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
450 mA
Application
Cascode oscillator wideband amplifier
InternalScreening
Voltage - Dual Triode (similar) ·Triode-Triode
ECC8100
Special-purpose professional twin triode designed for reliable amplifier or control service, with paired sections intended for demanding industrial electronic equipment.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- -
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 6.3 V / 330 mA
Description
Twin triode with separate cathodes and internal screening for cascode circuits, oscillators, and wideband amplifiers.
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
- 330 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
- 1875 Ω
- Transconductance
- 0.016 S
- Amplification factor
- 30
- Max plate voltage
- 250 V
- Max plate dissipation
- 2.5 W
- Max cathode current
- 40 mA
Published Telefunken ratings and characteristics promoted from the supplied source. Telefunken ECC8100 triode system I, internally screened between anode and grid for cascode, wideband amplifier and oscillator operation. Typical gm 16 mA/V, μ 30; plate resistance 1875 Ω calculated as μ/gm, not an independent measurement. Per-system maximum anode 250 V, plate dissipation 2.5 W, cathode current 40 mA. System I heater-to-cathode maximum 50 V; capacitances published.
Section 2
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 1500 Ω
- Transconductance
- 0.02 S
- Amplification factor
- 30
- Max plate voltage
- 250 V
- Max plate dissipation
- 2.5 W
- Max cathode current
- 40 mA
Second physical triode restored. Telefunken ECC8100 triode system II; electrically distinct from internally screened system I. Typical gm 20 mA/V, μ 30; plate resistance 1500 Ω calculated as μ/gm, not an independent measurement. Per-system maximum anode 250 V, plate dissipation 2.5 W, cathode current 40 mA. System II heater-to-cathode maximum 120 V; capacitances published.
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.