Tube-number record
D13-21
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BrandPHILIPS
ClassOscilloscope Tube
BaseDiheptal
Filament6.3 V @ 300 mA
Construction
Primary TypeDisplay / CRT
EnvelopeGlass
SectionsSingle gun
Filament / Heater
Heater NotesIndirect by A.C. or D.C.; parallel supply
Absolute Maximum Ratings
Plate Voltage12000 V
Plate Dissipation6 W
Grid 2 Voltage2100 V
Grid 1 Voltage-200 V
H-C Voltage200 V
Audio Performance
Key Features
- Flat face
- Post deflection acceleration
- Helical electrode
- Metal-backed screen
- High sensitivity
- High frequency
- High writing speed
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Post accelerator voltage 10kV | 10000 V | — | — | — | — |
Application Notes
The tube should not be supported by the base alone. A low impedance deflection plate drive is desirable if full deflection capabilities are used.
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