Data set 01
1963 Hitachi
Published operating points and test conditions from this source.
SECTION 1
Triode
Capacitance
Interelectrode capacitances published
1
See source table
Power - Pentode (NOT beam) ·Pentode-Triode
50BM8
Triode/power-pentode combination for compact audio and receiver circuits, with a 7 W pentode output section.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- E9-1
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 50 V / 100 mA
Description
High-mu triode plus power pentode used in television vertical circuits and as an audio-frequency output tube.
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
- E9-1
- Socket code
- B9A
- Base pins
- 9
- Nominal heater voltage
- 50 V
- Nominal heater current
- 100 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
E9-1 - 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
- Transconductance
- 0.0025 S
- Amplification factor
- 70
- Max plate voltage
- 250 V
- Max plate dissipation
- 1 W
- Max cathode current
- 15 mA
Voltage-amplifier triode plus power-output pentode; supplied page refers all other electrical data to 6BM8/ECL82 and does not reproduce it.
Section 2
Pentode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 15000 Ω
- Transconductance
- 0.0068 S
- Amplification factor
- 9.5
- Max plate voltage
- 250 V
- Max screen voltage
- 250 V
- Max plate dissipation
- 7 W
- Max screen dissipation
- 1.8 W
- Max cathode current
- 50 mA
Voltage-amplifier triode plus power-output pentode; supplied page refers all other electrical data to 6BM8/ECL82 and does not reproduce it.
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
1975 RCA RC30
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Input Resistance at frequency of
50 MHz
Published in approved ECL82 target datasheet entry; Section1
Equivalent Noise Resistance
1500 Ω
Published in approved ECL82 target datasheet entry; Section1
For fixed-bias operation 0.5
0.5 MΩ
Published in approved ECL82 target datasheet entry; Section1
For cathode-bias operation 0.5
1 MΩ
Published in approved ECL82 target datasheet entry; Section1
Heater Voltage 6.3
50 V
Published in approved ECL82 target datasheet entry; Section1
Heater Current 0.78
100 mA
Published in approved ECL82 target datasheet entry; Section1
Plate Supply Voltage 550
900 V
Published in approved ECL82 target datasheet entry; Section1
Plate Voltage 300
600 V
Published in approved ECL82 target datasheet entry; Section1
Grid-No.2 Supply Voltage
550 V
Published in approved ECL82 target datasheet entry; Section1
Plate Dissipation 1
7 W
Published in approved ECL82 target datasheet entry; Section1
Grid-No.2 Input
1.8 W
Published in approved ECL82 target datasheet entry; Section1
Plate Voltage 100
200 V
Published in approved ECL82 target datasheet entry; Section1
For fixed-bias operation I
1 MΩ
Published in approved ECL82 target datasheet entry; Section1
For cathode-bias operation 2
2 MΩ
Published in approved ECL82 target datasheet entry; Section1
Characteristic
Plate Resistance (Approx.)
0.02 MΩ
Published in approved ECL82 target datasheet entry; Section1
Transconductance 2500
6400 µS
Published in approved ECL82 target datasheet entry; Section1
Plate Current 3.5
35 mA
Published in approved ECL82 target datasheet entry; Section1
Grid-No.2 Current
7 mA
Published in approved ECL82 target datasheet entry; Section1
SECTION 2
Pentode
Other
Input Resistance at frequency of
50 MHz
Published in approved ECL82 target datasheet entry; Section2
Equivalent Noise Resistance
1500 Ω
Published in approved ECL82 target datasheet entry; Section2
For fixed-bias operation 0.5
0.5 MΩ
Published in approved ECL82 target datasheet entry; Section2
For cathode-bias operation 0.5
1 MΩ
Published in approved ECL82 target datasheet entry; Section2
Heater Voltage 6.3
50 V
Published in approved ECL82 target datasheet entry; Section2
Heater Current 0.78
100 mA
Published in approved ECL82 target datasheet entry; Section2
Plate Supply Voltage 550
900 V
Published in approved ECL82 target datasheet entry; Section2
Plate Voltage 300
600 V
Published in approved ECL82 target datasheet entry; Section2
Grid-No.2 Supply Voltage
550 V
Published in approved ECL82 target datasheet entry; Section2
Plate Dissipation 1
7 W
Published in approved ECL82 target datasheet entry; Section2
Grid-No.2 Input
1.8 W
Published in approved ECL82 target datasheet entry; Section2
Plate Voltage 100
200 V
Published in approved ECL82 target datasheet entry; Section2
For fixed-bias operation I
1 MΩ
Published in approved ECL82 target datasheet entry; Section2
For cathode-bias operation 2
2 MΩ
Published in approved ECL82 target datasheet entry; Section2
Characteristic
Plate Resistance (Approx.)
0.02 MΩ
Published in approved ECL82 target datasheet entry; Section2
Transconductance 2500
6400 µS
Published in approved ECL82 target datasheet entry; Section2
Plate Current 3.5
35 mA
Published in approved ECL82 target datasheet entry; Section2
Grid-No.2 Current
7 mA
Published in approved ECL82 target datasheet entry; Section2