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
950 mA
Voltage - Dual Triode (similar) ·Triode-Triode
ECC31
Medium-mu double triode with a common cathode, providing two similar sections for general voltage amplification and related receiving-equipment applications.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- -
- Socket code
- IO
- Base pins
- 8
- Nominal heater
- 6.3 V / 950 mA
Description
Double triode with common cathode; source publishes identical characteristics for each section.
Socket description
International Octal
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- IO
- Base pins
- 8
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 950 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
- 14000 Ω
- Transconductance
- 0.0023 S
- Amplification factor
- 32
Published Mullard ratings and characteristics promoted from the supplied source.
Section 2
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 14000 Ω
- Transconductance
- 0.0023 S
- Amplification factor
- 32
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.