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Voltage Radio Detector Converter ·Diode-Pentode

6CR6

Detector diode combined with a remote-cutoff pentode for audio amplification with AVC control, improving receiver automatic-volume-control performance.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: 7EA
Socket code: B7G
Base pins: 9
Nominal heater: 6.3 V / 300 mA

Description

The 6CR6 combines a detector diode with a remote-cutoff pentode on a common cathode. The pentode is intended for audio-amplifier service with AVC applied to the control grid to improve overall receiver automatic-volume-control performance.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 7EA
Socket code: B7G
Base pins: 9
Nominal heater voltage: 6.3 V
Nominal heater current: 300 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

7EA - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN11G3	A	G3 — Suppressor GridGroup 7EA1 Chart transcription; independent verification pending	Unverified EIA Base Connections, printed page 129, 7EA
PIN1K	A	K — CathodeGroup 7EA1 Chart transcription; independent verification pending	Unverified EIA Base Connections, printed page 129, 7EA
PIN22P	B	P — Plate (Anode) Chart transcription; independent verification pending	Unverified EIA Base Connections, printed page 129, 7EA
PIN3H	—	H — Heater Chart transcription; independent verification pending	Unverified EIA Base Connections, printed page 129, 7EA
PIN4H	—	H — Heater Chart transcription; independent verification pending	Unverified EIA Base Connections, printed page 129, 7EA
PIN51P	A	P — Plate (Anode) Chart transcription; independent verification pending	Unverified EIA Base Connections, printed page 129, 7EA
PIN61G2	A	G2 — Screen Grid Chart transcription; independent verification pending	Unverified EIA Base Connections, printed page 129, 7EA
PIN71G1	A	G1 — Control Grid Chart transcription; independent verification pending	Unverified EIA Base Connections, printed page 129, 7EA

Section ratings

2 physical sections, each with unique specifications.

Section 1

Diode

X-ray radiationInterelectrode capacitances

Max cathode current: 2 mA
Rectifier max heater-cathode voltage: 100 V

Published promoted fields populated from printed headings.

Section 2

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 200000 Ω
Transconductance: 0.00195 S
Max plate voltage: 300 V
Max screen voltage: 150 V
Max plate dissipation: 2.5 W
Max screen dissipation: 0.3 W
Rectifier max heater-cathode voltage: 100 V

Published promoted fields populated from printed headings.

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 2

Pentode

Other

Plate voltage
250 V
ClassA
Screen-grid voltage
100 V
ClassA
Grid voltage
-2 V
ClassA
Plate current
9.5 mA
ClassA
Screen-grid current
3 mA
ClassA

Data set 02

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 2

Pentode

Characteristic

PentodeTransconductance
1950 uS
Section2

Data set 03

1966 Tung Sol Electronic Tubes 2 of 4

Published operating points and test conditions from this source.

SECTION 1

Diode

Characteristic

Average diode current at 10 V DC applied
2 mA

SECTION 2

Pentode

Other

Plate voltage
250 V
ClassA
Screen voltage
100 V
ClassA
Control-grid voltage
-2 V
ClassA

Characteristic

Plate current
9.5 mA
ClassA
Screen current
3 mA
ClassA