Data set 01
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 2
Pentode
Characteristic
PentodeTransconductance
8000 uS
Section2
Voltage Triode Pentode ·Pentode-Triode
8BA8A
Medium-mu triode plus sharp-cutoff pentode for television video/AGC/reactance service and low-frequency oscillator or phase-splitter circuits.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- 9DX
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 8.4 V / 450 mA
Description
Medium-mu triode plus sharp-cutoff pentode for television video/AGC/reactance service and low-frequency oscillator/phase-splitter circuits.
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
- 9DX
- Socket code
- B9A
- Base pins
- 9
- Nominal heater voltage
- 8.4 V
- Nominal heater current
- 450 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
9DX - Terminal pinout
Electrical assignments shared by every tube using this base designation.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN12K | B | K — Cathode EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 131, 9DX |
| PIN22G1 | B | G1 — Control Grid EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 131, 9DX |
| PIN32P | B | P — Plate (Anode) EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 131, 9DX |
| PIN4H | — | H — Heater EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 131, 9DX |
| PIN5H | — | H — Heater EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 131, 9DX |
| PIN61G3 | A | G3 — Suppressor GridGroup 9DX6 EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 131, 9DX |
| PIN6IS | A | IS — Internal ScreenGroup 9DX6 EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 131, 9DX |
| PIN61K | A | K — CathodeGroup 9DX6 EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 131, 9DX |
| PIN71G1 | A | G1 — Control Grid EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 131, 9DX |
| PIN81G2 | A | G2 — Screen Grid EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 131, 9DX |
| PIN91P | A | P — Plate (Anode) EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 131, 9DX |
Section ratings
2 physical sections, each with unique specifications.
Section 1
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 6700 Ω
- Transconductance
- 0.0027 S
- Amplification factor
- 38
- Max plate voltage
- 300 V
- Max plate dissipation
- 2 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
- 400000 Ω
- Transconductance
- 0.008 S
- Max plate voltage
- 300 V
- Max screen voltage
- 300 V
- Max plate dissipation
- 3.25 W
- Max screen 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.
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 2 of 4
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Plate_voltage
200 V
ClassA
Characteristic
Plate_current
8 mA
ClassA
Amplification_factor
38
ClassA
Plate_resistance
6700 ohm
ClassA
Transconductance
5700 uS
ClassA
SECTION 2
Pentode
Other
Plate_voltage
200 V
VideoAmplifier
Screen_voltage
150 V
VideoAmplifier
Cathode_bias_resistor
100 ohm
VideoAmplifier
Characteristic
Plate_current
13 mA
VideoAmplifier
Screen_current
3.5 mA
VideoAmplifier
Plate_resistance
400000 ohm
VideoAmplifier
Transconductance
9000 uS
VideoAmplifier
Data set 03
1975 RCA RC30
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Heater Voltage (ac/dc) 6.3
8.4 V
Published in approved 8BA8A target datasheet entry; Section1
Heater Current 0.3
450 mA
Published in approved 8BA8A target datasheet entry; Section1
Heater Warm-up Time (Average)
11 seconds
Published in approved 8BA8A target datasheet entry; Section1
Pentode Plate to Triode Plate 0.15
0.023 pF
Published in approved 8BA8A target datasheet entry; Section1
Plate Voltage 300
300 V
Published in approved 8BA8A target datasheet entry; Section1
Grid-No.2 (Screen-Grid) Supply Voltage
300 V
Published in approved 8BA8A target datasheet entry; Section1
Negative-bias value
-60 V
Published in approved 8BA8A target datasheet entry; Section1
Positive-bias value
0 V
Published in approved 8BA8A target datasheet entry; Section1
For grid-No.2 voltages up to
150 V
Published in approved 8BA8A target datasheet entry; Section1
For grid-No.2 voltages up to 150 volts
1 W
Published in approved 8BA8A target datasheet entry; Section1
For grid-No.2 voltages between 150 and
300 V
Published in approved 8BA8A target datasheet entry; Section1
Plate-Supply Voltage 200
200 V
Published in approved 8BA8A target datasheet entry; Section1
For fixed-bias operation 0.5
0.25 MΩ
Published in approved 8BA8A target datasheet entry; Section1
For cathode-bias operation 1
1 MΩ
Published in approved 8BA8A target datasheet entry; Section1
Capacitance
Grid to Plate 2.2
2.2 pF
Published in approved 8BA8A target datasheet entry; Section1
Grid to Cathode and Heater 2.5
2.7 pF
Published in approved 8BA8A target datasheet entry; Section1
Plate to Cathode and Heater 0.4
1.9 pF
Published in approved 8BA8A target datasheet entry; Section1
Grid No.l to Plate 0.06
0.05 pF
Published in approved 8BA8A target datasheet entry; Section1
No.3. and Internal Shield 10
10 pF
Published in approved 8BA8A target datasheet entry; Section1
and Internal Shield 3.6 4
5 pF
Published in approved 8BA8A target datasheet entry; Section1
Triode Grid to Pentode Plate 0.016
0.006 pF
Published in approved 8BA8A target datasheet entry; Section1
Pentode Grid No.l to Triode Plate 0.006
0.003 pF
Published in approved 8BA8A target datasheet entry; Section1
Characteristic
Grid-No.2 Supply Voltage
150 V
Published in approved 8BA8A target datasheet entry; Section1
Grid-No.l Voltage
-8 V
Published in approved 8BA8A target datasheet entry; Section1
Cathode-Bias Resistor
180 Ω
Published in approved 8BA8A target datasheet entry; Section1
Plate Resistance (Approx.) 6700
400000 Ω
Published in approved 8BA8A target datasheet entry; Section1
Plate Current 8
13 mA
Published in approved 8BA8A target datasheet entry; Section1
Grid-No.2 Current
3.5 mA
Published in approved 8BA8A target datasheet entry; Section1
10 n A —16
-10 V
Published in approved 8BA8A target datasheet entry; Section1
SECTION 2
Pentode
Other
Heater Voltage (ac/dc) 6.3
8.4 V
Published in approved 8BA8A target datasheet entry; Section2
Heater Current 0.3
450 mA
Published in approved 8BA8A target datasheet entry; Section2
Heater Warm-up Time (Average)
11 seconds
Published in approved 8BA8A target datasheet entry; Section2
Pentode Plate to Triode Plate 0.15
0.023 pF
Published in approved 8BA8A target datasheet entry; Section2
Plate Voltage 300
300 V
Published in approved 8BA8A target datasheet entry; Section2
Grid-No.2 (Screen-Grid) Supply Voltage
300 V
Published in approved 8BA8A target datasheet entry; Section2
Negative-bias value
-60 V
Published in approved 8BA8A target datasheet entry; Section2
Positive-bias value
0 V
Published in approved 8BA8A target datasheet entry; Section2
For grid-No.2 voltages up to
150 V
Published in approved 8BA8A target datasheet entry; Section2
For grid-No.2 voltages up to 150 volts
1 W
Published in approved 8BA8A target datasheet entry; Section2
For grid-No.2 voltages between 150 and
300 V
Published in approved 8BA8A target datasheet entry; Section2
Plate-Supply Voltage 200
200 V
Published in approved 8BA8A target datasheet entry; Section2
For fixed-bias operation 0.5
0.25 MΩ
Published in approved 8BA8A target datasheet entry; Section2
For cathode-bias operation 1
1 MΩ
Published in approved 8BA8A target datasheet entry; Section2
Capacitance
Grid to Plate 2.2
2.2 pF
Published in approved 8BA8A target datasheet entry; Section2
Grid to Cathode and Heater 2.5
2.7 pF
Published in approved 8BA8A target datasheet entry; Section2
Plate to Cathode and Heater 0.4
1.9 pF
Published in approved 8BA8A target datasheet entry; Section2
Grid No.l to Plate 0.06
0.05 pF
Published in approved 8BA8A target datasheet entry; Section2
No.3. and Internal Shield 10
10 pF
Published in approved 8BA8A target datasheet entry; Section2
and Internal Shield 3.6 4
5 pF
Published in approved 8BA8A target datasheet entry; Section2
Triode Grid to Pentode Plate 0.016
0.006 pF
Published in approved 8BA8A target datasheet entry; Section2
Pentode Grid No.l to Triode Plate 0.006
0.003 pF
Published in approved 8BA8A target datasheet entry; Section2
Characteristic
Grid-No.2 Supply Voltage
150 V
Published in approved 8BA8A target datasheet entry; Section2
Grid-No.l Voltage
-8 V
Published in approved 8BA8A target datasheet entry; Section2
Cathode-Bias Resistor
180 Ω
Published in approved 8BA8A target datasheet entry; Section2
Plate Resistance (Approx.) 6700
400000 Ω
Published in approved 8BA8A target datasheet entry; Section2
Plate Current 8
13 mA
Published in approved 8BA8A target datasheet entry; Section2
Grid-No.2 Current
3.5 mA
Published in approved 8BA8A target datasheet entry; Section2
10 n A —16
-10 V
Published in approved 8BA8A target datasheet entry; Section2