Tube-number record
DF 23
0 archive entries
DF 23 is a tube type in the TubeDatabase archive (class: Variable-mu pentode). Recorded specifications: brand Philips Miniwatt, year 1941, construction Pentode, socket Side-contact (P-base), maximum plate voltage 135 V, and maximum plate dissipation 0.5 W. The archive does not yet hold a photographed example of this type.
BrandPhilips Miniwatt
ClassVariable-mu pentode
BaseSide-contact (P-base)
Construction
Primary TypePentode
EnvelopeGlass
Sections1
Filament / Heater
MaterialTungsten
Absolute Maximum Ratings
Plate Voltage135 V
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 | — | — | 50 | 0.54 mA |
Application Notes
Variable-mu pentode designed for H.F., I.F., and L.F. amplification in battery-powered or mains-connected receivers.
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