In addition to the sweet smell of fresh ditto copies, very fresh copies felt noticeably cooler due to the evaporation of the solvent.

I missed this last month. This is gold

May we please have another video?

I had authentic chunks of the Berlin wall when I was a teenager and gave it away. The "novelty" of holding graffiti coated bits of concrete wore off very fast.

Has this unit been recapped or is it running on original parts?

And what is happening if the bomb has wings?

Fascinating! But the second section of the video was essentially reading tabular information, which would be more easily understood if you just put the table on screen during that section.

The crystal detector is a Schottky junction, or equivalent. 1N5711 or 1N5712 is a good one. Also blued Razor Blades.

During my conscription in the Finnish military back in the early 90:s we had flare pistols very much like the one at 16:58. Don't remember if they were exactly the same but very similar. The equipment of the Finnish defence forces used to be a bevildering mix of western, soviet (some bought, some, especially right after WW2, captured) and domestic stuff. Lately they have been gradually getting rid of the now mostly obsolete Soviet gear and moving more towards Nato-compatible western equipment.

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. 🥺

It might be possible to load those plate holders with sheet film cut to appropriate size if the camera is still functional. Those look a lot like the "septums" used in the Graflex Grafmatic sheet film magazine which is an interesting piece of vintage photo equipment in itself.

In the late 1980s, a university pal and I were studying at his place when we noticed that his cat showed far too much interest in the fish tank. He was studying mechanical and I was studying electrical engineering, and so we pooled our resources to prank the cat. My friend devised the trigger, which was a pressure switch placed in front of the fish tank. The switch took the form of cardboard from a notepad wrapped in aluminum foil. Actually, there were two pieces of metalized cardboard, separated with pencils. We then connected the switch and a battery with wire to, yes, a flash cube found in the kitchen drawer. We carefully placed a towel over the switch and then receded to the background to watch the show. Eventually, the cat (thinking we weren't paying attention) headed back to the fish tank. He stepped on the switch, closed the circuit, and caused the flash cube to ignite. Did i mention that we dimmed all the lights? The cat jumped straight up and we laughed for hours. Engineering! Flash cubes - 101 uses.

Using humans as batteries might not be the model of efficiency, but it makes for a better script.

"I'm zenesier" you excell at being hardly pronounceable

Neat.

🙏🙏🙏🙏🙏🙏

I could feel my eyes glazing over.

Pity you live in a communist country.

I used some of these machines for amateur press associations for several years. I also used them for making copies of my church's Sunday bulletins every Sunday for years. Part of what made this convenient was the availability of tractor-feed ditto masters (sold as continuous forms in 100-sheet boxes. Instead of needing to manually correct typographical errors, a computer with a dot-matrix printer could print an entire master page in just a few seconds. This made making dozens of copies quite quick and convenient.

Wonderful video. So many new things to learn.

there are adapters for this camera.

Very clever bit of engineering!

Have a great day likewise!

Technology Connections wants his ill-fitting blazer back.

How did I miss the Bander machine video? I have been having a recent conversation about these copiers. I remember being given a special task by my primary school teacher to run off several dozen copies. It was like an exciting treat to be operating the treadmill & breathing the solvent cherry and berry mix was a good buzz at seven years old! Deep breaths of the fresh prints was mandatory. I should probably watch the video first...

I don’t know what the internet was thinking, but here I am, and now I’m fascinated…

fired the FN C1 version with what i think was a C33 round, silver casing with a black cap (no crimping I can remember). We had to take the gas piston out and reverse the gas plug (for range practice). It has been a while (mid 80s) but from what I remember it was loud, we had ear plugs puls ear defenders on, and our ears were ringing.

You forgot Teaberry!

Does anyone have the plans to build a crystal transmitter?

I used to be an excavator driver and sometimes would have to assist blasters, bring them caps, dynamite or gravel used over the dynamite in the holes etc. And I would of course use the excavator to place the huge blasting mats made of old truck tires over the rock after loading the explosives to prevent pieces of rock from flying around. Sometimes sand was used to cover the rock if mats were not available. The caps used nowadays have a calibrated ignition delay so the rows of holes can be set to explode one after another instead of simultaneously to assist the breaking of the rock and lessen vibration. They are used so the first rows of holes go first followed by the other rows in rapid succession so the rock material "opens like the pages of a book" and falls sideways instead of flying up. The blasting machine commonly used was made by Dynamit Nobel company, very much like the second machine in this video but bigger and it was red and yellow. It had two buttons, a crank and a voltmeter and you would hold one button down while cranking until the voltmeter shoved the voltage was sufficient for the number of caps used (caps were wired in series so the more caps the greater voltage) and then, while holding the first button, press the second which would detonate the caps.

Probably used for telephone lines etc. where you expected the joint to last for some time. For blasting wires I assume twisting them together would be enough as they are not likely to be left exposed to the elements for any lenght of time. Even today blasting cap wires come with a kind of "wire nut", a plastic sleeve in wich one wire is already attached and you insert the other one and give it a few twists to connect and insulate the wires.

Fascinating, as always. Love your work.

Tesla deserves the credit for all of this and MUCH MUCH more, without him we wouldnt have the technologically advancements we do today. Our world would look much different if it werent for Tesla but sadly the cabal destroyed him because he wanted to share his technologies with the world.

Bought one in Paris this weekend as a gift.

I’m loving those orthographic projections

You sound like Ian from forgotten weapons

As a chemist I find this rather interesting, as anyone who works with oil paints can tell you temperature and humidity can pretty drastically affect the rate of reaction (oil paints don’t exactly “dry” they react with the air.) the open glasses might well have produced the effects of a wet bulb thermometer and a barometer but, well, confused and mixed together.

I wonder how difficult it would be to retrofit a modern NV scope into this housing.

The shelf is in backwards

Give us a thanks button

why so many cooling ribs, isnt this energy then wasted

I went all the distance^^ Thanks for this video. In War Thunder, tanks and ships have these sometimes good visible rangefinders, now i know how they worked in real life!

I had a crystal radio as a child, around 1958, that looked like an egg with a knob on one end that you turned to tune, a wire with an alligator clip that I clipped to the steel frame of the bunkbed and a earpiece. I loved that thing and could get all of the local AM stations. Thanks for reminding me of it 🙂

Nice

I know it's Gilles but I almost always hear Gine/Jean

stay-dee-om-eter not stad-eo-meter. like ther-mom-eter instead of ther-mo- me-ter

The cost difference between those types of industry standard thermocouples must be bananas. Iron/copper vs iridium/platinum? One of them can be salvaged from junkyards, the other requires sacrificing virgins.

It my fundamentals of AC are not rusty, it would seem these radios function better when fewer people use them, as they put an effective load on the tx antenna, reducing the radiated power, right?

That intro had my whole family on the floor, so good!

If you're testing more than one possible outcome shouldn't you have to get less than 50% in order for it to be as good as chance? Does that mean that this thing does work or did he misspeak or what?