Tube-number record
B 13 85
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BrandVVB-RFT
ClassOscilloscope Tube
Base10-pin
Filament6.3 V @ 375 mA
Construction
Primary TypeOther / special
EnvelopeGlass
Base MaterialPlastic/Metal pins
Sections1
Filament / Heater
Heater NotesCurrent range 300 mA to 450 mA
Absolute Maximum Ratings
Plate Voltage8000 V
Grid 2 Voltage4000 V
Grid 1 Voltage-200 V
Cathode Current0.2 mA
H-C Voltage180 V
Audio Performance
Key Features
- Planschirm (Flat screen)
- Nachbeschleunigung (Post-acceleration)
- Symmetrische Ablenkung (Symmetrical deflection)
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Standard Post-Acceleration | 4000 V | — | — | — | — |
Application Notes
Wideband oscilloscope tube with side-mounted deflection plate connectors.
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