Tube-number record
417
0 archive entries
417 is a tube type in the TubeDatabase archive (class: High-Gm Triode). Recorded specifications: construction Triode, socket Noval (B9A), maximum plate voltage 200 V, and maximum plate dissipation 4.5 W. The archive does not yet hold a photographed example of this type.
ClassHigh-Gm Triode
BaseNoval (B9A)
Filament6.3 V @ 0.3 mA
Construction
Primary TypeTriode
EnvelopeGlass
Sections1
Filament / Heater
Absolute Maximum Ratings
Plate Voltage200 V
Plate Dissipation4.5 W
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A | 150 V | 25000 | 1700 | 43 | 25 mA |
Application Notes
Commonly used in broadband amplifiers and low-noise input stages.
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