So much manual labor on something we now take for granted in modern electronics.

Between the Chemicals, X-ray exposure, unguarded saws, etc. Not a scene in this movie could be duplicated today! OSHA would shit a brick!

As A novice Amateur radio operator, I was only allowed to use a transmitter with a crystal to control the frequency, no variable frequency oscillator transmitter was permitted, which meant I had to spend my allowance on many crystals, for the three bands I was allowed to operate on. As I learned over time, the crystal frequencies could be changed by disassembling the holder and using a pencil to make a dot on the center of the crystal, I could lower the frequency a small amount, or by grinding the crystal on an oilstone, I could raise the frequency in order to avoid the many foreign broadcast stations operating in the novice ham bands. But the best crystal hack was to add a screw to the metal cover of the crystal holder, and adjust the pressure on the mounting plate to change the frequency without having to open the holder each time to change the frequency. All that changed after the first year as a novice, when there was a rule change, allowing VFO, variable frequency oscillator transmission, and my money was spent on a VFO for my transmitter! And what a change! Being able to tune up and down the bands opened up my tiny novice bands, and I was able to communicate with other hams around the world much easier than ever! But the best type of frequency control is the 'synthesized' oscillator, and it still uses a quartz crystal to stabilize and control the oscillator, and allows for channelized switch controlled frequency selection. Technology has advanced, but crystals will still be used in electronic equipment in order to keep the required source of oscillations needed at the right frequency, and as stable as possible. And even if the crystals are no longer made from natural quartz crystals, but are grown in a lab, the history of their benefits to communication and other electronics, including the health industry, will continue to grow!

Watching a +75 years old documentary... internet is amazing.

1958 I was an apprentice at DECCA Navigator. Another apprentice an I were given a job of building Xtal Oscillator assemblies for the DECCA Mk 5 marine navigation system. We measured the resonance and output voltage of each plate before assembling into the module. The clear used was called Araldite, the British version of Eastman 400 glue. We then tested the modules in an Oscillator jig. We delivered each batch to the production Foreman. Later I was a Priduction Inspector. I finished my Apprenticeship as a Prototype Technician to an Engineer. The Engineer was Ken Mantovani, son of Maestro Mantovani, of the Mantovani Orchestra fame.

How did YT know I'd be incredibly interested in this topic? Nothing in my viewing history would suggest it. I'm convinced YT is reading my subconscious mind. Somehow.

The fact that someone actually figured this out just amazes me and reminds me how stupid and uncreative I am

An SC-cut 5th overtone crystal maintained at 90 deg C drives a diy clock I made 10 years ago. In that time it has gained nearly two seconds. That's one part in 158 billion. Quartz is amazing!

I love old documentaries. No BS, just explain.

These ladies showed up to win a war with style on point. Love it.

Those process opened the doors to microélectronics chips manufacturing process.

Although I was a professional RF Engineer, for very many years, I had never seen this documentary film before. I have designed and used crystal oscillator circuits many times in my life but I had no idea just how many production stages and tests were originally involved in mounting and manufacturing the quartz slices. A great film detailing a piece of technology history.

Did you know that 4 quartz makes a gallon and ten gallon makes a hat.

So interesting, It's amazing the things that were done with analog processes. It also shows that to be victorious in war your women need fine haircuts, nice outfits, and above all GREAT nails. Also interesting and telling about just how much industrial capacity the US had, this film is in color. It is amazing how many of these type films were done in color which was fairly expensive at the time and something only a truly great power fitting on all cylinders could afford. My God what we have lost.

Wow, old technology with respect to frequency determination, but darn impressive, plus a lot of work to manufacture.

When I was a young engineer in the mid 80's. I developed an TCXO in Thickfilm technology. Afterwards I developed a crystal plating machine.

One of my customers bought the outdated US national reserve of natural quartz crystals for a song. Made them into gemstones.

Narrator turning the pages on his sheet is hilarious

I love old documentaries. No annoying background music, no over-editing and no irritating hyper-sensationalism. Just pure well presented information

This is peak YouTube. Thanks for sharing!