Tube-number record
LB 2
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BrandTelefunken
ClassCathode Ray Tube
Base10-pin
Filament12.6 V @ 270 mA
Construction
Primary TypeDisplay / CRT
EnvelopeGlass (4mm safety glass)
SectionsSingle
Filament / Heater
MaterialOxydkathode
Heater NotesVoltage range 11 to 15.5 V permitted
Absolute Maximum Ratings
Plate Voltage2000 V
Grid 2 Voltage325 V
Grid 1 Voltage-50 V
Cathode Current0.035 mA
Audio Performance
Key Features
- Electromagnetic-electrostatic polar coordinate recording
- Integrated ring capacitor
- Luftfahrtrohre (Aviation tube)
- Safety glass protected screen
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Normal Operation | 2000 V | — | — | — | 0.035 mA |
Application Notes
Requires protective housing against implosion and shielding from electromagnetic/electrostatic fields. Use Telefunken socket Lg.-Nr. 1771.
Datasheets
Datasheet: LB2.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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