Tube-number record
LD 5
0 archive entries
LD 5 is a tube type in the TubeDatabase archive (class: Sendetriode). Recorded specifications: brand Telefunken, construction Triode, socket Special / none, maximum plate voltage 500 V, and maximum plate dissipation 25 W. The archive does not yet hold a photographed example of this type.
BrandTelefunken
ClassSendetriode
BaseSpecial / none
Filament12.6 V @ 0.24 mA
Construction
Primary TypeTriode
SectionsSingle
Filament / Heater
Heater NotesSeries heating of two tubes permissible. A resistor of 53 Ohms + 5% can be used as a replacement.
Absolute Maximum Ratings
Plate Voltage500 V
Plate Dissipation
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| CW Self-excited (35 cm) | 300 V | 12000 | — | 15.4 | 100 mA |
| CW Self-excited (40 cm) | 430 V | 12000 | — | — | 100 mA |
| CW Driven (>2 m) | 500 V | 12000 | — | — | 100 mA |
Application Notes
Temp of bulb must not exceed 300C; socket cap must stay below 140C. Forced air cooling required in closed housings.
Datasheets
Datasheet: LD5.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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