Data set 01
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Heater voltage
4.7 V
Heater current
600 mA
SECTION 2
Pentode
Other
Heater voltage
4.7 V
Heater current
600 mA
Voltage Radio Detector Converter ·Pentode-Triode
5EU8
Triode-pentode designed for television oscillator and mixer service.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- -
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 4.7 V / 600 mA
Description
5EU8 is described in the supplied Tung-Sol datasheet as a triode-pentode for television oscillator/mixer service. The redo includes a substantive section-electrical extraction from ratings and characteristic tables.
Socket description
Small-button Noval 9-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- B9A
- Base pins
- 9
- Nominal heater voltage
- 4.7 V
- Nominal heater current
- 600 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
2 physical sections, each with unique specifications.
Section 1
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 6500 Ω
- Transconductance
- 0.006 S
- Amplification factor
- 40
- Max plate voltage
- 330 V
- Max plate dissipation
- 3 W
Referenced ratings not printed in this source; not inferred.
Section 2
Pentode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 600000 Ω
- Transconductance
- 0.0052 S
- Max plate voltage
- 330 V
- Max screen voltage
- 330 V
- Max plate dissipation
- 3.1 W
- Max screen dissipation
- 0.55 W
Referenced ratings not printed in this source; not inferred.
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
1966 Tung Sol Electronic Tubes 1 of 4
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristic
Heater/filament voltage
4.7 V
Published rating
Heater/filament current
600 mA
Published rating
Triode transconductance
8500 µS
TriodeSection
Triode amplification factor
40
TriodeSection
Triode plate resistance
5000 ohm
TriodeSection
Pentode transconductance
6400 µS
PentodeSection
Pentode plate resistance
80000 ohm
PentodeSection
Other
Application
Combined triode oscillator and pentode mixer
TelevisionService
Electrical equivalence
6EU8 except heater characteristics
Published statement
Triode plate voltage
150 V
TriodeSection
Triode plate current
18 mA
TriodeSection
Pentode plate voltage
125 V
PentodeSection
Pentode screen voltage
125 V
PentodeSection
Pentode grid voltage
-1 V
PentodeSection
Pentode plate current
12 mA
PentodeSection
Pentode screen current
4 mA
PentodeSection
Data set 03
1968 General Electric Co
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristic
Heater Warmup Time
11 s
Data set 04
1971 RCA HB3 Binder 4 of 7
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Plate voltage
150 V
Triode;ClassA
Plate current
13 mA
Triode;ClassA
Heater/filament voltage
4.7 V
DerivativeSheet
Heater/filament current
600 mA
DerivativeSheet
Cathode warm-up time
35 s
PublishedDerivativeSheet
Characteristic
Plate resistance
6500 ohm
Triode
Transconductance
6000 uS
Triode
Amplification factor
40
Triode
Capacitance
Grid-to-plate capacitance
1.8 pF
Triode
SECTION 2
Pentode
Other
Plate voltage
150 V
Pentode;ClassA
Screen voltage
150 V
Pentode;ClassA
Plate current
10 mA
Pentode;ClassA
Screen current
3 mA
Pentode;ClassA
Characteristic
Plate resistance
600000 ohm
Pentode
Transconductance
5200 uS
Pentode
Capacitance
Grid-to-plate capacitance
0.01 pF
Pentode
Input capacitance
5.5 pF
Pentode
Output capacitance
3.2 pF
Pentode