DH 10-78
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BrandPhilips
ClassCathode Ray Tube
BaseDiheptal 12-pin
Filament6.3V @ 300mA
Construction
Primary TypeOscilloscope CRT
EnvelopeFlat-face screen
SectionsHelical post-acceleration electrode
Filament / Heater
Heater NotesIndirect by A.C. or D.C.; parallel supply
Absolute Maximum Ratings
Plate Voltage4000 V
Grid 2 Voltage2000 V
Grid 1 Voltage-100 V
H-C Voltage90 V
Audio Performance
Key Features
- Helical post-acceleration electrode
- Flat-face screen
- High deflection sensitivity
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Standard Post-Acceleration | 2000V | - | - | - | 0.0005mA |
| High Post-Acceleration | 4000V | - | - | - | 0.0005mA |
| High Sensitivity | 4000V | - | - | - | 0.0005mA |
Application Notes
The post-deflection acceleration helix is connected between g6 and the isolation shield g5. For optimum sharpness it may be desirable to apply a small potential difference between the y plates and the grids No.2 and 4.
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