Glass vacuum-tube stem blank, formed by centrifugation and annealed.
Also available in low-profile slot shape.
To use, heat to working temperature, press against
Dumet wire assembly and immediately anneal
to produce an UHV-tight electrical feedthrough.
Fuse against our matching 30mm envelope to
produce a complete vacuum tube.
Our blanks are inspected individually. We guarantee reliable,
stress-free fusing against our other soda-lime glass items.
- Material: Soda-Lime Glass (Schott AR-Glas®; Hydrolitic Class 3)
- Wall Thickness: 1.5mm ±.06 (.059" ±.002)
- Large End OD: 30mm (1.18") min.
- Small End OD: 18mm ±.23 (.709" ±.009)
- End Execution (Large End): Fire-Polished
- End Execution (Small End): Ground
- Length: 30mm ±5 (1.18" ±.196)
® AR-Glas is a registered trademark of Schott AG.
