Tube-number record
LD 2
0 archive entries
BrandTelefunken
ClassSendetriode
BaseSpecial / none
Filament12.6 V @ 175 mA
Construction
Primary TypeTriode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesSeries heating of two tubes permitted. Replacement resistor: 70 Ohms.
Absolute Maximum Ratings
Plate Voltage800 V
Plate Dissipation12 W
Grid 1 Voltage-300 V
Cathode Current90 mA
H-C Voltage100 V
Audio Performance
Key Features
- Decimeter waves
- Bordbetrieb geeignet
- Self-excitation
- Frequency doubling
- Pulse operation capable
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Static Ruhepunkt | 175 V | — | — | — | 62.5 mA |
| Static Characteristic | 200 V | 9250 | — | 25 | 30 mA |
| Self-excitation (lambda=1m) | 300 V | — | — | — | 70 mA |
Application Notes
Grid bias recommended via cathode resistor to avoid damage from parasitic oscillations. Pulse duration < 10 microseconds for peak current ratings.
Datasheets
Datasheet: LD2.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
0 results