Get a mercury vapor tube our of one of those cheap gimmicky phone sanitizers. They have several landmak emissions for calibration of spectrometers. A while ago i used to grab surplus honeywell air purifier tubes and combine them with ccft drivers out of old document scanners. They worked great. 🤓
@magx1
3 жыл бұрын
You do excellent work - a solemn presentation with a professional demeanor. I appreciate the serious content, without comedy and mockery towards anything that isn't new or representative of the latest technology.
@LesLaboratory
3 жыл бұрын
Thanks! Nothing wrong with old tech to my mind, often it is better. Take diode lasers for example, they drift in frequency at around 0.25nm/degree C without temperature control. Gas lasers on the other hand are very stable, the beam quality is excellent and have known frequencies, so make good standards.
@matteomaroncelli7849
9 ай бұрын
A GREAT help! Thank you so much!
@HuygensOptics
3 жыл бұрын
Thanks for sharing this! HeNe laser on eBay are still over a 100 euros mostly. Do you by chance know anything about how the current luminous output power relates to the original specs?
@LesLaboratory
3 жыл бұрын
I picked up 2 for under £30 listed as unknown condition, so it was a gamble. But both work. I have not measured the output, but from visual comparison, I expect it is around 5mW. He-Ne lasers age well, and will keep working for decades, especially the newer hard sealed tubes.
@dancollins1012
3 жыл бұрын
Great video. Is the power supply suitable for a CO2 laser tube? What current can it supply?
@LesLaboratory
3 жыл бұрын
The design I am using is current limited to about 8mA for He-Ne lasers,, but ZVS drivers are capable of pushing hundreds of watts through a line output transformer. I'm not sure how long a standard monitor transformer would stand up to the punishment, but they are cheap, so give it a go! You can buy CO2 laser transformers pretty cheaply as well, and I am willing to bet you could drive one with a ZVS successfully.
@florinpetrache7834
3 жыл бұрын
maybe i can do it with ceramic capacitors(10kv at 2,2nf)18 in paralel(equivalent aprox 0,04uf).the problem is the flyback have an output aprox 10-12kv. i can burn my capacitors with that tension.i can use a ballast resistor before capacitors to drop the voltage a little?
@dalenassar9152
Жыл бұрын
I have several of these He-Ne lasers (red and GREEN) but no ps. In the video, did you leave the internal ballast resistor inside (I think they are cylinderical)? Have you powered a green unit? THANKS MUCH!!!
@brianbloom1799
Жыл бұрын
Hi LES lab,s , can you help me, First off I want to say, I know very little about Electronics. But around 8 years ago I picked up a old Laser, I found out it was the first laser costing 1,525 dollars usd, The maker is Spectra-Physics 130 gas laser,, When I first Got it To be honest I pluged it in to see if it worked, And it did, Beautiful blueish purple light, I shut it off, I could never get it to light up again, I dont know what its worth, But would love to get it working again, What could I do, Thanks Brian
@homohobbit179
6 ай бұрын
Hi, great video, where did you find that connector? Ebay?
@LesLaboratory
6 ай бұрын
Yep, eBay. They are pretty hard to come by though. there is not much to them, perhaps they can be made on the lathe.
@florinpetrache7834
3 жыл бұрын
I cant buy these capacitor from Romania.It could work without smoothing?My flyback is AC type.I tryed with many diodes and resistors and it work 5 seconds very well but after 5 seconds the diodes it burned.Maybe is fine to try with bigger diodes and bigger resistors?
@LesLaboratory
3 жыл бұрын
You need to smooth the output. He-Ne's are unstable without it, and will significantly shorten tube life. Do they not have eBay in Romana? I had mine shipped from China! If not, you could always make a HV capacitor by series up large value lower voltage capacitors, as most Tesla coil builders are familiar with. Google: MMC or "Multi Mini Capacitor"
@dalrob9969
Жыл бұрын
Put a 1k one watt resisror, across the millamp meter. Protects it, gives it a contances and meter will not overheat..and stops induction spike from the meter coil winding, wile starting, I've been doing that since 1968.
@viorelaalexandru361
3 жыл бұрын
your curent from the flyback is DC or DC in pulses?
@LesLaboratory
3 жыл бұрын
DC. There is probably plenty of ripple, but I'm not putting my scope near it! The output is smoothed by the huge caps anyway.
@VlV.Phantomboy
3 жыл бұрын
Нужно ли трубке время на прогревание или он сразу включается (мгновенно)? Спасибо за субтитры на Русском!!! У вас интересный канал. Подписался!)
@LesLaboratory
3 жыл бұрын
Немедленно. Спасибо!
@florinpetrache7834
3 жыл бұрын
so it will work with ceramic capacitors?
@LesLaboratory
3 жыл бұрын
It might, but honestly, you would be better with polypropylene caps.
@arvindh13
3 жыл бұрын
Can you provide a link to buy laser tube?
@LesLaboratory
3 жыл бұрын
I just find mine on eBay, just search for "He-Ne" "Helium Neon" etc etc. They turn up quite regularly.
@arvindh13
3 жыл бұрын
@@LesLaboratory I did search, but can’t find it, If possible please send me a link
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