Tube-number record
DF 23
0 Tubes in archive
BrandPhilips Miniwatt
ClassVariable-mu pentode
BaseSide-contact (P-base)
Construction
Primary TypePentode
EnvelopeGlass
Sections1
Filament / Heater
MaterialTungsten
Absolute Maximum Ratings
Plate Voltage135 V
Plate Dissipation0.5 W
Grid 2 Voltage135 V
Grid 1 Voltage-0.5 V
Cathode Current2 mA
Audio Performance
Typical THD0.56%
Key Features
- Variable-mu
- Battery operation
- Directly heated
- Low current consumption
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Fixed screen-grid voltage | 90 V | 580 | 2500000 | 20 | 0.65 mA |
| Fixed screen-grid voltage | 120 V | 650 | 2500000 | 20 | 1 mA |
| L.F. Amplifier (Vb=120V) | 120 V | — | — |
Application Notes
Variable-mu pentode designed for H.F., I.F., and L.F. amplification in battery-powered or mains-connected receivers.