Data set 01
1959 Telefunken
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
ECC808
High-gain twin triode intended for low-frequency voltage amplification, providing two similar high-mu sections for sensitive AF and general small-signal circuits.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- -
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 6.3 V / 300 mA
Description
High-gain dual triode intended for low-frequency voltage amplification.
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
- 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
- Transconductance
- 0.0016 S
- Amplification factor
- 100
- Max plate voltage
- 300 V
- Max plate dissipation
- 0.5 W
- Max cathode current
- 4 mA
Published Telefunken ratings and characteristics promoted from the supplied source.
Section 2
Triode
X-ray radiationInterelectrode capacitances
- Transconductance
- 0.0016 S
- Amplification factor
- 100
- Max plate voltage
- 300 V
- Max plate dissipation
- 0.5 W
- Max cathode current
- 4 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
340 mA
Published nominal value
Transconductance
1600 µS
Published nominal or operating characteristic
Nominal plate current
1.2 mA
Per triode; Va=250 V
Other
Maximum plate dissipation
0.5 W
Published maximum rating