9MP7
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BrandResearch Enterprises, Ltd.
ClassCathode Ray Tube
Base8 Pin Octal
Filament6.3V @ 600mA
Construction
Primary TypeMagnetic focusing, Magnetic deflection
EnvelopeJ72R2
Base MaterialMetal Shell
SectionsSingle
Filament / Heater
Heater NotesAllowable heater variation 10%
Absolute Maximum Ratings
Plate Voltage7700 V
Grid 2 Voltage330 V
H-C Voltage125 V
Audio Performance
Key Features
- Magnetic Focusing
- Magnetic Deflection
- High Vacuum
- Metal Base Shell
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation 1 | 4000V | - | - | - | - |
| Typical Operation 2 | 6000V | - | - | - | - |
Application Notes
Grid #2 may or may not be present; socket should be wired to accommodate it. Cut-off voltage is visual extinction of a stationary focused spot.
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