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LB 2

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BrandTelefunken
ClassCathode Ray Tube
Base10-pin (Preßteller 10-stiftig)
Filament12.6V @ 270mA

Construction

Primary TypeCathode Ray Tube
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

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Normal Operation2000V---0.035mA

Application Notes

Requires protective housing against implosion and shielding from electromagnetic/electrostatic fields. Use Telefunken socket Lg.-Nr. 1771.

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