Data set 01
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 2
Pentode
Characteristic
PentodeTransconductance
9000 uS
Section2
Power - Pentode (NOT beam) ·Pentode-Triode
8GN8
Triode/pentode combination for television video, sound-IF, synchronization, and phase-inverter circuits.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- NOVAL
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 8 V / 450 mA
Description
High-mu triode and sharp-cutoff pentode for television sync, sound-IF, phase-inverter, and 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
- NOVAL
- Socket code
- B9A
- Base pins
- 9
- Nominal heater voltage
- 8 V
- Nominal heater current
- 450 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
NOVAL - 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
- 37000 Ω
- Transconductance
- 0.0027 S
- Amplification factor
- 100
- Max plate voltage
- 330 V
- Max plate dissipation
- 1 W
- Rectifier max heater-cathode voltage
- 200 V
- Rectifier warm-up time
- 11 s
Published promoted fields populated semantically; identical repeated sections compressed.
Section 2
Pentode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 60000 Ω
- Transconductance
- 0.0115 S
- Max plate voltage
- 330 V
- Max screen voltage
- 330 V
- Max plate dissipation
- 5 W
- Max screen dissipation
- 1.1 W
- Rectifier max heater-cathode voltage
- 200 V
- Rectifier warm-up time
- 11 s
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 02
1965 Sylvania Electronic Tubes Vol3
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristic
Heater voltage
8 V
Rated heater condition
Heater current
600 mA
Rated heater condition
Other
cuit with other tubes having a heater current rating of
600 mA
cuit with other tubes having a heater current rating of 600 ma„ hec}tt=`r voltage surges across individual tu}3es are
Voltage(acordc)
8 V
Voltage(acordc) .......... 6.3±10% 8.0 Volts Platevoltage ...... 330 330 max. Volts
Bulb
200 V
Bulb.................... ................ T-61/2 Plate Voltage . . . ` ...., 250 60 200 Volts
Grid 2 Voltage
150 V
Grid 2 Voltage ........ -- 150 150 Volts
SECTION 2
Pentode
Characteristic
Heater voltage
8 V
Rated heater condition
Heater current
600 mA
Rated heater condition
Data set 03
1966 Tung Sol Electronic Tubes 2 of 4
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Plate Voltage
250 V
Grid 1 Voltage
-2 V
Plate Current
2 mA
SECTION 2
Pentode
Other
Plate Voltage
200 V
Screen Voltage
150 V
Cathode Bias Resistor
100 ohm
Plate Current
25 mA
Screen Current
5.5 mA
Data set 04
1975 RCA RC30
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristic
Heater Warm-up Time (Average) —
11 s
Characteristic;PublishedValue1
Heater Warm-up Time (Average) —
11 s
Characteristic;PublishedValue2
Peak value
200 V
Characteristic;PublishedValue1
Peak value
200 V
Characteristic;PublishedValue2
Peak value
200 V
Characteristic;PublishedValue3
Average value
100 V
Characteristic;PublishedValue1
Average value
100 V
Characteristic;PublishedValue2
Average value
100 V
Characteristic;PublishedValue3
Plate Supply Voltage
250 V
Characteristic;PublishedValue1
Plate Supply Voltage
60 V
Characteristic;PublishedValue2
Plate Supply Voltage
200 V
Characteristic;PublishedValue3
Grid-No.l Voltage —
2 V
Characteristic;PublishedValue1
Grid-No.l Voltage —
0 V
Characteristic;PublishedValue2
Plate Resistance (Approx.)
37000 ohm
Characteristic;PublishedValue1
Plate Resistance (Approx.)
60000 ohm
Characteristic;PublishedValue2
Grid-No
2 mA
Characteristic;PublishedValue1
Grid-No
18 mA
Characteristic;PublishedValue2
Grid-No
5.5 mA
Characteristic;PublishedValue3
Grid Voltage (Approx.) for plate current of
20 V
Characteristic;PublishedValue1
Grid Voltage (Approx.) for plate current of
-5 V
Characteristic;PublishedValue2
Grid-No.l Voltage (Approx.) for plate current
100 uA
Characteristic;PublishedValue1
Grid-No.l Voltage (Approx.) for plate current
-10 uA
Characteristic;PublishedValue2
Plate Resistance
37000 ohm
Section1
Transconductance
2700 uS
Section1
Amplification Factor
100
Section1
Other
Plate Voltage
330 V
MaximumRating;PublishedValue1
Plate Voltage
330 V
MaximumRating;PublishedValue2
Grid-No
2 V
MaximumRating;PublishedValue1
Grid-No
330 V
MaximumRating;PublishedValue2
Grid-No.l (Control-Grid) Voltage, Positive-bias value
0 V
MaximumRating;PublishedValue1
Grid-No.l (Control-Grid) Voltage, Positive-bias value
0 V
MaximumRating;PublishedValue2
Plate Dissipation
1 W
MaximumRating;PublishedValue1
Plate Dissipation
5 W
MaximumRating;PublishedValue2
For grid-No
2 V
MaximumRating;PublishedValue1
For grid-No
165 V
MaximumRating;PublishedValue2
Published value
1.1 W
MaximumRating
For grid-No
2 V
MaximumRating;PublishedValue1
For grid-No
165 V
MaximumRating;PublishedValue2
For grid-No
330 V
MaximumRating;PublishedValue3
For grid-No
300 V
MaximumRating;PublishedValue4
For fixed-bias operation
0.5 megohm
MaximumCircuitValue;PublishedValue1
For fixed-bias operation
0.25 megohm
MaximumCircuitValue;PublishedValue2
For cathode-bias operation
1 megohm
MaximumCircuitValue;PublishedValue1
For cathode-bias operation
1 megohm
MaximumCircuitValue;PublishedValue2
Maximum Plate Voltage
330 V
Section1
Maximum Plate Dissipation
1 W
Section1
SECTION 2
Pentode
Other
Maximum Plate Voltage
330 V
Section2
Maximum Screen Voltage
330 V
Section2
Maximum Plate Dissipation
5 W
Section2
Maximum Screen Dissipation
1.1 W
Section2
Characteristic
Plate Resistance
60000 ohm
Section2
Transconductance
11500 uS
Section2