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Voltage Pentode - Sharp Cutoff (single) ·Pentode

5840

Subminiature sharp-cutoff pentode designed for high-frequency circuits and on-off electronic control applications.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 8DL
Socket code: B8D
Base pins: 8
Nominal heater: 6.3 V / 150 mA

Description

Sharp-cutoff 8-pin subminiature pentode designed for high-frequency circuits and on-off control applications, with an internal suppressor-grid connection.

Socket description

Subminiature 8-lead

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 8DL
Socket code: B8D
Base pins: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 150 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

8DL - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1G1	A	G1 — Control Grid EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL
PIN2G3	A	G3 — Suppressor GridGroup 8DL2 EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL
PIN2K	A	K — CathodeGroup 8DL2 EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL
PIN3H	—	H — Heater EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL
PIN4G3	A	G3 — Suppressor GridGroup 8DL4 EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL
PIN4K	A	K — CathodeGroup 8DL4 EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL
PIN5P	A	P — Plate (Anode) EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL
PIN6H	—	H — Heater EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL
PIN7G2	A	G2 — Screen Grid EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL
PIN8G3	A	G3 — Suppressor GridGroup 8DL8 EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL
PIN8K	A	K — CathodeGroup 8DL8 EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 260000 Ω
Transconductance: 0.005 S
Max plate voltage: 165 V
Max screen voltage: 155 V
Max plate dissipation: 1.1 W
Max screen dissipation: 0.55 W
Max cathode current: 20 mA

Published promoted fields populated semantically; identical repeated sections compressed.

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
150 mA
Nominal
Maximum Plate Voltage
165 V
Maximum Plate Dissipation
0.85 W
Maximum Cathode Current
20 mA

Characteristic

Transconductance
5000 µS
Typical
Plate Resistance
175000 ohm
Typical

Data set 02

1940 RCA

Published operating points and test conditions from this source.

SECTION 1

Pentode

Application

Application
BroadBand_RF_IF_Amplifier text

Data set 03

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

Plate Resistance
260000 ohm
Transconductance
5000 µS

Other

Maximum Plate Voltage
165 V
Maximum Screen Voltage
155 V
Maximum Plate Dissipation
1.1 W
Maximum Screen Dissipation
0.55 W
Maximum Cathode Current
16.5 mA
Plate Voltage
100 V
Screen Voltage
100 V
Plate Current
7.5 mA
Screen Current
2.4 mA

Data set 04

1958 Compagnie General

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

Heater Voltage
6.3 V
Heater Current
150 mA
Approximate Maximum RF Frequency
400 MHz
Grid-to-Plate Capacitance
0.03 pF
Maximum without shield
Input Capacitance
4 pF
Without shield
Output Capacitance
1.9 pF
Without shield

Data set 05

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Pentode

Capacitance

Input capacitance
4.2 pF
Section1
Output capacitance
3.4 pF
Section1
Grid-to-plate capacitance
0.015 pF
Section1

Other

Plate voltage
100 V
ClassA
Screen voltage
100 V
ClassA
Cathode resistor
150 Ω
ClassA
Plate current
7.5 mA
ClassA
Screen current
2.4 mA
ClassA

Characteristic

Plate resistance
260000 Ω
ClassA
Transconductance
5000 µS
ClassA

Data set 06

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Pentode

Capacitance

Grid To Plate Capacitance
0.015 pF
WithShield;Maximum
Input Capacitance
4.2 pF
WithShield
Output Capacitance
3.4 pF
WithShield

Data set 07

1966 Tung Sol Electronic Tubes 3 of 4

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Heater voltage
6.3 V
Heater current
150 mA
Heater-cathode voltage, either polarity
200 V
Plate current
7.5 mA
ClassA
Screen current
2.4 mA
ClassA
Maximum plate voltage
165 V
Maximum screen voltage
155 V
Maximum plate dissipation
1.1 W
Maximum screen dissipation
0.55 W
Maximum cathode current
16.5 mA

Capacitance

Grid1-to-plate capacitance maximum
0.03 pF
Input capacitance
4 pF
Output capacitance
1.9 pF

Data set 08

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Plate Voltage
100 V
ClassA
Screen Voltage
100 V
ClassA
Plate Current
7.5 mA
ClassA
Screen Current
2.4 mA
ClassA
Input Capacitance
4.2 pF
ClassA

Data set 09

1971 RCA HB3 Binder 3 of 7

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

Voltage — published value 1
6.3 V
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
Voltage — published value 2
5 V
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
Current
150 mA
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
Plate Supply Voltage
100 V
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
Grid-No.2 Supply Voltage
100 V
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
Plate Resistance
260000 ohm
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
Transconductance
5000
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
Plate Current
7.5 mA
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
Grid-No.2 Current
2.4 mA
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
current of 10 µamp — published value 1
10 V
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
current of 10 µamp — published value 2
-9 V
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
Heater Current — published value 1
1 A
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
Heater Current — published value 2
138 mA
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
Heater Current — published value 3
162 mA
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
Capacitance — published value 1
2
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
Capacitance — published value 2
0.015
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
Input Capacitance — published value 1
2
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
Input Capacitance — published value 2
3.5
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
Input Capacitance — published value 3
4.9
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
Output Capacitance — published value 1
2
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
Output Capacitance — published value 2
2.9
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
Output Capacitance — published value 3
3.9
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.

Other

Grid No.l to Plate — published value 1
0.015 mA
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
Grid No.l to Plate — published value 2
0.03 mA
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
DC PLATE VOLTAGE
165 V
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
GRID-No.2 (SCREEN) VOLTAGE
155 V
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
Negative bias value
55 V
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
PLATE D6SSIPATION — published value 1
1 mA
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
PLATE D6SSIPATION — published value 2
1 mA
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
GRID-No.2 INPUT — published value 1
0 mA
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
GRID-No.2 INPUT — published value 2
55 mA
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
DC CATHODE CURRENT
16.5 mA
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.
For cathode-bias operation
1.2 mA
Published datasheet value; multiple values on a source row represent separate source-table conditions or limits.

Data set 10

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

Heater voltage
6.3 V
Heater current
150 mA
Plate voltage
100 V
Screen voltage
100 V
Plate current
7.5 mA
Screen current
2.4 mA
Transconductance
5000 uS
Plate resistance
260000 ohm

Capacitance

Input capacitance
4.2 pF
Output capacitance
3.4 pF
Plate-grid capacitance maximum
0.015 pF