Tube-number record
280A
0 archive entries
280A is a tube type in the TubeDatabase archive (class: Vacuum Tube). Recorded specifications: brand Western Electric, construction Rectifier, base Standard medium four-pin thrust type, socket 4-pin, and maximum plate voltage 3500 V. The archive does not yet hold a photographed example of this type.
BrandWestern Electric
ClassVacuum Tube
Base4-pin
Construction
Primary TypeRectifier
Rectifier TypeHalf-wave
EnvelopeGlass
Base MaterialStandard medium four-pin thrust type
SectionsSingle
Filament / Heater
MaterialThermionic
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Circuit A - Single Phase Half-Wave | 1000 V | — | — | — | 150 mA |
| Circuit B - Single Phase Double Half-Wave | 1000 V | — | — | — | 300 mA |
| Circuit G - Three Phase Double Y Interconnected | 1500 V | — | — | — |
Application Notes
Sufficient time must be allowed for filament temperature to reach operating value before anode potential is applied. Minimum 10 seconds. For temperatures below 20C, longer periods required (up to 12 minutes at 10C).
Datasheets
Datasheet: 280A.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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