Brilliant tear down, power up and circuit diagram generation and analysis. The first time I've seen a Cesium lamp fired up :) All very interesting, looking forward to the next episode and you deserve many more views and subs. All the best, Beamer.
Great reverse engineering. Awesome that you got it to work. The mystery feedback part looks like a vintage 'solar cell' based on the electrode structure that would be used to stabilise the light intensity. There was a small hole in the bulb housing to pass light to the cell you can see around 7:50 to 8:10. The 'integrator' has a proportional component so a PI controller. The extra comparator would be used to detect if the intensity feedback loop is unable to maintain the trimpot set-point and either the bulb has not lit yet or is not bright enough I suppose, a LAMP OK signal of some sort. You could very carefully place an partial obstruction between the lamp and detector to see if the lamp goes brighter and the status line changes.
Used to have several of similar lamps with different metals and gasses in them that came in a university auction lot. Was told they were from an atomic clock experiment, but this looks closer to the design of them. The two with the highest Qrf -delta value (rf gain ratio of change) was helium neon and cesium, and helium argon and rubidium. Vials were made of quartz tube as well.
@@lelabodemichel5162 Your choice not to monetise keeps you honest. There are a lot of people in the social media who have promoted propaganda and avoided calling out abuses of power because they have feared loss of revenue. Keep backups of your videos and let people know if you have an alternate repository as any one site is impossible to trust and nice if our loyal followers can find you..
Brilliant tear down, power up and circuit diagram generation and analysis. The first time I've seen a Cesium lamp fired up :) All very interesting, looking forward to the next episode and you deserve many more views and subs. All the best, Beamer.
Great reverse engineering. Awesome that you got it to work.
The mystery feedback part looks like a vintage 'solar cell' based on the electrode structure that would be used to stabilise the light intensity. There was a small hole in the bulb housing to pass light to the cell you can see around 7:50 to 8:10.
The 'integrator' has a proportional component so a PI controller.
The extra comparator would be used to detect if the intensity feedback loop is unable to maintain the trimpot set-point and either the bulb has not lit yet or is not bright enough I suppose, a LAMP OK signal of some sort.
You could very carefully place an partial obstruction between the lamp and detector to see if the lamp goes brighter and the status line changes.
It is time for me to buy a new pair of glasses, I didn’t see the small hole!
Used to have several of similar lamps with different metals and gasses in them that came in a university auction lot. Was told they were from an atomic clock experiment, but this looks closer to the design of them. The two with the highest Qrf -delta value (rf gain ratio of change) was helium neon and cesium, and helium argon and rubidium. Vials were made of quartz tube as well.
There are MRF315A transistors installed on the PCB, but MRF135A on the pencil schematic diagram.Mystic...
Hello, toujours intéressant et impressionnant, bonnes fêtes de fin d'années !
Merci, bonnes fêtes à toi aussi
very interesting, I hope one day I can understand it
Indeed there is no electrode. The gas is excited by the high frequency magnetic field. Tanks you very much.
👍
Congrats on 500 subscribers! Half way to getting monetized
I will never enable monetization on my channel, even with 1 million subscribers.
@@lelabodemichel5162 yea I’m might do the same but I just wish TH-cam would stop putting ads on not monetized channels
@@lelabodemichel5162 Your choice not to monetise keeps you honest. There are a lot of people in the social media who have promoted propaganda and avoided calling out abuses of power because they have feared loss of revenue. Keep backups of your videos and let people know if you have an alternate repository as any one site is impossible to trust and nice if our loyal followers can find you..