Tube-number record
AH221
0 archive entries
AH221 is a tube type in the TubeDatabase archive (class: Mercury Vapour Rectifier). Recorded specifications: brand English Electric Valve Company Limited, construction Rectifier, base Metal, socket Screw / Edison base, and maximum plate voltage 20000 V. The archive does not yet hold a photographed example of this type.
BrandEnglish Electric Valve Company Limited
ClassMercury Vapour Rectifier
BaseScrew / Edison base
Construction
Primary TypeRectifier
Rectifier TypeMercury Vapour
EnvelopeGlass
Base MaterialMetal
SectionsSingle
Filament / Heater
MaterialOxide coated
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Single phase full wave (20-40C mercury temp) | 7000 V | — | — | — | 1250 mA |
| Three phase full wave (20-40C mercury temp) | 8100 V | — | — | — | 1250 mA |
Application Notes
Requires minimum pre-heating time of 1 minute. Condensed mercury temperature must be controlled for optimal peak inverse voltage rating.
Datasheets
Datasheet: AH221.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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