Tube-number record
AH238
0 archive entries
AH238 is a tube type in the TubeDatabase archive (class: Mercury Vapour Rectifier). Recorded specifications: brand English Electric Valve Co Ltd, construction Rectifier, base Metal/Ceramic, socket Screw / Edison base, and maximum plate voltage 13000 V. The archive does not yet hold a photographed example of this type.
BrandEnglish Electric Valve Co Ltd
ClassMercury Vapour Rectifier
BaseScrew / Edison base
Construction
Primary TypeRectifier
Rectifier TypeMercury Vapour
EnvelopeGlass
Base MaterialMetal/Ceramic
Sections1
Filament / Heater
MaterialOxide coated
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Single Phase Full Wave | 4500 V | — | — | — | 1250 mA |
| Single Phase Bridge | 9100 V | — | — | — | 1250 mA |
| Three Phase Half Wave | 5300 V | — | — | — | 1250 mA |
Application Notes
Condensed mercury temperature must be controlled; heating time is dependent on ambient temperature.
Datasheets
Datasheet: AH238.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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