Tube-number record
PL 1267 / Z 300T
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BrandPHILIPS
ClassCold Cathode Trigger Tube
BaseOctal
Construction
Primary TypeOther / special
EnvelopeGlass
Filament / Heater
Absolute Maximum Ratings
Plate Voltage310 V
Cathode Current25 mA
Audio Performance
Key Features
- Welding timers
- Relay and counting circuits
- Power switching
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Trigger Tube Operation | 70 V | — | — | — | 25 mA |
Application Notes
The tube is recommended for operation only with both anode and starter voltage positive. The tube must be exposed to some light. Full sunlight or complete darkness should be avoided.
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