Tube-number record
Z805U
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BrandPhilips
ClassGas-filled Relay Tube
BaseNoval (B9A)
Construction
Primary TypeOther / special
EnvelopeGlass
Sections1
Filament / Heater
Absolute Maximum Ratings
Plate Voltage450 V
Grid 1 Voltage155 V
Cathode Current25 mA
Audio Performance
Key Features
- Independent of lighting conditions
- Short ignition delay time
- Excellent high voltage properties
- Priming discharge via external resistors
- Positive starter voltage
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| D.C. Operation | 250 V | — | — | — | 20 mA |
| A.C. Operation | 230 V | — | — | — | 25 mA |
Application Notes
Primarily intended for use in A.C. circuits, relay service, D.C. timers, and photo-electric control service. Requires anode screen and cathode screen connected via 10 MOhm resistors.
Datasheets
Datasheet: Z805U.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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