Tube-number record
9HP7
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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
Grid 2 Voltage330 V
H-C Voltage125 V
Audio Performance
Key Features
- Magnetic Focusing
- Magnetic Deflection
- P7 Phosphor
- Medium Metal Bulb Contact
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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