Glassblowing #2: Making a tungsten lamp and (bad) vacuum diode
5 hours ago
- #homemade-lamp
- #vacuum-diode
- #glassblowing
- Explains the process of making a homemade tungsten lamp using a vacuum-sealed glass bulb to prevent filament oxidation.
- Details steps: bending tungsten wire into a U-shape, attaching a fine filament, sealing in glass, evacuating air with a vacuum pump, and sealing the bulb.
- Highlights that filament temperature affects light color and efficiency, with higher temperatures producing white light but shorter lifespan due to evaporation.
- Describes an experiment to create a vacuum diode using the lamp setup, noting poor performance (1 uA current) due to gas release from the filament and small anode area.
- Mentions practical issues like filament touching glass and the trade-off between lamp lifespan and efficiency in traditional incandescent bulbs.