Tube-number record
1P28
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1P28 is a tube type in the TubeDatabase archive (class: Multiplier Phototube). Recorded specifications: brand RCA, construction Multi-section, base Non-hygroscopic, socket Magnal, and maximum plate voltage 1250 V. The archive does not yet hold a photographed example of this type.
BrandRCA
ClassMultiplier Phototube
BaseMagnal
Construction
Primary TypeMulti-section
EnvelopeT-9
Base MaterialNon-hygroscopic
Sections9-Stage
Filament / Heater
Absolute Maximum Ratings
Plate Voltage1250 V
Grid 2 Voltage250 V
Cathode Current5 mA
Audio Performance
Key Features
- 9-Stage
- S-5 Response
- Ultraviolet sensitive down to 2000 angstroms
- High secondary-emission amplification
- Small DC dark current
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| 100 volts per dynode stage | 1000 V | — | — | 1000000 | — |
| 75 volts per dynode stage | 725 V | — | — | 150000 | — |
Application Notes
The IP28 is recommended for use in spectrophotometry, scintillation counters, and scientific research involving low ultraviolet radiation levels.
Datasheets
Datasheet: 1P28.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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