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Tube Database (7,341 tube types · 1,270 archive entries)

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LB 2 vacuum tube outline illustration

Tube-number record

LB 2

0 archive entries

LB 2 is a tube type in the TubeDatabase archive (class: Cathode Ray Tube). Recorded specifications: brand Telefunken, construction Display / CRT, socket 10-pin, and maximum plate voltage 2000 V. The archive does not yet hold a photographed example of this type.

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

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Normal Operation2000 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

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Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.

Filters

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Manufacturers

Brands

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    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