Tube-number record
ACORN PENTODE
0 archive entries
ACORN PENTODE is a tube type in the TubeDatabase archive (class: Pentode). Recorded specifications: brand Mullard, construction Pentode, socket Acorn, and maximum plate voltage 250 V. The archive does not yet hold a photographed example of this type.
BrandMullard
ClassPentode
BaseAcorn
Filament4 V @ 1 mA
Construction
Primary TypePentode
EnvelopeAcorn
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage250 V
Grid 2 Voltage100 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| R.F. Amplifier | 250 V | 1400 | 3500000 | — | 2 mA |
| Anode Detector | 250 V | — | 250000 | — | 0.1 mA |
Application Notes
The AP4 is an Acorn type specially designed for operation at ultra high frequencies up to 430 Mc. Use necessitates special precautions in circuit design: earth return leads must be kept short and commoned in the cathode circuit.
0 results