6872

Reliable semi-remote-cutoff pentode designed for controlled-gain RF or AGC amplifier service in severe airborne or guided-missile environments.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: SUBMINIATURE7
Base pins: 7
Nominal heater: 6.3 V / 200 mA

Description

Reliable semi-remote-cutoff subminiature pentode for AGC amplifier service in mobile and airborne equipment. Electrical ratings, characteristics, operating data, and special environmental information were extracted from the supplied source.

Socket description

Subminiature 7-lead base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: SUBMINIATURE7
Base pins: 7
Nominal heater voltage: 6.3 V
Nominal heater current: 200 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

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

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 340000 Ω
Transconductance: 0.0041 S
Max plate voltage: 165 V
Max screen voltage: 155 V
Max plate dissipation: 1 W
Max screen dissipation: 0.4 W
Max cathode current: 20 mA

Published maximum ratings and typical characteristics promoted from the approved source; 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

1938 Raytheon

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
200 mA
Nominal
Maximum Plate Voltage
165 V
Maximum Screen Voltage
155 V
Maximum Plate Dissipation
1.1 W
Maximum Screen Dissipation
0.4 W
Maximum Cathode Current
20 mA

Characteristic

Transconductance
4100 µS
Typical
Plate Resistance
340000 ohm
Typical

Data set 02

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Heater voltage
6.3 V
Nominal
Heater current
200 mA
Nominal
Plate voltage
165 V
Published operating table; OperatingPoint1
Plate voltage
120 V
Published operating table; OperatingPoint1

Characteristic

Transconductance
4100 uS
Published operating table; OperatingPoint1

Data set 03

1966 Tung Sol Electronic Tubes 4 of 4

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

LIMITS OF APPLIED VOLTAGE — published value 1
6.3 V
Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.
LIMITS OF APPLIED VOLTAGE — published value 2
0.6 V
Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.
PLATE VOLTAGE
165 V
Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.
GRID 1 VOLTAGE
-55 V
Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.
GRID 2 VOLTAGE
155 V
Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.
GRID 3 VOLTAGE
0 V
Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.
PLATE DISSIPATION
1.1 W
Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.
GRID 2 DISSIPATION
0.4 W
Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.
CATHODE CURRENT
16.5 mA
Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.
GRID 1 CIRCUIT RESISTANCE
1.2
Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.
TEMPERATURE AT HOTTEST POINT ON BULB
1220 C
Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.
PLATE VOLTAGE
120 V
Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.
GRID 1 VOLTAGE
0 V
Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.
GRID 2 VOLTAGE
120 V
Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.
CATHODE BIAS RESISTOR
200 ohm
Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.
PLATE CURRENT
7.75 mA
Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.
GRID 2 CURRENT
2.7 mA
Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.
TRANSCONDUCTANCE
4100 uS
Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.
PLATE RESISTANCE
0.34 ohm
Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.
ALTITUDE RATING
60000 ft
Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.
Plate resistance
340000 ohm
Promoted section value from the supplied datasheet.
Transconductance
0.0041 A/V
Promoted section value from the supplied datasheet.

Other

MAXIMUM HEATER-CATHODE VOLTAGE:
200 V
Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.
Maximum plate voltage
165 V
Promoted section value from the supplied datasheet.
Maximum screen voltage
155 V
Promoted section value from the supplied datasheet.
Maximum plate dissipation
1.1 W
Promoted section value from the supplied datasheet.
Maximum screen dissipation
0.4 W
Promoted section value from the supplied datasheet.