My Granddad has always been a keen photographer, and by photographer, I mean someone who develops their own prints. So, I asked him to show me how to develop black & white film, so I could try and make an image with my machine. He showed me how to process film, and even gave me 5x4inch film, and the developing chemicals.

I made a small cardboard film holder to hold a single sheet of film, and, lacking a darkroom loaded it at night under the duvet.
The film holder was placed under the tube, and some random objects placed on top, I switched it on for a while, and when I thought it had been exposed enough, switched it off, and took the film holder to my room to be developed under the duvet again.
The resulting radiograph, was very pale and washed out, but it was indeed a radiograph!
I managed to do a few more exposures, including a good one of my fingers, but the exposure times were high, as long as 30 minutes, and eventually the glass of the radio valve cracked from heat. I never did find another one that emitted so much radiation, and this brief hobby was over.

Some years later, my interest was re-kindled by an article I had read on the internet, about a man who had used polaroid film to take radiographs. I lashed together a tesla coil in the garage and proceeded to test some more radio valves, and managed to produce a somewhat blurred radiograph from this setup. Whilst experimenting with this setup, I managed to purchase a small dental x-ray tube. I built a power-supply for it, and lead shielding, and made an exposure using polaroid. The developed image was very dark, but the sharpness and detail from using a proper tube was astounding. A little tweaking later, I had a usable x-ray machine, some of the first polaroid images are presented below.