Z505S
0 Tubes in archive
ClassSelector Tube
BaseB13B
Construction
Primary TypeCold cathode gas-filled
EnvelopeGlass
SectionsTen main cathodes
Filament / Heater
Absolute Maximum Ratings
Plate Voltage1000 V
Cathode Current1 mA
Audio Performance
Key Features
- Bi-directional decade selector
- Counting tube
- Visual indication
- End viewing
- Ten main cathodes brought out separately
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Recommended | 300V | - | - | - | 0.8mA |
Application Notes
Designed for visual indication and operation at speeds up to 50 kHz. All voltages are referred to the most positive supply potential to which any main cathode is returned.
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