Tube-number record
30B1
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BrandEdiswan
ClassCathode Ray Tube
BaseCRT base (B12 family)
Filament4 V @ 720 mA
Construction
Primary TypeDisplay / CRT
EnvelopeGlass
Sections1
Filament / Heater
Heater NotesIndirectly heated
Absolute Maximum Ratings
Plate Voltage6000 V
Grid 2 Voltage1000 V
Grid 1 Voltage2500 V
Audio Performance
Key Features
- Polished flat face
- High grade precision measurement
- Medium persistence green phosphor (P1)
- Bulb coating brought out separately
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Va3=2000V Operation | 2000 V | — | — | — | 0.02 mA |
| Va3=3000V Operation | 3000 V | — | — | — | 0.02 mA |
| Va3=5000V Operation | 5000 V | — | — | — | 0.02 mA |
Application Notes
Final Anode and Bulb coating are brought out separately to enable a finer spot or higher writing speed by increasing Final Anode voltage above Anode 1 limit. Normally joined in use.
Datasheets
Datasheet: 30B1.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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