Data set 01
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
PLATE VOLTAGE
125 VOLTS
Published datasheet value
PLATE CURRENT
12 MA
Published datasheet value
Voltage Pentode - Sharp Cutoff (single) ·Pentode
3DK6
Sharp-cutoff high-transconductance pentode for IF amplification in color and monochrome television receivers.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- 7CM
- Socket code
- B7G
- Base pins
- 7
- Nominal heater
- 3.15 V / 600 mA
Description
Sharp-cutoff miniature pentode used as an IF amplifier in color and black-and-white 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
- 7CM
- Socket code
- B7G
- Base pins
- 7
- Nominal heater voltage
- 3.15 V
- Nominal heater current
- 600 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
7CM - Terminal pinout
Electrical assignments shared by every tube using this base designation.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN1G1 | A | G1 — Control Grid EIA chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CM |
| PIN2K | A | K — Cathode EIA chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CM |
| PIN3H | — | H — Heater EIA chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CM |
| PIN4H | — | H — Heater EIA chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CM |
| PIN5P | A | P — Plate (Anode) EIA chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CM |
| PIN6G2 | A | G2 — Screen Grid EIA chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CM |
| PIN7G3 | A | G3 — Suppressor GridGroup 7CM7 EIA chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CM |
| PIN7IS | A | IS — Internal ScreenGroup 7CM7 EIA chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CM |
Section ratings
1 physical section, each with unique specifications.
Section 1
Pentode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 350000 Ω
- Transconductance
- 0.0098 S
- Max plate voltage
- 330 V
- Max screen voltage
- 330 V
- Max plate dissipation
- 2.3 W
- Max screen dissipation
- 0.55 W
Sparse-source exception: this sheet does not reproduce the electrical ratings/characteristics of 6DK6; no external values imported.
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
Pentode
Other
Plate voltage
125 V
Screen-grid voltage
125 V
Cathode bias resistor
56 Ohm
Plate current
12 mA
Screen-grid current
3.8 mA
Characteristics
Plate resistance
350000 Ohm
Transconductance
9800 uS
Control-grid cutoff voltage
-6.5 V
Capacitance
Grid-to-plate capacitance
0.025 pF
Unshielded
Data set 03
1966 Tung Sol Electronic Tubes 1 of 4
Published operating points and test conditions from this source.
SECTION 1
Pentode
Capacitance
Grid-to-plate capacitance maximum
0.025 pF
Section1
Input capacitance
6.3 pF
Section1
Output capacitance
1.9 pF
Section1
Other
Plate voltage
125 V
IFAmplifier
Screen voltage
125 V
IFAmplifier
Cathode-bias resistor
56 Ω
IFAmplifier
Plate current
12 mA
IFAmplifier
Screen current
3.8 mA
IFAmplifier
Characteristic
Transconductance
9800 µS
Section1
Plate resistance
0.35 MΩ
Section1
Grid-1 cutoff bias
-6.5 V
Section1
Heater warm-up time
11 s
Section1
Data set 04
1968 General Electric Co
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Heater warm-up time
11 s
Data set 05
1975 RCA RC30
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Plate Current
15 mA
Published in approved 12DK6 target entry; Section1
Equivalent Noise Resistance
300 Ω
Published in approved 12DK6 target entry; Section1
Grid-Circuit Resistance
1 MΩ
Published in approved 12DK6 target entry; Section1
Heater to Cathode Circuit Resistance
0.02 MΩ
Published in approved 12DK6 target entry; Section1
Heater Voltage (ac/dc) 3.16 4.2 6.3
12.6 V
Published in approved 12DK6 target entry; Section1
Heater Current 0.6 0.45 0.3
150 mA
Published in approved 12DK6 target entry; Section1
Plate Voltage
330 V
Published in approved 12DK6 target entry; Section1
Grid-No.3 (Suppressor-Grid) Voltage, Positive value
0 V
Published in approved 12DK6 target entry; Section1
Grid-No.2 (Screen-Grid) Supply Voltage
330 V
Published in approved 12DK6 target entry; Section1
Grid-No.l (Control-Grid) Voltage, Positive-bias value
0 V
Published in approved 12DK6 target entry; Section1
Plate Dissipation
2.3 W
Published in approved 12DK6 target entry; Section1
For grid-No.2 voltages up to
165 V
Published in approved 12DK6 target entry; Section1
For grid-No.2 voltages up to 165 volts
0.55 W
Published in approved 12DK6 target entry; Section1
For grid-No.2 voltages between 165 and
330 V
Published in approved 12DK6 target entry; Section1
Capacitance
Internal Shield
6.3 pF
Published in approved 12DK6 target entry; Section1
Internal Shield
1.9 pF
Published in approved 12DK6 target entry; Section1
Characteristic
Grid-No.! Voltagre (Approx.) for plate current of 20 fiA
-6.5 V
Published in approved 12DK6 target entry; Section1