Data set 01
1960 Mazda
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Maximum heater-cathode voltage
150 V
Capacitance
Input capacitance
3.3 pF
Output capacitance
3 pF
Anode-grid capacitance
1.8 pF
Voltage - Dual Triode (similar) ·Triode-Triode
ECC812
Industrial twin triode intended for reliable professional amplifier and control applications, providing two triode sections for specialized electronic equipment.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- -
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 6.3 V / 430 mA
Description
High-slope dual triode designed for chrominance-output stages in color television receivers.
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
- -
- Socket code
- B9A
- Base pins
- 9
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 430 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
- Transconductance
- 0.01 S
- Amplification factor
- 58
- Max plate voltage
- 300 V
- Max plate dissipation
- 1.5 W
- Max cathode current
- 15 mA
Representative section for repeated identical sections.
Section 2
Triode
X-ray radiationInterelectrode capacitances
- Transconductance
- 0.01 S
- Amplification factor
- 58
- Max plate voltage
- 300 V
- Max plate dissipation
- 1.5 W
- Max cathode current
- 15 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
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
430 mA
Published nominal value
Transconductance
10500 µS
Published nominal or operating characteristic
Nominal plate current
9 mA
Per section; Va=100 V
Other
Maximum plate dissipation
1.5 W
Published maximum rating