Tube-number record
274A
0 archive entries
274A is a tube type in the TubeDatabase archive (class: Rectifier). Recorded specifications: brand Western Electric, construction Rectifier, base Medium four-pin thrust, socket 4-pin, and maximum plate voltage 660 V. The archive does not yet hold a photographed example of this type.
BrandWestern Electric
ClassRectifier
Base4-pin
Construction
Primary TypeRectifier
Rectifier TypeThermionic high vacuum
EnvelopeGlass
Base MaterialMedium four-pin thrust
Sections2
Filament / Heater
MaterialFilament type
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Choke-Input Filter | 550 V | — | — | — | 160 mA |
| Choke-Input Filter (Maximum) | 550 V | — | — | — | 200 mA |
| Choke-Input Filter (Maximum) | 660 V | — | — | — | 160 mA |
Application Notes
The choke-input filter is preferred over the condenser-input filter for better regulation and longer tube life. Maximum input capacitance for condenser-input filters should not exceed 4 microfarads.
Datasheets
Datasheet: 274A.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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