Tube-number record
D 13-621
0 archive entries
D 13-621 is a tube type in the TubeDatabase archive (class: Oscilloscope Tube). Recorded specifications: brand Telefunken, construction Display / CRT, base Glass, socket 14-pin all-glass, and maximum plate voltage 2500 V. The archive does not yet hold a photographed example of this type.
BrandTelefunken
ClassOscilloscope Tube
Base14-pin all-glass
Filament6.3 V @ 300 mA
Construction
Primary TypeDisplay / CRT
EnvelopeFlat-faced screen
Base MaterialGlass
Sections1
Filament / Heater
Heater Notesindirectly, parallel operation
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Standard operation | 2000 V | — | — | — | — |
Application Notes
Service oscilloscopes
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