Data set 01
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 2
Triode
Characteristic
Section2Transconductance
4400 uS
Section2
Power - TV Vertical Output ·Triode-Triode
8CM7
Dissimilar dual triode for combined television vertical-deflection oscillator and output-amplifier service. A medium-mu small-signal section generates the sweep waveform while the larger 6 W section supplies the required deflection current.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- 9ES
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 8.4 V / 450 mA
Description
Dissimilar medium-mu dual triode used as combined vertical-deflection oscillator and vertical-deflection amplifier in television receivers.
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
- 9ES
- 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
9ES - Terminal pinout
Electrical assignments shared by every tube using this base designation.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN1Base Pin | B | P — Plate (Anode) Original chart label: 2P; manufacturer verification pending | Unverified EIA Base Connections, printed page 132, 9ES |
| PIN3Base Pin | A | K — Cathode Original chart label: 1K; manufacturer verification pending | Unverified EIA Base Connections, printed page 132, 9ES |
| PIN4Base Pin | — | H — Heater Original chart label: H; manufacturer verification pending | Unverified EIA Base Connections, printed page 132, 9ES |
| PIN5Base Pin | — | H — Heater Original chart label: H; manufacturer verification pending | Unverified EIA Base Connections, printed page 132, 9ES |
| PIN6Base Pin | A | P — Plate (Anode) Original chart label: 1P; manufacturer verification pending | Unverified EIA Base Connections, printed page 132, 9ES |
| PIN7Base Pin | A | G1 — Control Grid Original chart label: 1G1; manufacturer verification pending | Unverified EIA Base Connections, printed page 132, 9ES |
| PIN8Base Pin | B | G1 — Control Grid Original chart label: 2G1; manufacturer verification pending | Unverified EIA Base Connections, printed page 132, 9ES |
| PIN9Base Pin | B | K — Cathode Original chart label: 2K; manufacturer verification pending | Unverified EIA Base Connections, printed page 132, 9ES |
Section ratings
2 physical sections, each with unique specifications.
Section 1
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 10500 Ω
- Transconductance
- 0.002 S
- Amplification factor
- 21
- Max plate voltage
- 300 V
- Max plate dissipation
- 1.25 W
- Max cathode current
- 20 mA
- 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
- 4100 Ω
- Transconductance
- 0.0044 S
- Amplification factor
- 18
- Max plate voltage
- 300 V
- Max plate dissipation
- 6 W
- Max cathode current
- 35 mA
- 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
8.4 V
Rated heater condition
Heater current
450 mA
Rated heater condition
Other
Warm-upTime^
11 s
Warm-upTime^ ........... 11 11 Seconds Peak Positive Pulse
Plate Voltage
250 V
Plate Voltage ..... 200 250 Volts
Grid Voltage
-8 V
Grid Voltage ...... -7 -8 Volts
Plate Current
20 mA
Plate Current ..... 5 20 Ma.
probable operciting conditions with respect to supply.voltage 10500
4100 ohm
probable operciting conditions with respect to supply.voltage 10500 4100 Ohms
Current of
1 mA
Current of 1 Ma. . . _10
SECTION 2
Triode
Characteristic
Heater voltage
8.4 V
Rated heater condition
Heater current
450 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
TVVerticalDeflection
Characteristic
Plate_current
5 mA
TVVerticalDeflection
Plate_resistance
10500 ohm
TVVerticalDeflection
Transconductance
2000 uS
TVVerticalDeflection
SECTION 2
Triode
Other
Plate_voltage
250 V
TVVerticalDeflection
Characteristic
Plate_current
20 mA
TVVerticalDeflection
Plate_resistance
4200 ohm
TVVerticalDeflection
Transconductance
4400 uS
TVVerticalDeflection
Data set 04
1975 RCA RC30
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
6.3
8.4 V
Published in approved 8CM7 target datasheet entry; Section1
0.6
450 mA
Published in approved 8CM7 target datasheet entry; Section1
11
11 seconds
Published in approved 8CM7 target datasheet entry; Section1
DC Plate Voltage 550
550 V
Published in approved 8CM7 target datasheet entry; Section1
Peak Positive-Pulse Plate Volt&ge#
2200 V
Published in approved 8CM7 target datasheet entry; Section1
Peak Negative-Pulse Grid Voltage 220
220 V
Published in approved 8CM7 target datasheet entry; Section1
Peak Cathode Current 77
77 mA
Published in approved 8CM7 target datasheet entry; Section1
Average Cathode Current 17
22 mA
Published in approved 8CM7 target datasheet entry; Section1
Plate Dissipation 1.45
6 W
Published in approved 8CM7 target datasheet entry; Section1
For fixed-bias operation 2.2
1 MΩ
Published in approved 8CM7 target datasheet entry; Section1
For cathode-bias operation 2.2
2.5 MΩ
Published in approved 8CM7 target datasheet entry; Section1
# Pulse duration must not exceed 15% of a vertical scanning cycle (
2.5 milliseconds
Published in approved 8CM7 target datasheet entry; Section1
Capacitance
Grid to Plate 3.8
3 pF
Published in approved 8CM7 target datasheet entry; Section1
2
3.5 pF
Published in approved 8CM7 target datasheet entry; Section1
0.5
0.4 pF
Published in approved 8CM7 target datasheet entry; Section1
Characteristic
Plate Voltage 200
250 V
Published in approved 8CM7 target datasheet entry; Section1
Grid Voltage —7
-8 V
Published in approved 8CM7 target datasheet entry; Section1
10500
4100 Ω
Published in approved 8CM7 target datasheet entry; Section1
Transconductance 2000
4400 µS
Published in approved 8CM7 target datasheet entry; Section1
Plate Current 5
20 mA
Published in approved 8CM7 target datasheet entry; Section1
10 volts
1 mA
Published in approved 8CM7 target datasheet entry; Section1
Grid Voltage (Approx.) for plate current of 10 juA
-14 V
Published in approved 8CM7 target datasheet entry; Section1
SECTION 2
Triode
Other
6.3
8.4 V
Published in approved 8CM7 target datasheet entry; Section2
0.6
450 mA
Published in approved 8CM7 target datasheet entry; Section2
11
11 seconds
Published in approved 8CM7 target datasheet entry; Section2
DC Plate Voltage 550
550 V
Published in approved 8CM7 target datasheet entry; Section2
Peak Positive-Pulse Plate Volt&ge#
2200 V
Published in approved 8CM7 target datasheet entry; Section2
Peak Negative-Pulse Grid Voltage 220
220 V
Published in approved 8CM7 target datasheet entry; Section2
Peak Cathode Current 77
77 mA
Published in approved 8CM7 target datasheet entry; Section2
Average Cathode Current 17
22 mA
Published in approved 8CM7 target datasheet entry; Section2
Plate Dissipation 1.45
6 W
Published in approved 8CM7 target datasheet entry; Section2
For fixed-bias operation 2.2
1 MΩ
Published in approved 8CM7 target datasheet entry; Section2
For cathode-bias operation 2.2
2.5 MΩ
Published in approved 8CM7 target datasheet entry; Section2
# Pulse duration must not exceed 15% of a vertical scanning cycle (
2.5 milliseconds
Published in approved 8CM7 target datasheet entry; Section2
Capacitance
Grid to Plate 3.8
3 pF
Published in approved 8CM7 target datasheet entry; Section2
2
3.5 pF
Published in approved 8CM7 target datasheet entry; Section2
0.5
0.4 pF
Published in approved 8CM7 target datasheet entry; Section2
Characteristic
Plate Voltage 200
250 V
Published in approved 8CM7 target datasheet entry; Section2
Grid Voltage —7
-8 V
Published in approved 8CM7 target datasheet entry; Section2
10500
4100 Ω
Published in approved 8CM7 target datasheet entry; Section2
Transconductance 2000
4400 µS
Published in approved 8CM7 target datasheet entry; Section2
Plate Current 5
20 mA
Published in approved 8CM7 target datasheet entry; Section2
10 volts
1 mA
Published in approved 8CM7 target datasheet entry; Section2
Grid Voltage (Approx.) for plate current of 10 juA
-14 V
Published in approved 8CM7 target datasheet entry; Section2