8SP7
0 Tubes in archive
BrandGeneral Electric
ClassCathode Ray Tube
BaseB25-139
Filament6.3V @ 0.6mA
Construction
Primary TypeElectrostatic Focus and Deflection
EnvelopeGlass
SectionsDual Beam (2 Guns)
Filament / Heater
Heater NotesRatings are per gun
Absolute Maximum Ratings
Plate Voltage6000 V
Plate Dissipation6 W
Grid 2 Voltage3000 V
Grid 1 Voltage-200 V
H-C Voltage180 V
Audio Performance
Key Features
- Dual Beam
- Electrostatic Focus
- Electrostatic Deflection
- Post Acceleration
- Aluminized
- Spherical Faceplate
- Long Persistence
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Post Accelerator Operation | 6000V | - | - | - | - |
Application Notes
The 8SP7 is an 8-inch dual beam cathode ray tube for sonar and oscillographic applications.
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