Tube-number record
408A
0 archive entries
408A is a tube type in the TubeDatabase archive (class: RF Pentode). Recorded specifications: brand Sylvania, construction Pentode, base Miniature Button, socket Miniature 7-pin (B7G), maximum plate voltage 180 V, and maximum plate dissipation 1.7 W. The archive does not yet hold a photographed example of this type.
BrandSylvania
ClassRF Pentode
BaseMiniature 7-pin (B7G)
Filament20 V @ 50 mA
Construction
Primary TypePentode
EnvelopeMiniature
Base MaterialMiniature Button
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage180 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier | 120 V | 5000 | 340000 | — | 7 mA |
Application Notes
Designed for reliable service under conditions encountered in communication applications.
Datasheets
Datasheet: 408A.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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