Tube-number record
ECF 1
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BrandPhilips
ClassTriode-Pentode
BaseSide-contact (P-base)
Filament6.3 V @ 200 mA
Construction
Primary TypeMulti-section
EnvelopeGlass
Sections2
Filament / Heater
Heater NotesIndirect heating by A.C. or D.C.; parallel or series supply
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation2 W
Grid 2 Voltage300 V
Grid 1 Voltage-1.3 V
H-C Voltage100 V
Audio Performance
Key Features
- Combined I.F. and L.F. amplifier
- Indirectly heated
- Parallel or series supply
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode section as H.F. or I.F. amplifier | 250 V | 2000 | 1600000 | — | 5 mA |
| Triode section | 150 V | 2200 | 9000 | 20 | 8 mA |
Datasheets
Datasheet: ECF1.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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