Tube-number record
DQ 51C/DQ 51D
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BrandBrown Boveri
ClassMercury-Vapour Rectifier
Construction
Primary TypeRectifier
Rectifier TypeHalf-wave
EnvelopeGlass
Sections1
Filament / Heater
MaterialOxide-coated
Warm-up Time60s
Absolute Maximum Ratings
Plate Voltage22000 V
Cathode Current2500 mA
Audio Performance
Power Output79000 W
Key Features
- Directly heated cathode
- Mercury-vapour filling
- High-voltage applications
- Multiple base options (DQ 51, 51b, 51c, 51d)
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Three-phase half-wave (3 tubes) | 22000 V | — | — | — | 2500 mA |
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