Tube-number record
ECF 8070
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ECF 8070 is a tube type in the TubeDatabase archive (class: Triode / Pentode). Recorded specifications: brand TELEFUNKEN, construction Multi-section, base Glass, socket Noval (B9A), maximum plate voltage 250 V, and maximum plate dissipation 2 W. The archive does not yet hold a photographed example of this type.
BrandTELEFUNKEN
ClassTriode / Pentode
BaseNoval (B9A)
Filament6.3 V @ 380 mA
Construction
Primary TypeMulti-section
EnvelopeGlass
Base MaterialGlass
Sections2
Filament / Heater
Heater NotesDC-AC-heating connected in parallel
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation2 W
Grid 2 Voltage150 V
Cathode Current18 mA
H-C Voltage100 V
Audio Performance
Key Features
- Reliability
- Long life
- Tight tolerances
- Cathode free from interface
- Special cathode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode (Measuring Values) | 100 V | 5500 | — | 17 | 12 mA |
| Pentode (Measuring Values) | 170 V | 12000 | 350000 | 70 | 10 mA |
| Triode as Oscillator | 190 V | 3500 | 8200 | — | 12 mA |
| Pentode as IF-amplifier | 170 V | 12000 | 350000 | — | 10 mA |
Application Notes
The guaranteed life applies only if the filament voltage is kept in the limits of +/- 5% absolute.
Datasheets
Datasheet: ECF8070.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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