Tube-number record
2V/561E
0 archive entries
2V/561E is a tube type in the TubeDatabase archive (class: Half-Wave Mercury-Vapour Rectifier). Recorded specifications: brand Standard Telephones and Cables Limited, construction Rectifier, base Metal, socket Special / none, and maximum plate voltage 20000 V. The archive does not yet hold a photographed example of this type.
BrandStandard Telephones and Cables Limited
ClassHalf-Wave Mercury-Vapour Rectifier
BaseSpecial / none
Construction
Primary TypeRectifier
Rectifier TypeMercury-Vapour
EnvelopeGlass
Base MaterialMetal
SectionsSingle
Filament / Heater
MaterialOxide-coated, shielded
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Single-Phase Full Wave (In Phase) | 6300 V | — | — | — | 42.5 mA |
| Three-Phase Half Wave (In Phase) | 9550 V | — | — | — | 18.75 mA |
Application Notes
After shipment or transit the valve must be pre-heated for not less than 30 minutes before any anode voltage is applied. Forced air cooling is recommended and is required for operation up to the limit of condensed mercury temperature.
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