Tube-number record
DH 7-91
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DH 7-91 is a tube type in the TubeDatabase archive (class: Cathode Ray Tube). Recorded specifications: brand PHILIPS, construction Display / CRT, socket Loctal, maximum plate voltage 1500 V, and maximum plate dissipation 0.003 W. The archive does not yet hold a photographed example of this type.
BrandPHILIPS
ClassCathode Ray Tube
BaseLoctal
Filament6.3 V @ 550 mA
Construction
Primary TypeDisplay / CRT
EnvelopeGlass
SectionsSingle gun
Filament / Heater
Heater NotesIndirect heating by A.C. or D.C.; parallel supply
Absolute Maximum Ratings
Plate Voltage1500 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Symmetrical Operation | 1000 V | — | — | — | — |
Application Notes
For optimum focus with symmetrical operation, the average potentials of the deflection plates and g2,g4 should be equal. With asymmetrical operation the potential of any deflection plate should not differ from Vg2,g4 by more than the deflection voltage.
Datasheets
Datasheet: DH7-91.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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