Tube-number record
DQ 71
0 archive entries
DQ 71 is a tube type in the TubeDatabase archive (class: Mercury-Vapour Rectifier Tube). Recorded specifications: brand Brown Boveri, construction Other / special, base Metal, socket Flexible / flying leads, and maximum plate voltage 26000 V. The archive does not yet hold a photographed example of this type.
BrandBrown Boveri
ClassMercury-Vapour Rectifier Tube
BaseFlexible / flying leads
Construction
Primary TypeOther / special
Rectifier TypeMercury-vapor
EnvelopeGlass
Base MaterialMetal
Sections1
Filament / Heater
MaterialOxide
Warm-up Time150s
Absolute Maximum Ratings
Plate Voltage26000 V
Cathode Current10000 mA
Audio Performance
Key Features
- Mercury-vapor filling
- Pellet filling
- Directly heated cathode
- High voltage rectifier
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Three-phase bridge (6 tubes) | 12400 V | — | — | — | 30000 mA |
| Double star (6 tubes) | 12400 V | — | — | — | 60000 mA |
Application Notes
Recommended for high-voltage rectifiers. Quadrature operation recommended for filament.
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