Tube-number record
B40M/1
0 archive entries
B40M/1 is a tube type in the TubeDatabase archive (class: Cathode Ray Tube (CRT)). Recorded specifications: brand FERNSEH GmbH, construction Display / CRT, and maximum plate voltage 12000 V. The archive does not yet hold a photographed example of this type.
BrandFERNSEH GmbH
ClassCathode Ray Tube (CRT)
Construction
Primary TypeDisplay / CRT
EnvelopeGlass
Sections1
Filament / Heater
MaterialOxide
Absolute Maximum Ratings
Plate Voltage12000 V
Grid 1 Voltage-100 V
Cathode Current0.1 mA
Audio Performance
Key Features
- Directly heated oxide cathode
- High vacuum
- Double magnetic deflection
- Magnetic focusing
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Deflection / Focusing | 12000 V | — | — | — | — |
Application Notes
Vorläufige technische Daten (Preliminary technical data). Minimum/Maximum heater current 1.6 - 1.8 A allowed.
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