Tube-number record
LB 7/ T 5
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LB 7/ T 5 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
Filament4 V @ 1 mA
Construction
Primary TypeDisplay / CRT
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated oxide cathode
Absolute Maximum Ratings
Plate Voltage2000 V
Grid 2 Voltage400 V
Grid 1 Voltage-75 V
Audio Performance
Key Features
- Luftfahrtröhre (Aviation grade)
- Double electrostatic deflection
- Oxide cathode
- High vacuum
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Standard operation | 2000 V | — | — | — | — |
Application Notes
Implosion protection required. Aluminum shielding recommended for electrostatic fields, Mu-Metal for electromagnetic fields.
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