30E7
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BrandMazda
ClassCathode Ray Tube
Base12 Contact Key Base (BS.448)
Filament4V @ 720mA
Construction
Primary TypeElectrostatic
Envelope12 inch Diameter
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated
Absolute Maximum Ratings
Plate Voltage4000 V
Audio Performance
Key Features
- Radio D.F. Compass scale
- Precision calibrated
- Medium persistence
- Absolute maximum ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical focusing | 2200V | - | - | - | - |
Application Notes
Precision constructed and calibrated instrument which provides bearings with an error not exceeding 1% at any point on the scale. The scale is graduated to correct for octantal error.
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