6AR7GT

Double-diode remote-cutoff pentode combining radio detection and AVC rectification with gain-controlled receiver amplification. The variable-mu pentode supports smooth automatic gain control while the paired diodes provide detector functions.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 3
Base: 7DE
Socket code: IO
Base pins: 7
Nominal heater: 6.3 V / 300 mA

Description

Duo-diode pentode, remote cut-off type.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 7DE
Socket code: IO
Base pins: 7
Nominal heater voltage: 6.3 V
Nominal heater current: 300 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

7DE - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

3 physical sections, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Transconductance: 0.0025 S
Max plate voltage: 300 V
Max screen voltage: 100 V

Promoted values from 6AR7GT.pdf; section type follows printed electrode/function description.

Section 2

Diode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Promoted values from 6AR7GT.pdf; section type follows printed electrode/function description.

Section 3

Diode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Promoted values from 6AR7GT.pdf; section type follows printed electrode/function description.

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

1946 Amalgamated Wireless

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

Input capacitance
5 pF
Direct interelectrode capacitance
Output capacitance
9 pF
Direct interelectrode capacitance

Data set 02

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Plate voltage
250 V
ClassA
Screen voltage
100 V
ClassA
Control-grid voltage
-2 V
ClassA
Plate current
7 mA
ClassA
Screen current
1.8 mA
ClassA

SECTION 2

Diode

Other

Plate voltage
250 V
ClassA
Screen voltage
100 V
ClassA
Control-grid voltage
-2 V
ClassA
Plate current
7 mA
ClassA
Screen current
1.8 mA
ClassA