Alternatives & variations Download PDF datasheet

Tuning Indicator ·Triode-TuningIndicator

6E5

Classic glass electron-ray tuning indicator combining a triode control section with a fluorescent variable-shadow display for accurate receiver tuning.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: 6R
Socket code: UX6
Base pins: 6
Nominal heater: 6.3 V / 300 mA

Description

Glass electron-ray tube used to indicate the effects of a changing control voltage, especially for accurate radio-receiver tuning.

Socket description

Small 6-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 6R
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

6R - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1H	—	H — Heater EIA chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 127, 6R
PIN2D	A	OTHER — Other Identified Element Source D denotes deflecting electrode; generic OTHER element 40 pending canonical refinement	Unverified EIA Base Connections, printed page 127, 6R
PIN3G1	A	G1 — Control Grid EIA chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 127, 6R
PIN4T	A	T — Target EIA chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 127, 6R
PIN5K	A	K — Cathode EIA chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 127, 6R
PIN7H	—	H — Heater EIA chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 127, 6R

Section ratings

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 1000000 Ω
Transconductance: 0.00025 S
Amplification factor: 20
Max plate voltage: 250 V
Max plate dissipation: 0.5 W
Max cathode current: 5 mA

Internal control-amplifier triode section.

Section 2

Tuning Indicator

X-ray radiationInterelectrode capacitances

Max plate voltage: 250 V
Max plate dissipation: 1 W
Max cathode current: 5 mA

Circular fluorescent target indicator section.

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

ilaximum Plate Supply Voltage
250 V
Published table
ximum Target Voltage
250 V
Published table
nimum Target Voltage
90 V
Published table
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
250 V
ClassA; Column3
Plate Resistor
0.5 ohm
ClassA; Column1
Plate Resistor
1 ohm
ClassA; Column2
Plate Resistor
1 ohm
ClassA; Column3
Target Current (approx.)
4.5 mA
ClassA; Column1
Target Current (approx.)
4.5 mA
ClassA; Column2
Target Current (approx.)
4.5 mA
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

Data set 02

1940 RCA

Published operating points and test conditions from this source.

SECTION 2

Tuning Indicator

Other

HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
200 mA
Nominal
Maximum Plate Voltage
250 V
Maximum Cathode Current
0.24 mA

Characteristic

TriodePlateCurrent
0.24 mA
Zero triode-grid voltage

Data set 03

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate Supply Voltage
250 V
Triode unit
Plate Current
0.24 mA
250 V plate supply

SECTION 2

Tuning Indicator

Other

Target Supply Voltage
250 V
Target Current
4 mA
Approximate; 250 V target

Characteristic

Grid Voltage for Zero-Degree Shadow
-8 V
Approximate

Data set 04

1953 RFT Rundfunk Technik

Published operating points and test conditions from this source.

SECTION 2

Tuning Indicator

Other

HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
300 mA
Nominal
Maximum Plate Voltage
250 V

Data set 05

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 2

Tuning Indicator

Other

Maximum target voltage
250 V
TuningIndicator
Minimum target voltage
125 V
TuningIndicator
Plate supply voltage
250 V
Through1Megohm
Target voltage
250 V
Control-grid voltage for 0-degree shadow
-8 V
ShadowAngle0Degrees
Control-grid voltage for 90-degree shadow
0 V
ShadowAngle90Degrees
Plate current
0.24 mA
Grid0V
Target current
4 mA
Grid0V

Data set 06

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Maximum Plate Supply Voltage
250 V
Plate And Target Supply Voltage
200 V
SeriesTriodePlateResistor
1 Mohm

Characteristic

TriodePlateCurrent
0.19 mA
GridVoltage=0V;Supply=200V

SECTION 2

Tuning Indicator

Other

Maximum Target Voltage
250 V
Minimum Target Voltage
100 V

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
200 V
TuningIndicator
Triode plate current
0.19 mA
TuningIndicator
Grid bias for 0 degree shadow angle
-6.5 V
TuningIndicator

SECTION 2

Tuning Indicator

Other

Maximum target voltage
250 V
IndicatorTarget
Minimum target voltage
125 V
IndicatorTarget
Target current
3 mA
PlateAndTargetSupply=200V

Data set 08

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Heater voltage
6.3 V
Heater current
300 mA
Triode plate voltage
250 V
Triode
Triode grid voltage
-3.5 V
Triode
Triode plate current
0.5 mA
Triode
Target voltage
250 V
Indicator
Target current
4 mA
Indicator
Target current maximum
5 mA
Indicator
Plate voltage maximum
250 V
Triode
Target voltage maximum
250 V
Indicator

Characteristic

Grid voltage for shadow closure
-8 V
Indicator
Display color
Green
ElectronRay

SECTION 2

Tuning Indicator

Other

Target voltage
250 V
Indicator
Target current
4 mA
Indicator

Application

Display function
Electron-ray shadow indication
TuningIndicator

Data set 09

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 2

Tuning Indicator

Other

Plate-Supply Voltage Maximum
250 V
TuningIndicator
Target Voltage Maximum
250 V
TuningIndicator
Target Voltage Minimum
125 V
TuningIndicator
Plate and Target Supply Voltage
250 V
TuningIndicator
Series Triode-Plate Resistor
1 megohm
TuningIndicator
Target Current
4 mA
TuningIndicator
Triode-Plate Current
0.24 mA
TuningIndicator

Characteristic

Triode-Grid Voltage for 0 Degree Shadow
-8 V
TuningIndicator