Data set 01
1950 Sylvania
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristic
HeaterOrFilamentVoltage
6.3 V
HeaterOrFilamentCurrent
450 mA
Voltage Pentode ·Pentode
5639
Rugged premium subminiature pentode developed for broadband radar and video amplification in military, airborne, and industrial equipment.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- 8DL
- Socket code
- SUBMINIATURE8
- Base pins
- 8
- Nominal heater
- 6.3 V / 450 mA
Description
Ruggedized subminiature pentode for broadband radar and video-amplifier service.
Socket description
Subminiature 8-lead base
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- 8DL
- Socket code
- SUBMINIATURE8
- Base pins
- 8
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 450 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
- 50000 Ω
- Transconductance
- 0.009 S
- Max plate voltage
- 165 V
- Max screen voltage
- 155 V
- Max plate dissipation
- 4 W
- Max screen dissipation
- 1 W
- Max cathode current
- 40 mA
Premium ruggedized broadband pentode; maximum DC cathode current 40 mA.
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 02
1958 Compagnie General
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Plate Dissipation
3.5 W
Characteristic
Plate Resistance
50000 ohm
Transconductance
9000 uS
Data set 03
195X General Electric Essential Characteristics
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Plate Voltage
150 V
ClassA
Screen Voltage
100 V
ClassA
Cathode Resistor
100 ohm
ClassA
Plate Current
21 mA
ClassA
Screen Current
4 mA
ClassA
Capacitance
Input Capacitance
9.5 pF
Output Capacitance
7.5 pF
Grid-to-Plate Capacitance
0.1 pF
Data set 04
1960 RCA Industrial and Communications Types
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristics
Cutoff characteristic
Sharp cutoff
Application
Application
High-gain wide-band amplifier
Data set 05
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Heater voltage
6.3 V
Heater current
450 mA
Maximum altitude
60000 ft
Life expectancy
5000 h
30CAmbient
Power output
0.76 W
2VrmsSignal;9kLoad
Characteristic
Grid #4 voltage for 40 mA plate current
-14 V
Capacitance
Maximum grid #4-to-plate capacitance
0.18 pF
WithoutShield
Maximum grid #4-to-plate capacitance
0.13 pF
WithShield
Input capacitance rated
9 pF
Output capacitance rated
4.6 pF
WithoutShield
Output capacitance rated
8 pF
WithShield
Data set 06
1963 Philips Electron Tubes Handbook V1
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Plate voltage
150 V
Screen voltage
100 V
Cathode resistor
100 ohm
Plate voltage
150 V
ClassA; AFPowerAmplifier
Screen voltage
100 V
ClassA; AFPowerAmplifier
Load resistance
9 kOhm
ClassA; AFPowerAmplifier
Power output
1 W
ClassA; AFPowerAmplifier
Characteristic
Plate current
14 to 28 mA
NewTubeRange
Screen current
2 to 6 mA
NewTubeRange
Transconductance
7500 to 10500 uS
Plate resistance
50 kOhm
Capacitance
Control-grid capacitance
8 to 10 pF
Anode capacitance
7 to 9 pF
Anode-to-grid capacitance
- to 0.13 pF
Maximum
Data set 07
1963 Philips Electron Tubes Handbook V3
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristic
Plate voltage
150 V
Section1
Screen voltage
100 V
Section1
Cathode resistor
100 Ω
Section1
Plate current
21 mA
Section1
Screen current
4 mA
Section1
Transconductance
9000 µS
Section1
Plate resistance
50000 Ω
Section1
Cutoff grid voltage
-14 V
Section1
Transconductance variation after 1000 hours maximum
20 %
LifeTest
Other
Shock/vibration service
Special quality
Section1
Application
Output pentode and video amplifier
Section1
Data set 08
1966 Tung Sol Electronic Tubes 3 of 4
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Plate voltage
150 V
Typical
Grid #2 voltage
100 V
Typical
Cathode resistor
100 ohm
Typical
Plate current
21 mA
Typical
Grid #2 current
4 mA
Typical
Maximum heater-cathode voltage
200 V
Characteristic
Transconductance
9000 uS
Typical
Plate resistance
50000 ohm
Typical
Grid #1 voltage at 10 uA plate current
-14 V
Capacitance
Input capacitance
9 pF
Output capacitance
8 pF
Data set 09
1999 Philips 0-D
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristics
Typical plate voltage
150 V
Typical screen voltage
100 V
Typical cathode resistor
100 ohm
Typical plate current
21 mA
Typical screen current
4 mA
Transconductance
9000 uS
Plate resistance
50 kohm
Capacitance
Input capacitance
9 pF
Output capacitance
8 pF
Plate-grid capacitance
0.13 pF
Maximum
Other
Audio load resistance
9 kohm
ClassA
Audio input voltage
2 V
ClassA
Audio output power
1 W
ClassA
Maximum plate voltage
165 V
Maximum screen voltage
155 V
Maximum plate dissipation
4 W
Maximum screen dissipation
1 W
Maximum cathode current
40 mA
Maximum heater-cathode voltage
200 V