6AB5

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: 6R
Socket code: -
Base pins: 6
Nominal heater: 6.3 V / 150 mA

Description

Triode indicator tube using a fluorescent target to provide a visible indication for tuning or similar level-display service.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 6R
Socket code: -
Base pins: 6
Nominal heater voltage: 6.3 V
Nominal heater current: 150 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

Max plate voltage: 135 V

Published promoted fields populated from the datasheet; identical repeated sections compressed where applicable.

Section 2

Tuning Indicator

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this 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

Target voltage maximum
135 V
TuningIndicator
Plate supply voltage
135 V
TuningIndicator
Target voltage
135 V
TuningIndicator
Plate resistor
0.25 MΩ
TuningIndicator
Target current
4.5 mA
TuningIndicator
Plate current
0.5 mA
ZeroBias
Grid bias
-7.5 V
Shadow0Degrees
Grid bias
0 V
Shadow90Degrees

Data set 02

1938 Raytheon

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Heater Voltage
643 V
Heater Voltage 643 volts
Heater Current
150 mA
Heater Current 0.15 amp
Maximum Plate Supply Voltage
135 V
Maximum Plate Supply Voltage 135 volts
Maximum Target Voltage
135 V
Maximum Target Voltage 135 volts
Target Voltage
135 V
Target Voltage 135 volts
Plate Supply Voltage
135 V
Plate Supply Voltage 135 volts
Plate Resistor
0.25 MΩ
Plate Resistor 0.25 megohm
Target Current (Approximate)
4.5 mA
Target Current (Approximate) 4,5 ma,
Plate Current (Zero Bias )
0.5 mA
Plate Current (Zero Bias ) 0.5 ma

Data set 03

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Target voltage maximum
180 V
TuningIndicator
Target voltage minimum
125 V
TuningIndicator
Plate voltage
135 V
TuningIndicator
Target voltage
135 V
TuningIndicator
Grid voltage
-10 V
Shadow0Degrees
Grid voltage
0 V
Shadow90Degrees
Plate current
0.5 mA
Shadow90Degrees
Target current
2 mA
TuningIndicator