Data set 01
1953 RFT Rundfunk Technik
Published operating points and test conditions from this source.
SECTION 1
Triode
Application
Application
VoltageAmplifier text
Voltage - Dual Triode (similar) ·Triode-Triode
ECC82
Medium-mu twin triode for general-purpose voltage amplification, phase inversion, multivibrators, and control circuits, with two similar sections and moderate current capability.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- 9A
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 12.6 V / 150 mA
Description
Twin triode with separate cathodes for AF preamplifier service; source also designates ECC82.
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
- 9A
- Socket code
- B9A
- Base pins
- 9
- Nominal heater voltage
- 12.6 V
- Nominal heater current
- 150 mA
- Parallel heater voltage
- 6.3 V
- Parallel heater current
- 300 mA
- Series capable
- Yes
9A - Terminal pinout
Electrical assignments shared by every tube using this base designation.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN12P | B | P — Plate (Anode) EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 130, 9A |
| PIN22G1 | B | G1 — Control Grid EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 130, 9A |
| PIN32K | B | K — Cathode EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 130, 9A |
| PIN4H | — | H — Heater EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 130, 9A |
| PIN5H | — | H — Heater EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 130, 9A |
| PIN61P | A | P — Plate (Anode) EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 130, 9A |
| PIN71G1 | A | G1 — Control Grid EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 130, 9A |
| PIN81K | A | K — Cathode EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 130, 9A |
| PIN9HCT | — | HCT — Heater Center Tap EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 130, 9A |
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
- 2.75 W
- Max cathode current
- 20 mA
R.F. double triode with 6.3/12.6 V series-parallel heater arrangement.
Section 2
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 7700 Ω
- Transconductance
- 0.0022 S
- Amplification factor
- 17
- Max plate voltage
- 300 V
- Max plate dissipation
- 2.75 W
- Max cathode current
- 20 mA
Second physical triode restored.
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
1958 Amperex Industrial
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Plate voltage
250 V
Published table
Plate current
10.5 mA
Published table
Characteristic
Plate resistance
7700 ohm
Published table
Transconductance
2200 µS
Published table
Amplification factor
17
Published table
Heater/filament voltage
6.3 V
Published rating
Heater/filament current
300 mA
Published rating
Series heater voltage
12.6 V
SeriesHeater
Series heater current
150 mA
SeriesHeater
Data set 03
195X Tesla
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristics
Interelectrode capacitances
Published
See source sheet for electrode-specific capacitance values
Data set 04
1961 Ferranti Technical Handbook
Published operating points and test conditions from this source.
SECTION 1
Triode
Application
Application
Amplifier / phase inverter / oscillator / multivibrator
Data set 05
1963 Amperex Condensed
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristic
Heater voltage
6.3 V
Published heater rating
Heater current
300 mA
Published heater rating
Amplification factor
17
VoltageAmplifier
Plate resistance
7700 ohm
VoltageAmplifier
Transconductance
2200 µS
VoltageAmplifier
Series heater voltage
12.6 V
SeriesHeater
Other
Plate voltage
250 V
VoltageAmplifier
Control-grid bias
-8.5 V
VoltageAmplifier
Plate current
10.5 mA
VoltageAmplifier
Data set 06
1963 Philips Electron Tubes Handbook V1a
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Plate voltage
100 V
Plate current
11.8 mA
Maximum plate voltage
300 V
Maximum plate dissipation
2.75 W
Characteristic
Transconductance
3100 uS
Amplification factor
19.5
Plate resistance
6.25 kohm
Capacitance
Grid capacitance
1.8 pF
Plate capacitance
0.37 pF
Grid-plate capacitance
1.5 pF
Data set 07
1967 Mullard Receiving and Amplifying Valves
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristic
Plate Current
11.8 mA
EachSection;Va=100V
Transconductance
3100 uS
EachSection;Va=100V
Amplification Factor
19.5
EachSection;Va=100V
Plate Resistance
6250 ohm
EachSection;Va=100V
Plate Current
10.5 mA
EachSection;Va=250V
Transconductance
2200 uS
EachSection;Va=250V
Amplification Factor
17
EachSection;Va=250V
Plate Resistance
7700 ohm
EachSection;Va=250V
Other
Maximum Plate Voltage
300 V
Maximum Plate Dissipation
2.75 W
Data set 08
1968 Mazda Belvu
Published operating points and test conditions from this source.
SECTION 1
Triode
Application
Application
AF_Preamplifier text
Data set 09
1972 Philips Receiving Tubes
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Anode current I
10.5 mA
Transconductance S
2.2 mA/V
Heater voltage Ve 6.3
12.6 A
Heater current If 300
150 mA
Capacitance
Grid to all except anode Cg(a)
1.8 pF
Cg'(a”)
1.8 pF
Anode to all except grid Ca(g)
0.37 pF
Ca'(g")
0.25 pF
Anode to grid Cag
1.5 pF
Ca'g'
1.5 pF
Data set 10
1973 Mazda Valves Binder 2
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
300 mA
Nominal
Maximum Plate Voltage
300 V
Maximum Plate Dissipation
2.75 W
Maximum Cathode Current
20 mA
Characteristic
Transconductance
2200 µS
Typical
Amplification Factor
17
Typical
Plate Resistance
7700 ohm
Typical
Data set 11
1975 RCA RC30
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Plate Supply Voltage 100
250 V
Published in approved ECC82 target datasheet entry; Section1
Cathode-Bias Resistor 270
200 Ω
Published in approved ECC82 target datasheet entry; Section1
Plate Resistance (Approx.) 15000
10900 Ω
Published in approved ECC82 target datasheet entry; Section1
Transconductance 4000
5500 µS
Published in approved ECC82 target datasheet entry; Section1
Grid Voltage (Approx.) for plate current of 10 /iA —5
12 V
Published in approved ECC82 target datasheet entry; Section1
Plate Current 3.7
10 mA
Published in approved ECC82 target datasheet entry; Section1
Series 7 9.4
12.6 V
Published in approved ECC82 target datasheet entry; Section1
Parallel 3.5 4.7
6.3 V
Published in approved ECC82 target datasheet entry; Section1
Series 0.3 0.225
150 mA
Published in approved ECC82 target datasheet entry; Section1
Data set 12
1999 Philips E-Z
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Anode current I
10.5 mA
Anode current I 10.5 mA
Heater voltage \Z
12.6 V
Heater voltage \Z: 6.3 12.6 v
Heater current If
150 mA
Heater current If 300 150 mA
With V¢ applied to pins
9 V
With V¢ applied to pins 4+5 and 9 and the centre tap of the heater transformer
Grid to all except anode Cg(a)
1.8 pF
Grid to all except anode Cg(a) 1.8 pF
Anode to all except grid Ca(g)
0.37 pF
Anode to all except grid Ca(g) 0.37 pF
Anode to grid Cag
1.5 pF
Anode to grid Cag 1.5 pF
Characteristics
Transconductance S
2.2 mA/V
Transconductance S 2.2 mA/V
Amplification factor u
17 A
Amplification factor u 17 =
Data set 13
199X JJ
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Typical Plate Voltage
250 V
TypicalGridVoltage
-8.5 V
Typical Plate Current
10.5 mA
Characteristic
Grid Cathode Capacitance
1.9 pF
Plate Capacitance
1.9 pF
GridPlateCapacitance
1.63 pF
PlateCapacitanceSystem1
1.9 pF
Section1
PlateCapacitanceSystem2
1.8 pF
Section2
Data set 14
2026 Genalex Rebrand
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristic
Transconductance
1700 to 3000 µS
Plate 250 V; grid -8.5 V
Plate Current
8.8 to 12 mA
Plate 250 V; grid -8.5 V
Data set 15
2026 JJ Electronic
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Ik
20 mA
Published value
Characteristics
Ua
250 V
Published value
Ug
-8.5 V
Published value
Ia
10.5 mA
Published value
S
2200 µS
Published value
Ri
7.7 kΩ
Published value
µ
17
Published value
Capacitance
cg/k
1.9
Published value
ca
1.9
Published value
cg/a
1.63
Published value
Data set 16
2026 Mullard Rebrand
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristics
Heater current at 6.3 V
300 to 350 mA
Published min/max range
Heater current at 12.6 V
150 to 175 mA
Published min/max range