Data set 01
1951 Mullard Valve and Service Manual
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristic
Heater Voltage
6.3 V
Heater Current
600 mA
LowMicrophonyDesign
1 boolean
Voltage - Dual Triode (similar) ·Triode-Triode
ECC40
Medium-mu dual triode with separate cathodes intended for audio-frequency preamplifier service, providing two similar voltage-amplifying sections for low-level AF circuits.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- -
- Socket code
- B8A
- Base pins
- 8
- Nominal heater
- 6.3 V / 600 mA
Description
Dual triode with separate cathodes for audio-frequency preamplifier service.
Socket description
Rimlock 8-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- B8A
- Base pins
- 8
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 600 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
Terminal pinout
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
Section ratings
2 physical sections, each with unique specifications.
Section 1
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 11000 Ω
- Transconductance
- 0.0029 S
- Amplification factor
- 32
- Max plate voltage
- 300 V
- Max plate dissipation
- 1.5 W
- Max cathode current
- 10 mA
Triode section; values semantically promoted from published characteristics/maximum-ratings tables where present.
Section 2
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 11000 Ω
- Transconductance
- 0.0029 S
- Amplification factor
- 32
- Max plate voltage
- 300 V
- Max plate dissipation
- 1.5 W
- Max cathode current
- 10 mA
Second physical triode section; added to align rows with SectionCount.
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
1953 La Radiotechnique
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
DOUBLE TRIODE ECC 4O
4 ohm
Triode
Tension de l'anode
250 V
Triode
Tension de la grille
55 V
Triode
Courant anodique
6 mA
Triode
Resistance interne
11000 ohm
Triode
Tension de l'anode
300 V
Triode
Puissance dissipee sur l’anode
15 W
Triode
Courant cathodique
10 mA
Triode
Resistance du circuit de la grille Ra
1 Mohm
Triode
Resistance entre filament et cathode …. Rkf
15 Mohm
Triode
Tension entre filament et cathode Vkf
175 V
Triode
Capacitance
Capacite de la grille
28 pF
Triode
Capacite de l'anode
11 pF
Triode
Capacite grille-anode
28 pF
Triode
Capacite entre anodes
8 pF
Triode
Data set 03
1963 Philips Electron Tubes Handbook V1a
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Plate voltage
250 V
Plate current
6 mA
Maximum plate voltage
300 V
Maximum plate dissipation
1.5 W
Power output one section
0.28 W
ClassA
Power output push-pull
0.52 W
PushPull
Characteristic
Transconductance
2900 uS
Amplification factor
32
Plate resistance
11 kohm
Capacitance
Plate capacitance
1.1 pF
Grid capacitance
2.8 pF
Grid-plate capacitance
2.7 pF
Data set 04
1968 Mazda Belvu
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristics
Heater voltage
6.3 V
Published nominal value
Heater current
600 mA
Published nominal value
Transconductance
2700 µS
Published nominal or operating characteristic
Nominal plate current
6 mA
Per triode; Va=250 V
Other
Maximum plate dissipation
1.5 W
Published maximum rating
Data set 05
1999 Philips E-Z
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristics
Capacitances Cu
0.8 pF
Capacitances Cu = 1,1 pP Cg' =055 2F Cp5'<0,8 pF
Other
input voltage Vi
50 V
input voltage Vi 2 5 mV for an output of 50 mW of