Here's the plans for the shelter, and a bottle of vintage 1961 water. It was only about two years ago that we threw away the bottled sugar and the hash brown potatos.
Dad built a geiger counter back around 1957, using a new electronic device called a "transistor".
The AAA flashlight battery on the right powered the transistor amplifier.
The large capacitor on the left, and the transformer was the high voltage power supply.
This unit used a spark gap rectifier. It's a very simple arrangement which works fine, as long as the gap is carefully adjusted. The microswitch is pressed repeatedly to operate the supply. When the switch contacts make, a AA penlight cell (removed, because after 50 years, they start to leak) sets up a magnetic field which builds up rather slowly, and produces a small pulse in the secondary. When the contacts break, the field collapses rapidly, and produces a large pulse in the opposite polarity. This is the only time that the potential is able to jump the gap, and the capacitor charges up.
I later bought a new TV so I could pick up the local stuff. All of the TV networks are government run, and the quality was outstanding - I never saw 'technical difficulty' of any kind.
The network I watched most was ZDF - Zweites Deutsches Fernseh (Second German Channel). Most of the American shows were dubbed into German - I Dream Of Jeannie, Eddie's Father, Raumschiff Enterprise (Star Trek), Laurel & Hardy, and many others. Movies were mostly dubbed "Manner Moschen Heiss" (Some Like It Hot), but a few were subtitled German with the English audio.
The commercials were set up nicely. Instead of butting in the shows, you could watch about 3 hours uninterrupted, followed by a block of 15 minutes of commercials. Long enough to get a lot of snack food ready.
Between each commercial, the Heinzelmannchen (shown above) would appear in a cartoon clip. At the end of the commercial block, they'd come back and do a one or two minute cartoon. One night they did a whirlwind trip around the world - eating French bread at the Eiffel Tower, doing a Russian dance in Moscow, or doing a bullfight in Madrid. When they got to America, they danced around a teepee singing "Yankee Doodle".
German TV was totally uncensored, especially late night. They had their own version of Sesame Street (Sesamstrasse), which had scenes that just couldn't be shown here.
I have had lots of people slow down to look at these things.