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
400 mA
Voltage - Dual Triode (similar) ·Triode-Triode
ECC35
High-gain double triode with separate cathodes, intended for paraphase audio-frequency voltage amplification and related low-level AF amplifier circuits.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- -
- Socket code
- IO
- Base pins
- 8
- Nominal heater
- 6.3 V / 400 mA
Description
High-gain double triode with separate cathodes for paraphase audio-frequency voltage amplifiers.
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
- 400 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
- 34000 Ω
- Transconductance
- 0.002 S
- Amplification factor
- 68
- Max plate voltage
- 300 V
- Max plate dissipation
- 1.5 W
- Max cathode current
- 8 mA
Published Mullard ratings and characteristics promoted from the supplied source.
Section 2
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 34000 Ω
- Transconductance
- 0.002 S
- Amplification factor
- 68
- Max plate voltage
- 300 V
- Max plate dissipation
- 1.5 W
- Max cathode current
- 8 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
250 V
Grid voltage
-2.5 V
Plate current
2.3 mA
Transconductance
2 mA/V
Amplification factor
68
Other
Plate voltage maximum
300 V
Plate dissipation maximum
1.5 W
Cathode current maximum
8 mA
Capacitance
Inter-section plate capacitance
0.75 pF
Plate-grid capacitance
2.5 pF
Input capacitance
3 pF
Output capacitance section 1
1 pF
Output capacitance section 2
1.3 pF
Application
Application
Paraphase AF voltage amplifier