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BrandDuMont
ClassMultiplier Phototube
BaseB14-38
Construction
Primary TypeMultiplier Phototube
EnvelopeGlass
Base MaterialMedium-shell diheptal
Sections10-stage
Filament / Heater
Absolute Maximum Ratings
Plate Voltage1250 V
Plate Dissipation0.5 W
Audio Performance
Key Features
- 10 stage multiplier
- End-window type
- Predominantly sensitive to visible radiation
- Spectral response S9
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| 105 volts per stage | 1050V | - | - | 215000 | - |
| 145 volts per stage | 1450V | - | - | 2500000 | - |
Application Notes
The cathode current must be kept well below the peak value to satisfy maximum ratings on anode current and maintain linearity.
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