Tube-number record
4471
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BrandRadio Corporation of America
ClassPhotomultiplier Tube
Construction
Primary TypeOther / special
EnvelopeLime-glass
Sections9-stage
Filament / Heater
Absolute Maximum Ratings
Plate Voltage1000 V
Audio Performance
Key Features
- Controlled sensitivity above 5800 Angstroms
- Side-on type
- High red region sensitivity
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Multiplier Phototube | 1000 V | — | — | — | — |
Application Notes
The 4471 is same as 931A except for controlled sensitivity in the red region. Luminous sensitivity is measured with a tungsten-filament lamp at 2870K.
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