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Voltage Pentode - Sharp Cutoff (single) ·Pentode

6AS6W

Ruggedized dual-control sharp-cutoff pentode for converter, modulator, gating, and AF/IF/RF amplification in military and industrial equipment. Its broad control applications outweigh any single radio-converter role.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 7CM
Socket code: B7G
Base pins: 7
Nominal heater: 6.3 V / 175 mA

Description

Ruggedized sharp-cutoff dual-control pentode voltage amplifier with a separately connected suppressor grid for converter, modulator, gating, AF, IF and RF applications in military and industrial airborne equipment.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 7CM
Socket code: B7G
Base pins: 7
Nominal heater voltage: 6.3 V
Nominal heater current: 175 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

7CM - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1G1	A	G1 — Control Grid EIA chart transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CM
PIN2K	A	K — Cathode EIA chart transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CM
PIN3H	—	H — Heater EIA chart transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CM
PIN4H	—	H — Heater EIA chart transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CM
PIN5P	A	P — Plate (Anode) EIA chart transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CM
PIN6G2	A	G2 — Screen Grid EIA chart transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CM
PIN7G3	A	G3 — Suppressor GridGroup 7CM7 EIA chart transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CM
PIN7IS	A	IS — Internal ScreenGroup 7CM7 EIA chart transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CM

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 110000 Ω
Transconductance: 0.005 S
Max plate voltage: 200 V
Max screen voltage: 155 V
Max plate dissipation: 1.65 W
Max screen dissipation: 0.55 W
Max cathode current: 20 mA

Promoted from the printed maximum-rating/characteristic columns; operating points retained as section 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

1958 Compagnie General

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

Grid 1 Transconductance
3200 uS
Grid 3 Transconductance
470 uS
Application
Frequency converter / variable gain / modulator / gate

Other

Plate Dissipation
1.65 W

Data set 02

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Plate voltage
120 V
ClassA Ec3=0V
Screen voltage
120 V
ClassA Ec3=0V
Plate current
5.2 mA
ClassA Ec3=0V
Plate current
3.6 mA
ClassA Ec3=-3V

Data set 03

195X Raytheon Special Purpose Tubes

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Control-grid voltage
-2 V
MixerGatedAmplifier
Plate voltage
120 V
MixerGatedAmplifier
Screen voltage
120 V
MixerGatedAmplifier
Suppressor-grid voltage
0 V
MixerGatedAmplifier
Plate current
5.2 mA
MixerGatedAmplifier
Screen current
3.5 mA
MixerGatedAmplifier

Characteristic

Transconductance
3200 µS
Section1

Data set 04

1966 Tung Sol Electronic Tubes 3 of 4

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

Transconductance
0.005 A/V
PromotedValue
6.3 VOLTS — published value 1
6.3 VOLTS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
6.3 VOLTS — published value 2
0.175 VOLTS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
THE 57z5/6AS6W/6187 IS A RUGGEDIZED, SHARP CUT-OFF PENTODE VOLTAGE AM — published value 1
6
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
THE 57z5/6AS6W/6187 IS A RUGGEDIZED, SHARP CUT-OFF PENTODE VOLTAGE AM — published value 2
6187
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
HEATER VOLTAGE — published value 1
6.3 VOLTS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
HEATER VOLTAGE — published value 2
1 VOLTS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
N AXIMUM DC CATHODE CURRENT A
20 mA
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
HEATER VOLTAGE
6.3 VOLTS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
HEATER CURRENT
0.175 AMP
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
PLATE VOLTAGE
12 VOLTS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
GRID #3 VOLTAGE
3 VOLTS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
GRID #2 VOLTAGE — published value 1
2 VOLTS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
GRID #2 VOLTAGE — published value 2
12 VOLTS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
GRID #1 VOLTAGE — published value 1
1 VOLTS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
GRID #1 VOLTAGE — published value 2
-2 VOLTS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
PLATE CURRENT
5.2 mA
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
GRID #2 CURRENT — published value 1
2 mA
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
GRID #2 CURRENT — published value 2
3.5 mA
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
HEATER CURRENT — published value 1
160 mA
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
HEATER CURRENT — published value 2
190 mA
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
GR 10 CURRENT (i)
10
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
PLATE CURRENT (i) — published value 1
4.2
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
PLATE CURRENT (i) — published value 2
6.2
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
PLATE CURRENT (2)
2
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

Other

Maximum plate voltage
200 V
PromotedValue
Maximum screen voltage
155 V
PromotedValue
Maximum plate dissipation
1.65 W
PromotedValue
Maximum screen dissipation
0.55 W
PromotedValue
MAXIMUM DC GRID #2 VOLTAGE — published value 1
2 VOLTS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
MAXIMUM DC GRID #2 VOLTAGE — published value 2
155 VOLTS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
MAXIMUM DC GRID #3 VOLTAGE — published value 1
3 VOLTS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
MAXIMUM DC GRID #3 VOLTAGE — published value 2
3 VOLTS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
MAXIMUM PLATE DISSIPATION
1.65 WATTS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
MAXIMUM GRID #2 DISSIPATION — published value 1
2 WATT
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
MAXIMUM GRID #2 DISSIPATION — published value 2
0.55 WATT
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
MAXIMUM HEATER CATHODE 40LTAGE — published value 1
40 VOLTS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
MAXIMUM HEATER CATHODE 40LTAGE — published value 2
1 VOLTS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
MAXIMUM BULB TEMPERATURE
41
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.