Tube-number record
705A
0 archive entries
705A is a tube type in the TubeDatabase archive (class: Half-Wave High-Vacuum Rectifier). Recorded specifications: brand Standard Telephones and Cables Limited, construction Rectifier, base B4A, socket Special / none, maximum plate voltage 30000 V, and maximum plate dissipation 60 W. The archive does not yet hold a photographed example of this type.
BrandStandard Telephones and Cables Limited
ClassHalf-Wave High-Vacuum Rectifier
BaseSpecial / none
Construction
Primary TypeRectifier
Rectifier TypeVacuum
EnvelopeGlass
Base MaterialB4A
Sections1
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Bi-phase half wave (2 valves) | 9000 V | — | — | — | 200 mA |
| Full wave (4 valves) | 18000 V | — | — | — | 200 mA |
Application Notes
For use in ideal choke-input filter circuits. Ratings vary based on Peak Inverse Voltage (PIV).
Datasheets
Datasheet: 705A.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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