Data set 01
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 1
Heptode
Characteristic
Heater Warmup Time
11 s
Voltage Radio Detector Converter ·Heptode
4CS6
Pentagrid gated-amplifier tube designed primarily as a combined sync separator and sync clipper in television receivers. Its multiple control grids permit specialized gating and signal-processing behavior rather than ordinary radio frequency-converter service.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- 7CH
- Socket code
- B7G
- Base pins
- 7
- Nominal heater
- 4.2 V / 450 mA
Description
Pentagrid gated-amplifier tube used as a combined sync separator and sync clipper in television receivers.
Socket description
Miniature 7-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- 7CH
- Socket code
- B7G
- Base pins
- 7
- Nominal heater voltage
- 4.2 V
- Nominal heater current
- 450 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
7CH - Terminal pinout
Electrical assignments shared by every tube using this base designation.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN1G1 | A | G1 — Control Grid Chart transcription; independent manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CH |
| PIN2G5 | A | G5 — Fifth GridGroup 7CH2 Chart transcription; independent manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CH |
| PIN2K | A | K — CathodeGroup 7CH2 Chart transcription; independent manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CH |
| PIN3H | — | H — Heater Chart transcription; independent manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CH |
| PIN4H | — | H — Heater Chart transcription; independent manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CH |
| PIN5P | A | P — Plate (Anode) Chart transcription; independent manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CH |
| PIN6G2 | A | G2 — Screen GridGroup 7CH6 Chart transcription; independent manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CH |
| PIN6G4 | A | G4 — Fourth GridGroup 7CH6 Chart transcription; independent manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CH |
| PIN7G3 | A | G3 — Suppressor Grid Chart transcription; independent manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CH |
Section ratings
1 physical section, each with unique specifications.
Section 1
Heptode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 1000000 Ω
- Transconductance
- 0.0011 S
- Max plate voltage
- 300 V
- Max screen voltage
- 100 V
- Max plate dissipation
- 1 W
- Max screen dissipation
- 1 W
- Max cathode current
- 14 mA
- Rectifier warm-up time
- 11 s
Grid-1 transconductance promoted; grid-3 transconductance retained as parameter.
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
Heptode
Other
Plate voltage
100 V
Grid3=-1V
Screen-grid voltage
30 V
Grid 1 voltage
0 V
Grid 3 voltage
-1 V
Plate current
0.8 mA
Screen-grid current
5.5 mA
Characteristics
Grid 1 transconductance
1100 uS
Grid 3 transconductance
1500 uS
Plate resistance
1000000 Ohm
Capacitance
Grid 1 to plate capacitance
0.07 pF
Grid 3 to plate capacitance
0.36 pF
Grid 1 input capacitance
5.5 pF
Grid 3 input capacitance
7 pF
Data set 03
1965 Westinghouse Data Book
Published operating points and test conditions from this source.
SECTION 1
Heptode
Characteristics
Heater Voltage
4.2 V
Heater Current
450 mA
Transconductance
1500 uS
RepresentativePublishedPoint
Plate Resistance
1000000 ohm
RepresentativePublishedPoint
Grid-Plate Capacitance
0.07 pF
PublishedDirectInterelectrodeCapacitance
Other
Maximum Plate Voltage
300 V
Maximum Plate Dissipation
1 W
Data set 04
1966 Tung Sol Electronic Tubes 1 of 4
Published operating points and test conditions from this source.
SECTION 1
Heptode
Other
Plate voltage
100 V
Mixer
Screen voltage
100 V
Mixer
Plate current
6 mA
Mixer
Application
Dual-control heptode for gating, mixing, and keyed AGC service
Section1
Characteristic
Conversion transconductance
450 µS
Mixer
Data set 05
1968 General Electric Co
Published operating points and test conditions from this source.
SECTION 1
Heptode
Other
Heater Voltage
4.2 V
Heater Current
450 mA
Data set 06
1971 RCA HB3 Binder 4 of 7
Published operating points and test conditions from this source.
SECTION 1
Heptode
Other
Heater Current
420 mA to 480 mA
Published nominal ± tolerance
Heater Voltage
4.2 V
At heater current 0.45 A
Warm-Up Time
11 s
Average
Plate Voltage
10 V
Inherited from explicitly referenced 6-volt parent type; heater variant
Screen Grid Voltage
30 V
Inherited from explicitly referenced 6-volt parent type; heater variant
Plate Current
2 mA
Inherited from explicitly referenced 6-volt parent type; heater variant
Screen Grid Current
4.5 mA
Inherited from explicitly referenced 6-volt parent type; heater variant
Cathode Current
14 mA
Inherited from explicitly referenced 6-volt parent type; heater variant
Data set 07
1975 RCA RC30
Published operating points and test conditions from this source.
SECTION 1
Heptode
Other
Heater Voltage (ac/dc) 3.15 4.2 6.3
12.6 V
Published in approved 12CS6 target entry; Section1
Heater Current 0.6 0.45 0.3
150 mA
Published in approved 12CS6 target entry; Section1
Heater Warm-up Time (Average) 11 11
11 seconds
Published in approved 12CS6 target entry; Section1
Grid-No.3-to-Plate Transconductance
1500 µS
Published in approved 12CS6 target entry; Section1
Grid-No.l-to-PIate Transconductance
1100 µS
Published in approved 12CS6 target entry; Section1
Plate Current 0.8
1 mA
Published in approved 12CS6 target entry; Section1
Grids-No.2-and-No.-4 Current 5.5
1.3 mA
Published in approved 12CS6 target entry; Section1
50 iiA
2.2 V
Published in approved 12CS6 target entry; Section1
50 /l A —
-2.6 V
Published in approved 12CS6 target entry; Section1
Plate Voltage
300 V
Published in approved 12CS6 target entry; Section1
Grids-No.2-and-No.4 Supply Voltage
300 V
Published in approved 12CS6 target entry; Section1
Cathode Current
14 mA
Published in approved 12CS6 target entry; Section1
Plate Dissipation
1 W
Published in approved 12CS6 target entry; Section1
For grids-No. 2-and-No.4 voltages up to
150 V
Published in approved 12CS6 target entry; Section1
For grids-No. 2-and-No.4 voltages up to 150 volts
1 W
Published in approved 12CS6 target entry; Section1
For grids-No.2-and-No.4 voltages between 150 and
300 V
Published in approved 12CS6 target entry; Section1
Grid-No.l-Circuit Resistance
0.47 MΩ
Published in approved 12CS6 target entry; Section1
Grid-No. 3-Circuit Resistance
2.2 MΩ
Published in approved 12CS6 target entry; Section1
Capacitance
Grid No.4, and Grid No.5
5.5 pF
Published in approved 12CS6 target entry; Section1
Grid No.4, and Grid No.5
7 pF
Published in approved 12CS6 target entry; Section1
Grid No.4, and Grid No.5
7.5 pF
Published in approved 12CS6 target entry; Section1
Characteristic
Plate Voltage 100
100 V
Published in approved 12CS6 target entry; Section1
Plate Resistance (Approx.) 0.7
1 MΩ
Published in approved 12CS6 target entry; Section1