ECF801
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BrandPhilips
ClassTriode-Pentode
BaseNoval
Filament6.3V @ 0.41mA
Construction
Primary TypeCombined high slope FRAME GRID TRIODE AND R.F. PENTODE
EnvelopeGlass
Sections2
Filament / Heater
Heater NotesIndirect heating by A.C. or D.C.; parallel supply
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation2 W
Grid 2 Voltage250 V
Grid 1 Voltage50 V
Cathode Current18 mA
H-C Voltage100 V
Audio Performance
Key Features
- Frame Grid
- High slope
- Frequency changer
- V.H.F. television tuners
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode section | 170V | 11000 | 350000 | 55 | 10mA |
| Triode section | 100V | 9000 | - | 20 | 15mA |
Application Notes
Specifically designed for use as a frequency changer in V.H.F. television tuners. Heater to cathode voltage should not exceed 100V RMS to fulfill modulation hum requirements.
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