Tube-number record
OA5
0 archive entries
OA5 is a tube type in the TubeDatabase archive (class: Cold cathode trigger tube). Recorded specifications: brand SYLVANIA, construction Other / special, base Miniature, socket Miniature 7-pin (B7G), maximum plate voltage 1000 V, and maximum plate dissipation 1 W. The archive does not yet hold a photographed example of this type.
BrandSYLVANIA
ClassCold cathode trigger tube
BaseMiniature 7-pin (B7G)
Construction
Primary TypeOther / special
EnvelopeMiniature T5-1/2
Base MaterialMiniature
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage1000 V
Plate Dissipation1 W
Grid 1 Voltage90 V
Cathode Current10000 mA
Audio Performance
Key Features
- Ruggedized
- Inert-gas-filled
- Stable triggering characteristics
- Short delay time
- Low trigger current requirements
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Switching Service | 750 V | — | — | — | — |
Application Notes
Specifically designed for electronic relay and switching service involving extremely high instantaneous peak currents. Ideal for triggering flash tubes in electronic photoflash equipment, depth recorders, and stroboscopic work. Can be triggered directly by phototubes.
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