DH 3-91
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BrandPhilips
ClassCathode-Ray Tube
BaseLoctal 8-pin
Filament6.3V @ 550mA
Construction
Primary TypeOscilloscope Tube
EnvelopeGlass
Sections1
Filament / Heater
Heater NotesIndirect by A.C. or D.C. parallel supply
Absolute Maximum Ratings
Plate Voltage1000 V
Plate Dissipation0.002 W
Grid 1 Voltage100 V
H-C Voltage250 V
Audio Performance
Key Features
- Automatic focus
- Transparent conducting film to prevent electrostatic body effect
- Low-voltage accelerator (500V)
- Double electrostatic deflection
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Visual extinction focused spot | 500V | - | - | - | - |
Application Notes
Primarily intended for indicating purposes and monitoring. Features a transparent conducting film between the phosphor and faceplate, connected to the accelerator, allowing operation with cathode at earth potential without electrostatic body effect.
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