7909
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BrandWestinghouse
ClassMultiplier Phototube
BasePotted Flexible Leads
Construction
Primary Type10-stage multiplier phototube
Envelope7/8" diameter flat end-window
Base MaterialPotted
Sections10-stage
Filament / Heater
Absolute Maximum Ratings
Plate Dissipation0.5 W
Cathode Current0.01 mA
Audio Performance
Key Features
- 3/4" diameter photocathode
- 10-stage multiplier
- Integral potted voltage-divider resistor network
- Compact design
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| 105 Volts per stage operation | 1050V | - | - | 150000 | - |
Application Notes
The type 7909 incorporates an integral, potted voltage-divider resistor network to achieve maximum compactness of associated equipment. The cathode current is limited by cathode resistance to maintain linear function.
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