Tube-number record
9HP7
0 archive entries
9HP7 is a tube type in the TubeDatabase archive (class: Cathode Ray Tube). Recorded specifications: brand Research Enterprises, Ltd., construction Display / CRT, socket Octal, and maximum plate voltage 7700 V. The archive does not yet hold a photographed example of this type.
BrandResearch Enterprises, Ltd.
ClassCathode Ray Tube
BaseOctal
Filament6.5 V @ 600 mA
Construction
Primary TypeDisplay / CRT
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesHeater voltage and heater current allowable variation +/- 10%
Absolute Maximum Ratings
Plate Voltage7700 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Condition 1 | 4000 V | — | — | — | — |
| Typical Condition 2 | 6000 V | — | — | — | — |
Application Notes
With heater negative, cathode should be connected to the mid-tap or to one side of the heater supply. Cut-off voltage is voltage necessary for visual extinction of stationary, focused spot.
Datasheets
Datasheet: 9HP7.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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