Tube-number record
AH238
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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
Warm-up Time60s
Absolute Maximum Ratings
Plate Voltage13000 V
Cathode Current1250 mA
Audio Performance
Key Features
- Hot cathode
- Mercury Vapour
- High voltage
- Vertical mounting
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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