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Tuning Indicator ·Triode-TuningIndicator

6G5

Electron-ray visual indicator for receiver tuning or electrical level indication, using a fluorescent display whose pattern changes with control voltage.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
UX6
Base pins
6
Nominal heater
6.3 V / 300 mA

Description

Circular fluorescent tuning indicator with internally connected remote-cutoff triode amplifier; double-marked 6U5/6G5.

Socket description

Small 6-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
UX6
Base pins
6
Nominal heater voltage
6.3 V
Nominal heater current
300 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Max plate voltage
250 V
Max plate dissipation
1 W

Published ratings and characteristics promoted where clearly stated; identical repeated diode/triode sections compressed where applicable.

Section 2

Tuning Indicator

X-ray radiationInterelectrode capacitances
Max plate voltage
250 V

Physical section represented from published tube construction.

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

  • “ ‘g Laximum Plate Supply Voltage

    250 V

    ClassA

  • liaximum Target Voltage

    250 V

    ClassA

  • liinimum Target Voltage

    90 V

    ClassA

  • Plate Supply Voltage

    100 V

    ClassA; Column1

  • Plate Supply Voltage

    200 V

    ClassA; Column2

  • Plate Supply Voltage

    250 V

    ClassA; Column3

  • Target Voltage

    100 V

    ClassA; Column1

  • Target Voltage

    200 V

    ClassA; Column2

  • Target Voltage

    280 V

    ClassA; Column3

  • Plate Resistor

    0.5 ohm

    ClassA; Column1

  • Plate Resistor

    1 ohm

    ClassA; Column2

  • Plate Resistor

    1 ohm

    ClassA; Column3

  • Target Current (approximate)

    4.5

    ClassA; Column1

  • Target Current (approximate)

    4.5

    ClassA; Column2

  • Target Current (approximate)

    4.5

    ClassA; Column3

  • Plate Current (zero blas)

    0.19 mA

    ClassA; Column1

  • Plate Current (zero blas)

    0.19 mA

    ClassA; Column2

  • Plate Current (zero blas)

    0.24 mA

    ClassA; Column3

  • Grid Bias (approximate)

    -8 V

    ClassA; Column1

  • Grid Bias (approximate)

    -18.5 V

    ClassA; Column2

  • Grid Bias (approximate)

    22 V

    ClassA; Column3

Data set 02

1938 Raytheon

Published operating points and test conditions from this source.

SECTION 2

Tuning Indicator

Other

  • , l Heater Current

    300 mA

    , l Heater Current 0,3 amp

  • f Maxirmm Plate Supply Voltage

    2860 V

    f Maxirmm Plate Supply Voltage 2860 volts

  • J DU t»m Maximm Target Voltage

    250 V

    J DU t»m Maximm Target Voltage 250 volts

  • Plate Supply Voltage 100 200

    260 V

    Plate Supply Voltage 100 200 260 volts

  • Grid Blas (approximate) 0 0

    0 V

    Grid Blas (approximate) 0 0 0 volts

  • Heater voltage (&ac or dc), . e e o o s

    6.3 V

    Heater voltage (&ac or dc), . e e o o s 6,3 volts

  • Heater current , ., . . . . . ¢« « o o o

    300 mA

    Heater current , ., . . . . . ¢« « o o o 0,300ampere

  • v HeatGrVOlmge............... 6.3

    6.3 V

    v HeatGrVOlmge............... 6.3 6.3 volts

  • Series triode-plate resistor , . . . . . . 1

    1 MΩ

    Series triode-plate resistor , . . . . . . 1 1 megohm

Data set 03

1940 RCA

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Heater voltage

    6.3 V

    Published nominal value

  • Heater current

    300 mA

    Published nominal value

Other

  • Target voltage

    250 V

    Published maximum

  • Application

    Visual tuning indication

    Electron-ray indicator

Data set 04

1948 Brimar Radio Valve Manual

Published operating points and test conditions from this source.

SECTION 2

Tuning Indicator

Application

  • Service

    Visual tuning indication

Data set 05

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 2

Tuning Indicator

Characteristics

  • Triode plate current maximum

    0.24 mA

Other

  • Shadow-angle control grid voltage

    -22 V

Data set 06

1958 Brimar Radio Valve No 7

Published operating points and test conditions from this source.

SECTION 2

Tuning Indicator

Application

  • Application

    Visual tuning indication

Data set 07

1966 Tung Sol Electronic Tubes 2 of 4

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate and target supply voltage

    250 V

    Typical

  • Triode grid voltage for zero-degree shadow angle

    -22 V

    Typical;250V

  • Triode plate current at grid 0 V

    0.24 mA

    Typical;250V

SECTION 2

Tuning Indicator

Other

  • Maximum target voltage

    285 V

  • Minimum target voltage

    100 V

  • Target current at grid 0 V

    4 mA

    Typical;250V