WE18
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BrandPhilips / Telefunken
ClassVariable-mu AF Pentode with Tuning Indicator
BaseSide-contact (contatti laterali)
Filament6.3V @ 200mA
Construction
Primary TypePentode / Tuning Indicator
EnvelopeGlass (Vetro)
SectionsSingle section with indicator
Filament / Heater
Heater NotesIndirect heating
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation0.3 W
Grid 2 Voltage300 V
Grid 1 Voltage-1.3 V
Cathode Current3 mA
H-C Voltage100 V
Audio Performance
Typical THD1.1%
Key Features
- Variable-mu (mu variabile)
- Cathode ray tuning indicator
- Quick heating cathode (catodo a riscaldamento rapido)
- Sliding screen voltage principle (tensione di schermo mobile)
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| AF Amplifier | 250V | - | 800000 | 70 | 1mA |
Application Notes
Designed for low-frequency amplification with the ability to control sensitivity via CAV (AGC) without causing cross-modulation distortion in earlier stages. The variable screen voltage is used to drive the tuning indicator deflector rods.
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