File:Vacuum tubes.svg
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![File:Vacuum tubes.svg](https://upload.wikimedia.org/wikipedia/commons/thumb/a/a7/Vacuum_tubes.svg/754px-Vacuum_tubes.svg.png?20070307152435)
Size of this PNG preview of this SVG file: 754 × 376 pixels. Other resolutions: 320 × 160 pixels | 640 × 319 pixels | 1,024 × 511 pixels | 1,280 × 638 pixels | 2,560 × 1,277 pixels.
Original file (SVG file, nominally 754 × 376 pixels, file size: 18 KB)