30C9
0 Tubes in archive
BrandEDISWAN
ClassCathode Ray Tube
Base12-contact Key Base (BS.448)
Filament4V @ 720mA
Construction
Primary TypeElectrostatic CRT
EnvelopeGlass
SectionsSingle-gun
Filament / Heater
Heater NotesIndirectly heated
Absolute Maximum Ratings
Plate Voltage4000 V
Grid 2 Voltage500 V
Grid 1 Voltage-90 V
Audio Performance
Key Features
- 7 inch Screen Diameter
- Precision construction
- High beam current gun system
- Electrostatic focusing and deflection
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Measurement focus | 2200V | - | - | - | - |
Application Notes
The 30C9 is a precision constructed instrument for applications where the accuracy of the gun construction employed in compass tubes is required. The gun system is capable of providing high beam currents for pulse modulation of the grid.
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