Tube-number record
ND 4
0 archive entries
ND 4 is a tube type in the TubeDatabase archive (class: UKW-Sende-Triode). Recorded specifications: brand Telefunken, construction Triode, socket Special / none, maximum plate voltage 350 V, and maximum plate dissipation 12 W. The archive does not yet hold a photographed example of this type.
BrandTelefunken
ClassUKW-Sende-Triode
BaseSpecial / none
Filament12.6 V @ 180 mA
Construction
Primary TypeTriode
EnvelopeGlass
Sections1
Filament / Heater
Heater NotesIndirekt geheizt; Serienschaltung nur bei Einhaltung des Sollwertes zulässig.
Absolute Maximum Ratings
Plate Voltage350 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Static Characteristics | 200 V | 10000 | 3000 | 30 | 40 mA |
| Self-Excited Oscillator (1.0m) | 300 V | — | — | — | 90 mA |
| Self-Excited Oscillator (0.7m) | 250 V | — | — | — |
Application Notes
Zur Vermeidung von Störschwingungen ist die Gittervorspannung durch Widerstand in der Kathodenleitung und nicht durch Widerstand in der Gitterzuleitung zu erzeugen.
Datasheets
Datasheet: ND4.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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