Tube-number record
8857/V1, 8857/V2, 8858
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BrandRCA
ClassImage Intensifier Tubes
BaseSpecial / none
Construction
Primary TypeElectrostatic Focus
EnvelopeFiber-Optic Faceplates
SectionsSingle Stage
Filament / Heater
Absolute Maximum Ratings
Plate Voltage13000 V
Cathode Current0.00025 mA
Audio Performance
Key Features
- Extended red response
- Fiber-optic input and output faceplates
- Flat circular image surface
- Yellow-Green fluorescence
- Medium to Medium Short persistence
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Anode Operation | 12000 V | — | — | — | — |
Application Notes
Image intensifiers for low-light applications. Type 8858 includes integral oscillator/power supply for operation from low voltage DC source.
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