Data set 01
1950 Sylvania
Published operating points and test conditions from this source.
SECTION 1
Triode
Application
Service
Vertical deflection oscillator
SECTION 2
Triode
Application
Service
Vertical deflection amplifier
Power - TV Vertical Output ·Triode-Triode
8CS7
Dissimilar dual triode for combined television vertical oscillator and deflection-amplifier service. Its small-signal section generates the scanning waveform while the higher-current output section handles vertical deflection and kilovolt-level pulse voltages.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- 9EF
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 8.4 V / 450 mA
Description
Dissimilar medium-mu dual triode used as a 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
- 9EF
- 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
9EF - 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, 9EF |
| PIN3Base Pin | B | G1 — Control Grid Original chart label: 2G1; manufacturer verification pending | Unverified EIA Base Connections, printed page 132, 9EF |
| PIN4Base Pin | — | H — Heater Original chart label: H; manufacturer verification pending | Unverified EIA Base Connections, printed page 132, 9EF |
| PIN5Base Pin | — | H — Heater Original chart label: H; manufacturer verification pending | Unverified EIA Base Connections, printed page 132, 9EF |
| PIN6Base Pin | A | P — Plate (Anode) Original chart label: 1P; manufacturer verification pending | Unverified EIA Base Connections, printed page 132, 9EF |
| PIN7Base Pin | A | G1 — Control Grid Original chart label: 1G1; manufacturer verification pending | Unverified EIA Base Connections, printed page 132, 9EF |
| PIN8Base Pin | A | K — Cathode Original chart label: 1K; manufacturer verification pending | Unverified EIA Base Connections, printed page 132, 9EF |
| PIN9Base Pin | B | K — Cathode Original chart label: 2K; manufacturer verification pending | Unverified EIA Base Connections, printed page 132, 9EF |
Section ratings
2 physical sections, each with unique specifications.
Section 1
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 7700 Ω
- Transconductance
- 0.0022 S
- Amplification factor
- 17
- 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
- 3450 Ω
- Transconductance
- 0.0044 S
- Amplification factor
- 15
- Max plate voltage
- 300 V
- Max plate dissipation
- 6.5 W
- Max cathode current
- 30 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
Voltage (ac or dc)
8.4 V
Voltage (ac or dc) ...... 6.3 8.4 Volts
Grid Cutoff Voltage . . -24 *
-221 V
Grid Cutoff Voltage . . -24 * -221 Volts
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,Oscillator
Grid_voltage
-8.5 V
TVVerticalDeflection,Oscillator
Characteristic
Plate_current
10.5 mA
TVVerticalDeflection,Oscillator
Transconductance
2200 uS
TVVerticalDeflection,Oscillator
Amplification_factor
17
TVVerticalDeflection,Oscillator
Plate_resistance
7700 ohm
TVVerticalDeflection,Oscillator
SECTION 2
Triode
Other
Maximum_peak_positive_plate_voltage
2200 V
Maximum_peak_cathode_current
105 mA
Plate_voltage
250 V
TVVerticalDeflection
Grid_voltage
-10.5 V
TVVerticalDeflection
Heater_warmup_time
11 s
TVVerticalDeflection
Characteristic
Plate_current
19 mA
TVVerticalDeflection
Transconductance
4500 uS
TVVerticalDeflection
Amplification_factor
15.5
TVVerticalDeflection
Plate_resistance
3450 ohm
TVVerticalDeflection
Data set 04
1971 RCA HB3 Binder 5 of 7
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Heater voltage nominal
8.4 V
Heater current nominal
450 mA
SECTION 2
Triode
Other
Heater voltage nominal
8.4 V
Heater current nominal
450 mA
Data set 05
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 8CS7 target datasheet entry; Section1
Heater Current 0.6
450 mA
Published in approved 8CS7 target datasheet entry; Section1
Heater Warm-up Time (Average) 11
11 seconds
Published in approved 8CS7 target datasheet entry; Section1
DC Plate Voltage 500
600 V
Published in approved 8CS7 target datasheet entry; Section1
Peak Negative-Pulse Grid Voltage 400
250 V
Published in approved 8CS7 target datasheet entry; Section1
Peak Cathode Current 70
105 mA
Published in approved 8CS7 target datasheet entry; Section1
Average Cathode Current 20
30 mA
Published in approved 8CS7 target datasheet entry; Section1
Plate Dissipation 1.25
8.6 W
Published in approved 8CS7 target datasheet entry; Section1
Grid-Circuit Resistance 2.2
2.2 MΩ
Published in approved 8CS7 target datasheet entry; Section1
# Pulse duration must not exceed 15% of a vertical scanning cycle (
2.5 milliseconds
Published in approved 8CS7 target datasheet entry; Section1
Capacitance
Grid to Plate 2.6
2.6 pF
Published in approved 8CS7 target datasheet entry; Section1
Grid to Cathode and Heater 1.8
3 pF
Published in approved 8CS7 target datasheet entry; Section1
Plate to Cathode and Heater 0.5
0.5 pF
Published in approved 8CS7 target datasheet entry; Section1
Characteristic
Plate Voltage 250
250 V
Published in approved 8CS7 target datasheet entry; Section1
Grid Voltage —8.5
-10.5 V
Published in approved 8CS7 target datasheet entry; Section1
Plate Resistance (Approx.) 7700
3450 Ω
Published in approved 8CS7 target datasheet entry; Section1
2200
4500 µS
Published in approved 8CS7 target datasheet entry; Section1
10.5
19 mA
Published in approved 8CS7 target datasheet entry; Section1
Plate Current for grid voltage of
-16 V
Published in approved 8CS7 target datasheet entry; Section1
Plate Current for grid voltage of --16 volts
3 mA
Published in approved 8CS7 target datasheet entry; Section1
SECTION 2
Triode
Other
Heater Voltage (ac/dc) 6.3
8.4 V
Published in approved 8CS7 target datasheet entry; Section2
Heater Current 0.6
450 mA
Published in approved 8CS7 target datasheet entry; Section2
Heater Warm-up Time (Average) 11
11 seconds
Published in approved 8CS7 target datasheet entry; Section2
DC Plate Voltage 500
600 V
Published in approved 8CS7 target datasheet entry; Section2
Peak Negative-Pulse Grid Voltage 400
250 V
Published in approved 8CS7 target datasheet entry; Section2
Peak Cathode Current 70
105 mA
Published in approved 8CS7 target datasheet entry; Section2
Average Cathode Current 20
30 mA
Published in approved 8CS7 target datasheet entry; Section2
Plate Dissipation 1.25
8.6 W
Published in approved 8CS7 target datasheet entry; Section2
Grid-Circuit Resistance 2.2
2.2 MΩ
Published in approved 8CS7 target datasheet entry; Section2
# Pulse duration must not exceed 15% of a vertical scanning cycle (
2.5 milliseconds
Published in approved 8CS7 target datasheet entry; Section2
Capacitance
Grid to Plate 2.6
2.6 pF
Published in approved 8CS7 target datasheet entry; Section2
Grid to Cathode and Heater 1.8
3 pF
Published in approved 8CS7 target datasheet entry; Section2
Plate to Cathode and Heater 0.5
0.5 pF
Published in approved 8CS7 target datasheet entry; Section2
Characteristic
Plate Voltage 250
250 V
Published in approved 8CS7 target datasheet entry; Section2
Grid Voltage —8.5
-10.5 V
Published in approved 8CS7 target datasheet entry; Section2
Plate Resistance (Approx.) 7700
3450 Ω
Published in approved 8CS7 target datasheet entry; Section2
2200
4500 µS
Published in approved 8CS7 target datasheet entry; Section2
10.5
19 mA
Published in approved 8CS7 target datasheet entry; Section2
Plate Current for grid voltage of
-16 V
Published in approved 8CS7 target datasheet entry; Section2
Plate Current for grid voltage of --16 volts
3 mA
Published in approved 8CS7 target datasheet entry; Section2