Tube-number record
4CP7
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4CP7 is a tube type in the TubeDatabase archive (class: Cathode Ray Tube). Recorded specifications: brand Lansdale Tube Company, construction Magnetic focus and magnetic deflection, socket Duodecal, and maximum plate voltage 20000 V. The archive does not yet hold a photographed example of this type.
BrandLansdale Tube Company
ClassCathode Ray Tube
BaseDuodecal
Filament6.3 V @ 600 mA
Construction
Primary TypeMagnetic focus and magnetic deflection
EnvelopeGlass
Sections1
Filament / Heater
Absolute Maximum Ratings
Plate Voltage20000 V
Grid 1 Voltage-350 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Standard | 20000 V | — | — | — | 0.1 mA |
Application Notes
Anode and Grid #2 are connected together within the tube. Cathode should be returned to one side or the mid-tap of the heater transformer winding. Visual extinction of undeflected focused spot occurs between -70 and -110V.
Datasheets
Datasheet: 4CP7.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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