Output

    20 W

    ClassB;TwoTubes;PlateVoltage=400V