D 13-621
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BrandTelefunken
ClassOscilloscope Tube
Base14-pin all-glass
Filament6.3V @ 300mA
Construction
Primary TypeDisplay / CRT
EnvelopeFlat-faced screen
Base MaterialGlass
Sections1
Filament / Heater
Heater Notesindirectly, parallel operation
Absolute Maximum Ratings
Plate Voltage2500 V
Grid 1 Voltage-200 V
H-C Voltage125 V
Audio Performance
Key Features
- Flat-faced screen
- High deflection sensitivity
- Single-beam
- Double-electrostatic symmetrical deflection
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Standard operation | 2000V | - | - | - | - |
Application Notes
Service oscilloscopes
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