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Voltage - Triode (single) ·Triode

76

General-purpose triode for amplifier and detector service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
6A
Socket code
UX5
Base pins
5
Nominal heater
6.3 V / 300 mA

Description

General-purpose triode amplifier and detector.

Socket description

Small 5-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
6A
Socket code
UX5
Base pins
5
Nominal heater voltage
6.3 V
Nominal heater current
300 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

6A - 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
9500 Ω
Transconductance
0.00145 S
Amplification factor
13.8
Max plate voltage
250 V

Published ratings and characteristics mapped semantically; identical repeated sections compressed.

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

Capacitance

  • Grid-to-plate capacitance

    2.8 pF

    Section1

  • Input capacitance

    3.5 pF

    Section1

  • Output capacitance

    2.5 pF

    Section1

Other

  • Plate voltage

    100 V

    ClassA

  • Control-grid voltage

    -5 V

    ClassA

  • Plate current

    2.5 mA

    ClassA

  • Plate voltage

    250 V

    ClassA

  • Control-grid voltage

    -13.5 V

    ClassA

  • Plate current

    3 mA

    ClassA

  • Plate voltage

    100 V

    BiasedDetector

  • Plate voltage

    250 V

    BiasedDetector

  • Plate current

    0.2 mA

    BiasedDetector;NoSignal

  • Plate voltage

    45 V

    GridLeakDetector

  • Grid leak resistance minimum

    1 MΩ

    GridLeakDetector

  • Grid leak resistance maximum

    5 MΩ

    GridLeakDetector

  • Grid condenser

    0.00025 µF

    GridLeakDetector

Characteristic

  • Plate resistance

    12000 Ω

    100VPlate

  • Transconductance

    1150 µS

    100VPlate

  • Amplification factor

    13.8

    Section1

  • Plate resistance

    9500 Ω

    250VPlate

  • Transconductance

    1450 µS

    250VPlate

Data set 02

1940 RCA

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Heater or filament voltage

    6.3 V

    Published nominal value

  • Heater or filament current

    300 mA

    Published nominal/aggregate value

  • Transconductance

    1450 µS

    Published operating characteristic

  • Amplification factor

    13.8

    Published operating characteristic

Capacitance

  • Grid-to-plate capacitance

    2.8 pF

    Published

  • Grid-to-cathode capacitance

    3.5 pF

    Published

  • Plate-to-cathode capacitance

    2.5 pF

    Published

Data set 03

1948 Brimar Radio Valve Manual

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Anode Voltage

    250 V

  • Anode Current

    5 mA

  • Control Grid Voltage

    -13.5 V

  • Grid to Anode Capacitance

    2.2 pF

  • Grid to Cathode Capacitance

    3.4 pF

  • Anode to Cathode Capacitance

    5.5 pF

Data set 04

1958 Brimar Radio Valve No 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Heater Voltage

    6.3 V

  • Heater Current

    300 mA

  • GridToAnodeCapacitance

    2.2 pF

  • Grid To Cathode Capacitance

    3.4 pF

Data set 05

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Maximum plate voltage

    250 V

    Published handbook rating

  • Plate voltage

    250 V

    ClassA

  • Control-grid bias

    13.5 V

    ClassA

  • Plate current

    5 mA

    ClassA

Characteristic

  • Plate resistance

    9500 ohm

    Published handbook characteristic

  • Transconductance

    1450 µS

    Published handbook characteristic

  • Amplification factor

    13.8

    Published handbook characteristic

  • Heater voltage

    6.3 V

    Published heater rating

  • Heater current

    300 mA

    Published heater rating

Data set 06

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate Voltage

    250 V

    ClassA1

Capacitance

  • Grid To Cathode Capacitance

    3.6 pF

  • Plate To Cathode Capacitance

    2.6 pF

  • Grid To Plate Capacitance

    2.8 pF