DH 7-78
0 Tubes in archive
BrandPhilips
ClassCathode Ray Tube
Base40467
Filament6.3V @ 300mA
Construction
Primary TypeOscilloscope CRT
EnvelopeFlat face, helical post-acceleration electrode
SectionsSingle beam
Filament / Heater
Absolute Maximum Ratings
Plate Voltage5000 V
Plate Dissipation6 W
Grid 2 Voltage1600 V
Grid 1 Voltage-200 V
H-C Voltage200 V
Audio Performance
Key Features
- Flat face
- Helical post-acceleration
- Electrostatic focusing
- Double electrostatic deflection
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Post-acceleration 4000V | 4000V | - | - | - | 0.01mA |
| Post-acceleration 1200V | 1200V | - | - | - | 0.01mA |
Application Notes
The socket should under no circumstances be used to support the tube. Isolation shield voltage variation serves to correct pincushion and barrel pattern distortion.
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