Tube-number record
7AMP
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BrandDu Mont
ClassCathode-Ray Tube
BaseCRT base (B12 family)
Filament6.3 V @ 600 mA
Construction
Primary TypeDisplay / CRT
EnvelopeGlass
Base MaterialMedium Shell Diheptal
Sections2
Filament / Heater
Heater NotesHeater current tolerance +/- 10%
Absolute Maximum Ratings
Plate Voltage11500 V
Plate Dissipation6 W
Grid 2 Voltage3850 V
Grid 1 Voltage-200 V
H-C Voltage180 V
Audio Performance
Key Features
- 7-inch diagonal square face
- Two beam
- Electrostatic deflection
- Electrostatic focus
- Post accelerator
- Separate connections for astigmatism control
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation | 4000 V | — | — | — | — |
Application Notes
The two second anodes and the shield, normally tied together, have separate connections for astigmatism control and special applications. The deflection electrode and acceleration electrode connections are brought out through the bulb wall to minimize lead inductance.
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