Data set 01
1940 RCA
Published operating points and test conditions from this source.
SECTION 1
Triode
Application
Application
RF_Amplifier_Oscillator_Mixer text
Voltage - Dual Triode (similar high frequency) ·Triode-Triode
6DT8
Dissimilar twin triode intended for FM and television tuner circuits, combining high-frequency amplification with oscillator or mixer functions in receiver front ends.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- 9DE
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 6.3 V / 300 mA
Description
Twin triode used in VHF tuner and oscillator service; the approved entry supplies heater and interelectrode-capacitance data for the 6DT8/12DT8 pair.
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
- 9DE
- Socket code
- B9A
- Base pins
- 9
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 300 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
9DE - Terminal pinout
Electrical assignments shared by every tube using this base designation.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN12P | B | P — Plate (Anode) EIA chart transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 131, 9DE |
| PIN22G1 | B | G1 — Control Grid EIA chart transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 131, 9DE |
| PIN32K | B | K — Cathode EIA chart transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 131, 9DE |
| PIN4H | — | H — Heater EIA chart transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 131, 9DE |
| PIN5H | — | H — Heater EIA chart transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 131, 9DE |
| PIN61P | A | P — Plate (Anode) EIA chart transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 131, 9DE |
| PIN71G1 | A | G1 — Control Grid EIA chart transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 131, 9DE |
| PIN81K | A | K — Cathode EIA chart transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 131, 9DE |
| PIN9IS | A | IS — Internal Screen EIA chart transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 131, 9DE |
Section ratings
2 physical sections, each with unique specifications.
Section 1
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 10900 Ω
- Transconductance
- 0.0055 S
- Amplification factor
- 60
- Max plate voltage
- 300 V
- Max plate dissipation
- 2.5 W
- Max cathode current
- 15 mA
Representative of two identical sections; characteristics promoted from 250 V operating column.
Section 2
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 10900 Ω
- Transconductance
- 0.0055 S
- Amplification factor
- 60
- Max plate voltage
- 300 V
- Max plate dissipation
- 2.5 W
- Max cathode current
- 15 mA
Second physical triode section; electrically identical twin section.
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
Triode
Other
Plate supply voltage
200 V
ClassA1;EachUnit
Cathode bias resistor
270 ohm
ClassA1;EachUnit
Plate current
3.7 mA
ClassA1;EachUnit
Maximum grid voltage, negative bias
50 V
EachUnit
Maximum heater-cathode voltage, heater negative
200 V
EachUnit
Maximum heater-cathode voltage, heater positive total
200 V
EachUnit
Capacitance
Grid-to-plate capacitance
1.6 pF
EachUnit
Grid-to-cathode/heater/shield capacitance
2.7 pF
EachUnit
Plate-to-cathode/heater/shield capacitance
1.6 pF
EachUnit
Data set 03
1968 General Electric Co
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
HeaterVoltageNominal
6.3 V
HeaterCurrentNominal
300 mA
Characteristic
Plate Resistance
10900 Ohm
Transconductance
5500 uS
Amplification Factor
60
Plate Resistance
15000 Ohm
PlateVoltage=100V
Transconductance
4000 uS
PlateVoltage=100V
Plate Resistance
10900 Ohm
PlateVoltage=250V
Transconductance
5500 uS
PlateVoltage=250V
Data set 04
1971 RCA HB3 Binder 4 of 7
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Heater voltage
6.3 V
Heater current
300 mA
Plate-supply voltage
100 V
EachSection
Cathode resistor
270 ohm
EachSection
Plate current
3.7 mA
EachSection
Plate-supply voltage
250 V
EachSection
Cathode resistor
200 ohm
EachSection
Plate current
10 mA
EachSection
Maximum plate voltage
300 V
EachSection
Plate dissipation
2.5 W
EachSection
Characteristic
Amplification factor
60
EachSection
Plate resistance
15000 ohm
EachSection
Transconductance
4000 uS
EachSection
Plate resistance
10900 ohm
EachSection
Transconductance
5500 uS
EachSection
Capacitance
Grid-to-plate capacitance
1.6 pF
EachSection
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
12.6 V
Published in approved 12DT8 target entry; Section1
Heater Current 0.3
150 mA
Published in approved 12DT8 target entry; Section1
Nuvistor type used at frequencies up to
1000 MHz
Published in approved 12DT8 target entry; Section1
2.1
6.3 V
Published in approved 12DT8 target entry; Section1
0.45
135 mA
Published in approved 12DT8 target entry; Section1
Heater Warm-up Time (Average)
8 seconds
Published in approved 12DT8 target entry; Section1
Plate Supply Voltage
300 V
Published in approved 12DT8 target entry; Section1
Plate Voltage
125 V
Published in approved 12DT8 target entry; Section1
Negative-bias value
55 V
Published in approved 12DT8 target entry; Section1
Peak positive value
2 V
Published in approved 12DT8 target entry; Section1
Plate Dissipation
1 W
Published in approved 12DT8 target entry; Section1
Cathode Current
15 mA
Published in approved 12DT8 target entry; Section1
Cathode-Bias Resistor
100 Ω
Published in approved 12DT8 target entry; Section1
Plate Resistance (Approx.)
3100 Ω
Published in approved 12DT8 target entry; Section1
TYPICAL OPERATION AS OSCILLATOR AT
950 MHz
Published in approved 12DT8 target entry; Section1
Plate Voltage
60 V
Published in approved 12DT8 target entry; Section1
Grid Voltage
-2 V
Published in approved 12DT8 target entry; Section1
Grid Resistor
5600 Ω
Published in approved 12DT8 target entry; Section1
Plate Current
8 mA
Published in approved 12DT8 target entry; Section1
Capacitance
Grid to Plate
1.8 pF
Published in approved 12DT8 target entry; Section1
Grid to Cathode, Heater, and Shell
4.4 pF
Published in approved 12DT8 target entry; Section1
Plate to Cathode, Heater, and Shell
1.9 pF
Published in approved 12DT8 target entry; Section1
Plate to Cathode
0.25 pF
Published in approved 12DT8 target entry; Section1
Grid to Cathode
3.7 pF
Published in approved 12DT8 target entry; Section1
Characteristic
Plate Current
10.5 mA
Published in approved 12DT8 target entry; Section1
Grid Voltage (Approx.) for plate current of 10 /xA
7 V
Published in approved 12DT8 target entry; Section1