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Tuning Indicator ·TuningIndicator

6AF6G

Cathode-ray tuning indicator with two independently controlled shadow angles on a circular fluorescent screen.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 7AG
Socket code: IO
Base pins: 8
Nominal heater: 6.3 V / 150 mA

Description

Cathode-ray tuning indicator with two independently controlled shadow angles on a circular fluorescent screen.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 7AG
Socket code: IO
Base pins: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 150 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

7AG - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1IS	A	IS — Internal Screen Original EIA source label IS; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 128, 7AG
PIN2H	—	H — Heater Original EIA source label H; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 128, 7AG
PIN32G1	B	G1 — Control Grid Original EIA source label 2G1; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 128, 7AG
PIN41G1	A	G1 — Control Grid Original EIA source label 1G1; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 128, 7AG
PIN5T	A	T — Target Original EIA source label T; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 128, 7AG
PIN7H	—	H — Heater Original EIA source label H; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 128, 7AG
PIN8K	A	K — Cathode Original EIA source label K; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 128, 7AG

Section ratings

1 physical section, each with unique specifications.

Section 1

Tuning Indicator

X-ray radiationInterelectrode capacitances

Max plate voltage: 135 V
Max cathode current: 2 mA

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

1940 RCA

Published operating points and test conditions from this source.

SECTION 1

Tuning Indicator

Other

HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
150 mA
Nominal
Maximum Plate Voltage
250 V
Maximum Cathode Current
2 mA

Characteristic

IndicatorSections
2
Twin visual indicators

Data set 02

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Tuning Indicator

Other

Target voltage maximum
250 V
TuningIndicator
Target voltage minimum
125 V
TuningIndicator
Target voltage
250 V
TuningIndicator;Shadow=0deg

Characteristic

Ray-control voltage range
4-155 V
Shadow=0deg
Ray-control voltage
0 V
Shadow=100deg
Target current
3.75 mA
Shadow=100deg

Data set 03

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Tuning Indicator

Other

Target Voltage
135 V

Characteristic

Target Current
1.5 mA
TargetVoltage=135V
RayControlElectrodeVoltage
81 V
ZeroDegreeShadowAngle

Data set 04

1966 Tung Sol Electronic Tubes 1 of 4

Published operating points and test conditions from this source.

SECTION 1

Tuning Indicator

Other

Target voltage maximum
135 V
TuningIndicator
Target voltage minimum
90 V
TuningIndicator
Ray-control electrode supply voltage maximum
135 V
TuningIndicator
Target voltage
100 V
TuningIndicator
Target current
0.9 mA
TuningIndicator;100VTarget
Target voltage
135 V
TuningIndicator
Target current
1.5 mA
TuningIndicator;135VTarget
Display
Two independent circular shadow angles
Section1

Characteristic

Ray-control electrode voltage for zero shadow
60 V
TuningIndicator;100VTarget
Ray-control electrode voltage for zero shadow
81 V
TuningIndicator;135VTarget