908A
0 Tubes in archive
BrandRCA
ClassOscillograph Tube
BaseMedium 7-Pin
Filament2.5V @ 2100mA
Construction
Primary TypeCRT
EnvelopeGlass
Base MaterialPlastic
SectionsSingle
Filament / Heater
Heater NotesUnipotential Cathode
Absolute Maximum Ratings
Plate Voltage1500 V
Grid 2 Voltage1500 V
Grid 1 Voltage-125 V
Audio Performance
Key Features
- Electrostatic Focus
- Electrostatic Deflection
- Blue Fluorescence
- Short Persistence Phosphor
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Operation at 1000V Anode 2 | 1000V | - | - | - | - |
| Operation at 1500V Anode 2 | 1500V | - | - | - | - |
Application Notes
Brilliance and definition decrease with decreasing Anode No. 2 voltage; should not be less than 1000 volts.
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