Tube-number record
6866
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BrandRCA
ClassDisplay Storage Tube
BaseSpecial / none
Filament6.3 V @ 600 mA
Construction
Primary TypeDisplay / CRT
EnvelopeGlass
Base MaterialSmall-Button Thirty-five-pin (JETEC E31-36)
SectionsWriting Section and Viewing Section
Filament / Heater
Heater NotesSeparate heaters for Writing and Viewing sections
Absolute Maximum Ratings
Plate Voltage14000 V
Grid 2 Voltage2750 V
H-C Voltage125 V
Audio Performance
Key Features
- Non-equilibrium writing
- Grid-control reading
- 4-inch diameter display
- Yellow phosphor (High-Visual-Efficiency Type)
- Aluminized screen
- Electrostatic focus and deflection
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Viewing Section | 10000 V | — | — | — | — |
Application Notes
The cathode of the Writing Gun is operated at approximately -2500V with respect to the Viewing Gun cathode (usually grounded). Magnetic shielding is required.
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