Tube-number record
DG 7-78
0 archive entries
DG 7-78 is a tube type in the TubeDatabase archive (class: Cathode Ray Tube). Recorded specifications: brand Philips, construction Display / CRT, base Glass, socket Duodecal, and maximum plate voltage 2800 V. The archive does not yet hold a photographed example of this type.
BrandPhilips
ClassCathode Ray Tube
BaseDuodecal
Construction
Primary TypeDisplay / CRT
EnvelopeGlass
Base MaterialGlass
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage2800 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Oscillograph Operation | 1200 V | — | — | — | — |
Application Notes
The Vg4 ring voltage is set at 700V. High sensitivity focus lens sensitive to eccentricities. Phosphor coating requires rapid drying to avoid thick binding layers.
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