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6AL7GT

Electron-ray indicator designed especially for precise visual tuning of AM/FM radio receivers.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: B8-6
Socket code: IO
Base pins: 8
Nominal heater: 6.3 V / 150 mA

Description

The 6AL7-GT is an electron-ray indicator designed especially for AM-FM receivers, allowing precise tuning without additional tubes or circuit components.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: B8-6
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

B8-6 - 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

Tuning Indicator

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Electron-ray indicator section. Target-voltage and deflection data retained as parameters.

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

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Tuning Indicator

Other

Plate voltage
315 V
ClassA
Control-grid bias
0 V
ClassA
Maximum target voltage
365 V
FM/AM Tuning Indicator
Minimum target voltage
220 V
FM/AM Tuning Indicator
Typical target voltage
315 V
FM/AM Tuning Indicator
Cathode resistor
3300 ohm
FM/AM Tuning Indicator

Characteristic

Heater voltage
6.3 V
Published heater rating
Heater current
150 mA
Published heater rating

Data set 02

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Tuning Indicator

Other

HeaterOrFilamentVoltageNominal
6.3 V
HeaterOrFilamentCurrentNominal
150 mA
Maximum Target Voltage
365 V
IndicatorService
TypicalTargetVoltage
315 V
IndicatorService
Cathode Bias Resistance
3300 Ohm
IndicatorService

Characteristic

DeflectionSensitivityFirstMillimeter
1 mm/V
IndicatorService
GridVoltageForFluorescenceCutoff
-7 V
IndicatorService