Tube-number record
218
0 archive entries
218 is a tube type in the TubeDatabase archive (class: High-mu power triode). Recorded specifications: construction Triode, maximum plate voltage 750 V, and maximum plate dissipation 15 W. The archive does not yet hold a photographed example of this type.
ClassHigh-mu power triode
Construction
Primary TypeTriode
Envelopeglass
Sectionssingle
Filament / Heater
Materialthoriated tungsten
Absolute Maximum Ratings
Plate Voltage750 V
Plate Dissipation15 W
Audio Performance
Key Features
- High amplification factor
- Power triode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier | 750 V | — | — | 30 | 60 mA |
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