Data set 01
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristic
PentodeTransconductance
10000 uS
Section1
SECTION 2
Triode
Characteristic
TriodeTransconductance
4600 uS
Section2
Power - Pentode (NOT beam) ·Pentode-Triode
8CX8
Triode/pentode combination for television video, sound-IF, sweep-oscillator, and synchronization circuitry.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- 9DX
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 8 V / 600 mA
Description
Medium-mu triode plus sharp-cutoff pentode for television video amplification and sound-IF, sweep-oscillator, sync-separator/amplifier/clipper 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
- 9DX
- Socket code
- B9A
- Base pins
- 9
- Nominal heater voltage
- 8 V
- Nominal heater current
- 600 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
Pentode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 70000 Ω
- Transconductance
- 0.01 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.
Section 2
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 8700 Ω
- Transconductance
- 0.0046 S
- Amplification factor
- 40
- Max plate voltage
- 330 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.
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
Pentode
Other
Plate_voltage
125 V
VideoAmplifier
Screen_voltage
125 V
VideoAmplifier
Characteristic
Plate_current
24 mA
VideoAmplifier
Plate_resistance
70000 ohm
VideoAmplifier
Transconductance
10000 uS
VideoAmplifier
Capacitance
Grid-to-plate capacitance
0.06 pF
Input capacitance
9 pF
Output capacitance
4.4 pF
SECTION 2
Triode
Other
Plate_voltage
150 V
SyncAmplifier
Heater_warmup_time
11 s
SyncAmplifier
Characteristic
Plate_current
9.2 mA
SyncAmplifier
Plate_resistance
8700 ohm
SyncAmplifier
Transconductance
4600 uS
SyncAmplifier
Capacitance
Grid-to-plate capacitance
4.4 pF
Input capacitance
2.2 pF
Output capacitance
0.38 pF
Data set 03
1968 General Electric Co
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
HeaterVoltageNominal
8 V
HeaterCurrentNominal
600 mA
Typical Plate Voltage
200 V
ClassA
Typical Screen Voltage
125 V
ClassA
Characteristic
Plate Resistance
70000 Ohm
Transconductance
10000 uS
SECTION 2
Triode
Characteristic
Plate Resistance
8700 Ohm
Transconductance
4600 uS
Amplification Factor
40
Other
Typical Plate Voltage
150 V
ClassA
Data set 04
1975 RCA RC30
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Heater Voltage (ac/dc) 6.3
8 V
Published in approved 8CX8 target datasheet entry; Section2
Heater Current 0.75
600 mA
Published in approved 8CX8 target datasheet entry; Section2
Heater Warm-up Time (Average)
11 V
Published in approved 8CX8 target datasheet entry; Section2
Plate Voltage 330
330 V
Published in approved 8CX8 target datasheet entry; Section2
Grid-No.2 (Screen-Grid) Voltage
330 V
Published in approved 8CX8 target datasheet entry; Section2
Grid-No.l (Control-Grid) Voltage, Positive-bias value 0
0 V
Published in approved 8CX8 target datasheet entry; Section2
Plate Dissipation 2
5 W
Published in approved 8CX8 target datasheet entry; Section2
For grid-No.2 voltages up to
165 V
Published in approved 8CX8 target datasheet entry; Section2
For grid-No. voltages between 165 and
330 V
Published in approved 8CX8 target datasheet entry; Section2
Plate Supply Voltage 150
200 V
Published in approved 8CX8 target datasheet entry; Section2
For fixed-bias operation 0.5
0.25 MΩ
Published in approved 8CX8 target datasheet entry; Section2
For cathode-bias operation 1
1 MΩ
Published in approved 8CX8 target datasheet entry; Section2
Heater Voltage (ac/dc) 2.4 2.9
6.3 V
Published in approved 8CX8 target datasheet entry; Section2
Heater Current 0.6 0.45
200 mA
Published in approved 8CX8 target datasheet entry; Section2
Heater Warm-up Time (Average) 11
11 seconds
Published in approved 8CX8 target datasheet entry; Section2
Plate Voltage
180 V
Published in approved 8CX8 target datasheet entry; Section2
Grid-No.2 (Screen-Grid) Supply Voltage
180 V
Published in approved 8CX8 target datasheet entry; Section2
Grid-No.l (Control-Grid) Voltage, Positive-bias value
0 V
Published in approved 8CX8 target datasheet entry; Section2
Cathode Current
20 mA
Published in approved 8CX8 target datasheet entry; Section2
Plate Dissipation
2 W
Published in approved 8CX8 target datasheet entry; Section2
For grid-No.2 voltages up to
90 V
Published in approved 8CX8 target datasheet entry; Section2
For grid-No.2 voltages up to 90 volts
0.5 W
Published in approved 8CX8 target datasheet entry; Section2
For grid-No.2 voltages between 90 and
180 V
Published in approved 8CX8 target datasheet entry; Section2
Plate Voltage
125 V
Published in approved 8CX8 target datasheet entry; Section2
Grid-No.l-Circuit Resistance
0.6 MΩ
Published in approved 8CX8 target datasheet entry; Section2
Capacitance
Grid to Plate
4.4 pF
Published in approved 8CX8 target datasheet entry; Section2
Grid to Cathode and Heater
2.2 pF
Published in approved 8CX8 target datasheet entry; Section2
Plate to Cathode and Heater
0.38 pF
Published in approved 8CX8 target datasheet entry; Section2
Grid No.l to Plate
0.06 pF
Published in approved 8CX8 target datasheet entry; Section2
Internal Shield
9 pF
Published in approved 8CX8 target datasheet entry; Section2
Internal Shield
4.4 pF
Published in approved 8CX8 target datasheet entry; Section2
Grid-No.l to Plate
0.03 pF
Published in approved 8CX8 target datasheet entry; Section2
Grid-No.l to Cathode, Heater, Grid No.2 and Internal Shield
4.5 pF
Published in approved 8CX8 target datasheet entry; Section2
Plate to Cathode, Heater, Grid No.2, and Internal Shield
3 pF
Published in approved 8CX8 target datasheet entry; Section2
Characteristic
Grid-No.2 Supply Voltage
125 V
Published in approved 8CX8 target datasheet entry; Section2
Cathode-Bias Resistor 150
68 Ω
Published in approved 8CX8 target datasheet entry; Section2
Plate Resistance (Approx.) 8700
70000 Ω
Published in approved 8CX8 target datasheet entry; Section2
Transconductance 4600
10000 µS
Published in approved 8CX8 target datasheet entry; Section2
Plate Current 9.2
24 mA
Published in approved 8CX8 target datasheet entry; Section2
Grid-No.2 Current
5.2 mA
Published in approved 8CX8 target datasheet entry; Section2
100 /lA —5
-8.5 V
Published in approved 8CX8 target datasheet entry; Section2
Transconductance
8000 µS
Published in approved 8CX8 target datasheet entry; Section2
Plate Current
10 mA
Published in approved 8CX8 target datasheet entry; Section2
Grid-No.2 Current
1.5 mA
Published in approved 8CX8 target datasheet entry; Section2
Grid-No.l Voltage (Approx.) for plate current of 20 /lA
-6 V
Published in approved 8CX8 target datasheet entry; Section2
SECTION 2
Triode
Other
Heater Voltage (ac/dc) 6.3
8 V
Published in approved 8CX8 target datasheet entry; Section1
Heater Current 0.75
600 mA
Published in approved 8CX8 target datasheet entry; Section1
Heater Warm-up Time (Average)
11 V
Published in approved 8CX8 target datasheet entry; Section1
Plate Voltage 330
330 V
Published in approved 8CX8 target datasheet entry; Section1
Grid-No.2 (Screen-Grid) Voltage
330 V
Published in approved 8CX8 target datasheet entry; Section1
Grid-No.l (Control-Grid) Voltage, Positive-bias value 0
0 V
Published in approved 8CX8 target datasheet entry; Section1
Plate Dissipation 2
5 W
Published in approved 8CX8 target datasheet entry; Section1
For grid-No.2 voltages up to
165 V
Published in approved 8CX8 target datasheet entry; Section1
For grid-No. voltages between 165 and
330 V
Published in approved 8CX8 target datasheet entry; Section1
Plate Supply Voltage 150
200 V
Published in approved 8CX8 target datasheet entry; Section1
For fixed-bias operation 0.5
0.25 MΩ
Published in approved 8CX8 target datasheet entry; Section1
For cathode-bias operation 1
1 MΩ
Published in approved 8CX8 target datasheet entry; Section1
Heater Voltage (ac/dc) 2.4 2.9
6.3 V
Published in approved 8CX8 target datasheet entry; Section1
Heater Current 0.6 0.45
200 mA
Published in approved 8CX8 target datasheet entry; Section1
Heater Warm-up Time (Average) 11
11 seconds
Published in approved 8CX8 target datasheet entry; Section1
Plate Voltage
180 V
Published in approved 8CX8 target datasheet entry; Section1
Grid-No.2 (Screen-Grid) Supply Voltage
180 V
Published in approved 8CX8 target datasheet entry; Section1
Grid-No.l (Control-Grid) Voltage, Positive-bias value
0 V
Published in approved 8CX8 target datasheet entry; Section1
Cathode Current
20 mA
Published in approved 8CX8 target datasheet entry; Section1
Plate Dissipation
2 W
Published in approved 8CX8 target datasheet entry; Section1
For grid-No.2 voltages up to
90 V
Published in approved 8CX8 target datasheet entry; Section1
For grid-No.2 voltages up to 90 volts
0.5 W
Published in approved 8CX8 target datasheet entry; Section1
For grid-No.2 voltages between 90 and
180 V
Published in approved 8CX8 target datasheet entry; Section1
Plate Voltage
125 V
Published in approved 8CX8 target datasheet entry; Section1
Grid-No.l-Circuit Resistance
0.6 MΩ
Published in approved 8CX8 target datasheet entry; Section1
Capacitance
Grid to Plate
4.4 pF
Published in approved 8CX8 target datasheet entry; Section1
Grid to Cathode and Heater
2.2 pF
Published in approved 8CX8 target datasheet entry; Section1
Plate to Cathode and Heater
0.38 pF
Published in approved 8CX8 target datasheet entry; Section1
Grid No.l to Plate
0.06 pF
Published in approved 8CX8 target datasheet entry; Section1
Internal Shield
9 pF
Published in approved 8CX8 target datasheet entry; Section1
Internal Shield
4.4 pF
Published in approved 8CX8 target datasheet entry; Section1
Grid-No.l to Plate
0.03 pF
Published in approved 8CX8 target datasheet entry; Section1
Grid-No.l to Cathode, Heater, Grid No.2 and Internal Shield
4.5 pF
Published in approved 8CX8 target datasheet entry; Section1
Plate to Cathode, Heater, Grid No.2, and Internal Shield
3 pF
Published in approved 8CX8 target datasheet entry; Section1
Characteristic
Grid-No.2 Supply Voltage
125 V
Published in approved 8CX8 target datasheet entry; Section1
Cathode-Bias Resistor 150
68 Ω
Published in approved 8CX8 target datasheet entry; Section1
Plate Resistance (Approx.) 8700
70000 Ω
Published in approved 8CX8 target datasheet entry; Section1
Transconductance 4600
10000 µS
Published in approved 8CX8 target datasheet entry; Section1
Plate Current 9.2
24 mA
Published in approved 8CX8 target datasheet entry; Section1
Grid-No.2 Current
5.2 mA
Published in approved 8CX8 target datasheet entry; Section1
100 /lA —5
-8.5 V
Published in approved 8CX8 target datasheet entry; Section1
Transconductance
8000 µS
Published in approved 8CX8 target datasheet entry; Section1
Plate Current
10 mA
Published in approved 8CX8 target datasheet entry; Section1
Grid-No.2 Current
1.5 mA
Published in approved 8CX8 target datasheet entry; Section1
Grid-No.l Voltage (Approx.) for plate current of 20 /lA
-6 V
Published in approved 8CX8 target datasheet entry; Section1