ML-8139
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BrandMachlett
ClassDirect-View Storage Tube
BaseDual (E7-1 and E8-11)
Filament6.3V @ 600mA
Construction
Primary TypeDirect-View Storage Tube
EnvelopeGlass with Integral Magnetic Shield
Base MaterialPotting compound in shield
SectionsWrite Gun and Flood Gun
Filament / Heater
Heater NotesFlood and Write guns both use 6.3V heaters
Absolute Maximum Ratings
Plate Voltage10000 V
Plate Dissipation10 W
Grid 2 Voltage200 V
Grid 1 Voltage-125 V
Cathode Current2 mA
H-C Voltage180 V
Audio Performance
Key Features
- Bright visual displays
- Half-tone images
- Electrostatically focused write gun
- Magnetically deflected write beam
- Integral magnetic shield
- High-altitude operation
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Viewing Section | 8000V | - | - | - | - |
| Flood Gun | 80V | - | - | - | 2mA |
| Write Gun | -2500V | - | - | - | 1.5mA |
Application Notes
The tube features a useful storage time of approximately one minute. Useful screen diameter is 4 inches. Suitable for sea-level and high-altitude applications.
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