30E8
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BrandMazda
ClassCathode Ray Tube
Base12 contact Key Base (BS. 448)
Filament4V @ 720mA
Construction
Primary TypeCRT
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated
Absolute Maximum Ratings
Plate Voltage4000 V
Grid 2 Voltage1000 V
Audio Performance
Key Features
- Electrostatic deflection
- Precision compass scale
- Green (P1) phosphor
- Medium persistence
- Calibrated for octantal error
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Standard focus | 2200V | - | - | - | - |
Application Notes
Specifically designed for Radio D.F. Compass use. Bearings error not exceeding +/- 2 degrees.
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