Tube-number record
4 TP
0 archive entries
4 TP is a tube type in the TubeDatabase archive (class: Cathode-Ray Tube). Recorded specifications: brand TELEFUNKEN, construction Display / CRT, base Small-Button Unidekar, socket Magnal, and maximum plate voltage 5000 V. The archive does not yet hold a photographed example of this type.
BrandTELEFUNKEN
ClassCathode-Ray Tube
BaseMagnal
Filament6.3 V @ 300 mA
Construction
Primary TypeDisplay / CRT
Envelope4 inch flat face
Base MaterialSmall-Button Unidekar
SectionsSingle beam
Filament / Heater
Heater NotesLow current heater
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Standard | 2000 V | — | — | — | — |
Application Notes
The accelerator voltage is made variable from 500 Volts to 530 Volts to provide for astigmatism control. Low current heater reduces power requirements.
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