Tube-number record
CRM 91
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BrandMazda
ClassCathode Ray Tube
BaseOctal
Filament2 V @ 1400 mA
Construction
Primary TypeDisplay / CRT
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesHeater supply should be provided by a separate winding connected to the cathode.
Absolute Maximum Ratings
Plate Voltage6000 V
Audio Performance
Key Features
- Magnetically focused
- Magnetically deflected
- 9-inch screen
- Black and white picture
- High voltage operation
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Television Picture Reproduction | 5000 V | — | — | — | 0.15 mA |
Application Notes
Recommended anode voltage of 5,000V. A protective resistance of 25,000 ohms should be connected between the anode terminal and H.T. supply. Scanning power is proportional to anode voltage. Avoid mean anode voltage less than 4,500V for screen color considerations.
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