Data set 01
1951 Mullard Valve and Service Manual
Published operating points and test conditions from this source.
SECTION 1
Pentode
Application
Application
Television amplifier or mixer
Voltage Pentode - High Frequency (single) ·Pentode
EF80
High-frequency pentode widely used for wideband RF, IF, and television video amplification.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- B9A
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 6.3 V / 300 mA
Description
High-frequency pentode for wideband, RF, IF, and television video-amplifier service.
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
- B9A
- Socket code
- B9A
- Base pins
- 9
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 300 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
B9A - 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
- 650000 Ω
- Transconductance
- 0.0068 S
- Amplification factor
- 50
- Max plate voltage
- 300 V
- Max screen voltage
- 300 V
- Max plate dissipation
- 2.5 W
- Max screen dissipation
- 0.7 W
- Max cathode current
- 15 mA
Promoted ratings and characteristics are taken from the printed target-tube entry in the approved PDF.
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
1951 Philips Receiving Tubes for Television
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristics
Anode Voltage
170 V
Screen Voltage
170 V
Anode Current
10 mA
Transconductance
7400 uS
AnodeVoltage=170V
Anode Voltage
250 V
Screen Voltage
250 V
Anode Current
10 mA
Transconductance
6800 uS
AnodeVoltage=250V
Data set 03
1953 La Radiotechnique
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
300 mA
Nominal
Maximum Plate Voltage
300 V
Maximum Screen Voltage
300 V
Maximum Plate Dissipation
2.5 W
Characteristic
Transconductance
7400 µS
Typical
Data set 04
1953 RFT Rundfunk Technik
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
300 mA
Nominal
Maximum Plate Voltage
300 V
Maximum Screen Voltage
300 V
Maximum Plate Dissipation
2.5 W
Maximum Screen Dissipation
0.5 W
Maximum Cathode Current
25 mA
Characteristic
Transconductance
7400 µS
Typical
Data set 05
1958 Brimar Radio Valve No 7
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristic
Heater Voltage
6.3 V
Heater Current
300 mA
Data set 06
195X Tesla
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
300 mA
Nominal
Maximum Plate Voltage
250 V
Maximum Screen Voltage
250 V
Maximum Plate Dissipation
2.5 W
Characteristic
Transconductance
7400 µS
Typical
Data set 07
1961 Ferranti Technical Handbook
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristics
Plate voltage
170 V
Point1
Screen-grid voltage
170 V
Point1
Control-grid voltage
-2 V
Point1
Plate current
10 mA
Point1
Screen-grid current
2.5 mA
Point1
Transconductance
7400 uS
Point1
Plate resistance
400000 Ohm
Point1
Screen-to-control-grid amplification factor
50 ratio
Point1
Data set 08
1963 Amperex Condensed
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Plate voltage
250 V
RFIFVideoAmplifier
Screen voltage
250 V
RFIFVideoAmplifier
Control-grid voltage
-3.5 V
RFIFVideoAmplifier
Plate current
10 mA
RFIFVideoAmplifier
Screen current
2.8 mA
RFIFVideoAmplifier
Characteristic
Plate resistance
65000 Ω
Section1
Transconductance
6500 µS
Section1
Amplification factor
50
Section1
Data set 09
1963 Philips Electron Tubes Handbook V1a
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristic
Heater voltage
6.3 V
Published heater rating
Heater current
300 mA
Published heater rating
Transconductance
6800 µS
RFAmplifier
Other
Plate voltage
250 V
RFAmplifier
Screen voltage
250 V
RFAmplifier
Grid bias
-3.5 V
RFAmplifier
Plate current
10 mA
RFAmplifier
Screen current
2.8 mA
RFAmplifier
Data set 10
1967 Mullard Receiving and Amplifying Valves
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Cl n ig l ) 7
0 pF
Published in approved EF80 target datasheet entry; Section1
C1!l(g2 )
5.4 pF
Published in approved EF80 target datasheet entry; Section1
P g2 max
700 mW
Published in approved EF80 target datasheet entry; Section1
h, max
15 mA
Published in approved EF80 target datasheet entry; Section1
Characteristic
gill
7.4 mA
Published in approved EF80 target datasheet entry; Section1
Data set 11
1968 Mazda Belvu
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
300 mA
Nominal
Maximum Plate Voltage
300 V
Maximum Screen Voltage
300 V
Maximum Plate Dissipation
2.5 W
Maximum Screen Dissipation
0.5 W
Maximum Cathode Current
25 mA
Characteristic
Transconductance
7400 µS
Typical
Data set 12
1972 Philips Receiving Tubes
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
300 mA
Nominal
Maximum Plate Voltage
300 V
Maximum Screen Voltage
300 V
Maximum Plate Dissipation
2.5 W
Maximum Screen Dissipation
0.7 W
Maximum Cathode Current
25 mA
Characteristic
Transconductance
7400 µS
Typical
Data set 13
1973 Mazda Valves Binder 2
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Heater Voltage Vh
63 V
Heater Current Ih
3 A
Maximum Anode Dissipation pa(max)
25 W
Maximum Screen Grid Dissipation pg2(max)
7 W
Maximum Anode Voltage Va(max)
300 V
Maximum Screen Grid Voltage Vg2(max)
300 V
Maximum Heater to Cathode Voltage (R.M.S.) Vh-k(r.m,$)max
150 V
Maximum Cathode Current Ik(max)
15 mA
Data set 14
1981 Russian Tubes Katsnelson and Larionov
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristic
Heater voltage
6.3 V
Published nominal/basic-parameter heater condition.
Heater current
300 mA
Published heater current.
Plate current
10 mA
Published basic-parameter operating point.
Screen current
2.8 mA
Published basic-parameter operating point.
Transconductance
6800 µS
Published basic-parameter value; normalized to µS.
Plate resistance
650000 Ω
Published internal/plate resistance.
Amplification factor
50
Published amplification factor.
Other
Maximum plate voltage
300 V
Published limiting operating value.
Data set 15
1999 Philips E-Z
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Heater voltage
6.3 V
Heating
Heater current
300 mA
Heating
Maximum plate voltage
300 V
Promoted published datasheet value
Maximum screen voltage
300 V
Promoted published datasheet value
Maximum screen dissipation
0.9 W
Promoted published datasheet value
Characteristic
Plate resistance
500000 Ω
Promoted published datasheet value
Transconductance
7400 µS
Promoted published datasheet value
Amplification factor
50
Promoted published datasheet value