Model: 721B
Electron TubeSpecial Features:
Envelope material: glass; mfg class: tr tube, external cavity
Properties:
An inclosure, including two or more electrodes, in which a flow of electrons may occur through a vacuum or a contained gas. The electronic conduction takes place either by means of electrons emitted from a cathode or by ionization of the contained gas. Includes phototubes (photoemissive type only), geiger-mueller tubes, traveling wave tubes, cathode ray tubes and microwave tubes (klystron, magnetron, or the like). Excludes items whose primary purpose is to produce light energy. Also excludes photoelectric cell; and semiconductor device (as modified).
Part 721B NSN 5960-00-188-3913
Material Classification
Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicatorsPackaging & Shipping
Freight Classification
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Schedule B and Export
- Schedule B: 8540890020
- SITC: 77627
- End Use: Telecommunications equipment
- NAICS: 334419
- USDA: 1
Freight Class: Gas and vapor electron tubes, nesoi
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