1FP1
0 Tubes in archive
BrandTelefunken
ClassCathode-Ray Tube
BaseSmall-Button Unidekar 11-pin (E 11-22)
Filament6.3V @ 0.3mA
Construction
Primary TypeElectrostatic deflection and focus
EnvelopeGlass
Sections1
Filament / Heater
Heater NotesTolerance 10%
Absolute Maximum Ratings
Plate Voltage1500 V
Grid 1 Voltage-200 V
Cathode Current0.2 mA
H-C Voltage125 V
Audio Performance
Key Features
- Flat face
- Small filament power
- Single beam
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Operation at 500V Anode | 500V | - | - | - | - |
| Operation at 1000V Anode | 1000V | - | - | - | - |
Application Notes
All other dates correspond with the tube 1 EP 1.
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