Tube-number record
P-568
0 archive entries
P-568 is a tube type in the TubeDatabase archive (class: Gas Filled Phototube). Recorded specifications: brand SYLVANIA, construction Other / special, socket Special / none, and maximum plate voltage 1000 V. The archive does not yet hold a photographed example of this type.
BrandSYLVANIA
ClassGas Filled Phototube
BaseSpecial / none
Construction
Primary TypeOther / special
EnvelopeUltraviolet transmitting glass
SectionsTwo symmetrically arranged electrodes
Filament / Heater
Absolute Maximum Ratings
Plate Voltage1000 V
Cathode Current10 mA
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| AC Supply Operation | 500 V | — | — | — | 6 mA |
Application Notes
Applications include flame detector for furnace control, fire detection, and ultraviolet radiation detection and measurements. High output current allows for direct relay operation.
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