Tube-number record
205D
0 archive entries
205D is a tube type in the TubeDatabase archive (class: Moderate power, filamentary triode). Recorded specifications: brand Western Electric, construction Triode, socket 4-pin, maximum plate voltage 400 V, and maximum plate dissipation 14 W. The archive does not yet hold a photographed example of this type.
BrandWestern Electric
ClassModerate power, filamentary triode
Base4-pin
Construction
Primary TypeTriode
EnvelopeGlass
SectionsSingle
Filament / Heater
MaterialOxide-coated
Absolute Maximum Ratings
Plate Voltage400 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A | 200 V | 1840 | 4000 | 7.4 | 22.5 mA |
| Class A | 250 V | 1160 | 6000 | 6.9 | 9 mA |
| Class A | 300 V | 1830 | 4000 | 7.3 | 25 mA |
Application Notes
The filament is designed to operate on a voltage basis. When using AC supply, grid and plate returns should connect to a center tap. For frequencies above 15 MHz, ratings should be reduced.
Datasheets
Datasheet: 205D.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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