Data set 01
1958 Mullard Receiving Tubes
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristic
Heater Voltage
6.3 V
Heater Current
300 mA
Voltage - Dual Triode (similar) ·Triode-Triode
ECC70
Industrial twin triode intended for reliable amplifier and control service, providing paired sections for professional electronic equipment.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- -
- Socket code
- SUBMINIATURE8
- Base pins
- 8
- Nominal heater
- 6.3 V / 300 mA
Description
Subminiature medium-mu double triode for VHF service.
Socket description
Subminiature 8-lead base
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- SUBMINIATURE8
- Base pins
- 8
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 300 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
- 6500 Ω
- Transconductance
- 0.0054 S
- Amplification factor
- 35
- Max plate voltage
- 165 V
- Max plate dissipation
- 1.1 W
- Max cathode current
- 22 mA
Published ratings and characteristics promoted from the supplied Brimar source.
Section 2
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 6500 Ω
- Transconductance
- 0.0054 S
- Amplification factor
- 35
- Max plate voltage
- 165 V
- Max plate dissipation
- 1.1 W
- Max cathode current
- 22 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
1963 Mullard
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristics
Plate voltage
100 V
Grid voltage
-1 V
Plate current
6.5 mA
Transconductance
5.4 mA/V
Amplification factor
35
Other
Plate voltage maximum
165 V
Plate dissipation maximum
1.1 W
Cathode current maximum
22 mA
Capacitance
Inter-section plate capacitance shielded max
0.33 pF
Plate-grid capacitance each section shielded
1.4 pF
Input capacitance each section unshielded
2.4 pF
Application
Application
VHF amplifier / oscillator