EF 12
0 Tubes in archive
BrandPhilips
ClassPentode
BaseY
Filament6.3V @ 0.2mA
Construction
Primary TypePentode
EnvelopeMetal
SectionsSingle
Filament / Heater
Heater Notesindirect by A.C. or D.C.
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation1.5 W
Grid 2 Voltage125 V
Grid 1 Voltage-1.3 V
Cathode Current10 mA
H-C Voltage100 V
Audio Performance
Key Features
- Low microphony
- Steel tube base
- A.C./D.C. supply compatible
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| R.F. or I.F. amplifier | 250V | 2100 | 2000000 | 25 | 3mA |
| R.F. or I.F. amplifier | 200V | 2100 | 1500000 | 25 | 3mA |
| R.F. or I.F. amplifier | 100V | 2100 | 400000 | 25 | 3mA |
Application Notes
For use as R.F., I.F., or A.F. amplifier. Triode connection possible by connecting screen grid to anode (max plate voltage 200V).
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