Public domain photos

The image shows a close up of a vacuum tube on a white surface. It is a small, cylindrical object with a black and silver color scheme. The top of the tube is slightly curved and has a few wires protruding from it. The surface it is sitting on is a plain white color.

The image shows a close up of a vacuum tube on a white surface. It is a small, cylindrical object with a black and silver color scheme. The top of the tube is slightly curved and has a few wires protruding from it. The surface it is sitting on is a plain white color.Open in library