Tube-number record
12Ж8
0 archive entries
12Ж8 is a tube type in the TubeDatabase archive (class: High-frequency Pentode). Recorded specifications: brand USSR, construction Pentode, base Metal, socket Octal, maximum plate voltage 330 V, and maximum plate dissipation 2.8 W. The archive does not yet hold a photographed example of this type.
BrandUSSR
ClassHigh-frequency Pentode
BaseOctal
Filament12.6 V @ 150 mA
Construction
Primary TypePentode
EnvelopeMetal
Base MaterialMetal
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated cathode
Absolute Maximum Ratings
Plate Voltage330 V
Plate Dissipation2.8 W
Grid 2 Voltage140 V
H-C Voltage100 V
Audio Performance
Key Features
- Short characteristic curve
- Indirectly heated oxide-coated cathode
- Vibration resistant up to 6g
- Designed for intermediate and high frequency amplification
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Amplifier | 250 V | 1650 | — | — | 3 mA |
0 results