Tube-number record
E1C / 4671
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BrandPHILIPS
ClassUltra Short Wave Triode
BaseAcorn
Filament6.3 V @ 0.15 mA
Construction
Primary TypeTriode
EnvelopeAcorn
Sections1
Filament / Heater
Heater Notesindirect
Absolute Maximum Ratings
Plate Voltage180 V
Plate Dissipation1.5 W
Grid 1 Voltage-1.3 V
Cathode Current10 mA
H-C Voltage50 V
Audio Performance
Key Features
- Ultra short wave operation
- Acorn type
- Indirectly heated
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Characteristic 1 | 90 V | 1700 | 14700 | 25 | 2.5 mA |
| Typical Characteristic 2 | 135 V | 1900 | 13200 | 25 | 3.5 mA |
| Typical Characteristic 3 | 180 V | 2000 | 12500 | 25 | 4.5 mA |
Application Notes
The negative grid bias depends on the anode voltage at which the valve must oscillate. Without grid bias, the transmitter oscillates satisfactorily at 20 to 50V anode voltage.
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