Tube-number record
278
0 archive entries
278 is a tube type in the TubeDatabase archive (class: Pentode). Recorded specifications: construction Pentode, socket 6-pin, and maximum plate voltage 250 V. The archive does not yet hold a photographed example of this type.
ClassPentode
Base6-pin
Filament6.3 V @ 0.3 mA
Construction
Primary TypePentode
EnvelopeST-12
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated cathode
Absolute Maximum Ratings
Plate Voltage250 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier | 250 V | 1450 | 800000 | — | 7 mA |
Application Notes
Used primarily as a radio-frequency amplifier and intermediate-frequency amplifier in AC receivers.
0 results