Just as a point of interest, I used to work at a USDOE national lab. We were still using quartz fiber dosimeters as recently as the early 2000's. For all I know, they may still be using them, although the last time I needed a personal dosimeter, the labs I worked in were transitioning to more modern electronic units with alarms and digital readouts.

500 Roentgens. Not great but not terrible. Props to 2020 memes.

I have a CDV 700 that still works, and according to the manual, is still fairly accurate measuring the check source of depleted uranium. I love old WW2 and cold war and Civil Defense stuff. As usual, another awesome video, keep up the good work man.

I have a 3 or 4 quarz dosimeters and a charger I got from a surplus dealer. These were originally used by the Finnish civil defence authorities. They all still work, only the light bulb on the charger is faulty but it has a lens you point at a strong light source to be able to set the pointer. I also have a couple of gas masks and a military surplus NBC protective suit though I don't know if it's too old to be effective. But better than nothing I guess. I really hope I won't have to start actually using them in the next few years, it does not look good in this corner of the world with our "beloved" neighbour Russia attacking Ukraine and threatening the rest of the world with nuclear weapons if they interfere almost weekly. 🥺

Appreciate your videos. It is fun to take apart things we did not have access to as children. 👍😎 - The vacuum tube is a lesson in context. If your platoon has a guy checking for whatever radiation is lurking about, everyone is going to hope he is well trained on whatever methods are necessary for detection. - Thanks for the breakdowns. I don’t always have the time, but enjoy your content when time permits.

I really like this channel. It's very interesting & varied.

I have several Civil Defense detectors & dosimeters I ever have the CD-736 with the 0-20 mr. I love this stuff. My ol lady was somewhat concerned when I ordered some Cobalt-60 sources.

Great video, Gilles...👍

Never heard of that fluorescent glass method before. Can we see it with a UV led?

Good video but why is this only in 480p?

How would they have gotten the initial 21 rad measurement? Was there another device, or did they have a standard way of estimating TEDE?

Where can I find your prior video about the RADIAC calculator?

I own a cased surplus 5015/TD Radiacmeter. It probably works, but I have no idea where to get 7 replacement 6,7 Volt batteries. It also requires 2 1.3 Volt batteries, I figure a 1.5V (AA, C or D cell is close enough to that requirement), but the 6.7V batteries that would fit in the case is a problem. They are wired in separately to different circuits so I need all 7. If anyone knows of a source for a non-mercury alternative battery please advise me.

I found a DT-60A/PD on my grandfathers' dogtags whom served during WW2. What does this mean ?

Hey Gilles, what is going on? I miss your videos.

Yeah I don't believe for a second they used to have little buttons of cobalt 60 they would hide around the high-school that makes no sense and would be extremely dangerous. You are pulling our legs hard with that one.

Nuclear war didn't happen in Canada, so how did they run out of measuring equipment and sent men on a sucide mission? Seems pointless to go out of the bunker every hour, knowing that the radiation would still be there. How does a machine measure "rads" if they depend on particular living tissue?