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  1. twelti

    I am wondering what kind of things you "vets" DO with your lasers, after acquiring, tweaking and...

    I am wondering what kind of things you "vets" DO with your lasers, after acquiring, tweaking and comparing etc. ?...and after burning up a few things (which gets old fast it seems). Do you do experiments? Laser shows? Holograms?
  2. twelti

    Cheap "Scanners"

    If you go up to the $100 version, it shows a power supply. That one is also a 30 k version, probably the one to go with for a cheap starter (?)
  3. twelti

    Cheap "Scanners"

    I have an 8 ch 96kHz capable sound card so no issue there. yes, maybe some inexpensive sw to test it would make sense.
  4. twelti

    Multiple electrodes to minimize voltage requirement

    I wonder if a single multi-tap transformer would work? For vacuum pumps, do you think the el-cheapo HVAC ones you can get on Ebay for $120 would work? It is hard to find specs on what they will pull. Is Robert Ianinni the same one who did the CO2 laser plans form Information Unlimited? I have...
  5. twelti

    Multiple electrodes to minimize voltage requirement

    I think my general approach will be to start with a small pre-made tube, then build a short one from scratch, then a longer one. This way I can get the gas mixture, vacuum and high voltage parts and general safety figured out on a known working tube. The second tube will be same length as the...
  6. twelti

    Multiple electrodes to minimize voltage requirement

    Good advice! Your "Volts jolts.." reminds me of some of the mnemonics I learned in school (BSEE). I should know most of this, but it has been over 30 years. Since I have been in acoustics, I rarely had occasion to think about volts, mills, divider etc. But it is coming back. I was thinking...
  7. twelti

    Multiple electrodes to minimize voltage requirement

    Regarding the HV twitchiness, is it possible to use a high voltage probe to check to see which parts are "hot"? Of course, if it is intermittent... I'm just trying to think of how I would design it so there is no need to get anywhere near it when operating. I guess you would need to when...
  8. twelti

    Multiple electrodes to minimize voltage requirement

    Very interesting about the AC. I also had heard DC was better. I like the AC also since no rectifiers or nasty capacitors! Relatively safer and simpler. Just the NST. Yes, it seems you can buy a 50w tube and matching power supply for around $300. I was wanting to make it from scratch, but...
  9. twelti

    Multiple electrodes to minimize voltage requirement

    Thanks for the advice! I would love to benefit from your real world experience. But what do you think about having more electrodes? I'm guessing it won't be a good idea especially given your comment about hard to find electrodes. I though people were using cheap metal fittings for that. I...
  10. twelti

    Cheap "Scanners"

    I have purchased an RGB module from Banggood, also on the cheap. I was thinking maybe the $100 scanner (which does show a power supply) and the Banggod RGB could be fun. I have a sound card already. I was thinking maybe to try to make my own "software". I am familiar with several high level...
  11. twelti

    Multiple electrodes to minimize voltage requirement

    I'm interested in learning more about CO2 lasers. I would love to eventually build one. It's more of a thought process right now, I'm still learning about lasers in general. I'd be interested in a 80 + watt device (maybe start with a smaller one to learn on). I'd love to use a design that...
  12. twelti

    Cheap "Scanners"

    They have one for $100 that is 30k, and +/- 15 degree. Tempting!
  13. twelti

    Cheap "Scanners"

    ahh, that is the kicker then, response time. They do have several models up to a couple hundred dollars so that is nice. Heck though, for $40 just to play with, could be fun!
  14. twelti

    Cheap "Scanners"

    I found a link in another thread here with Chinese suppliers, and found this cheap "scanner' (what they are calling galvanometers I guess): http://goldenstarlaser.com/index.php?route=product/product&path=96_97&product_id=256 The cheapest one is $40 (?!?) That can't be right, though the pic...
  15. twelti

    GUIDE: Which company should I buy from?

    Just received a package from "Burning Laser Pointer" vendor, also known as "RUIBAI TRADING LIMITED ". Received two used, broken laser pointers. I didn't see their name on the do not buy list. Hmmmm
  16. twelti

    Intro and need advice for goggles

    I got the Eagle Eye goggles and the Blue 5 w gatling laser a few days ago. It also comes with cheap goggles. Wow, the Eagle Eye goggles are so much better. I can't even see any blue color in the dot, just sort of a weak yellow. With the cheapies I can sorta tell it is a blue laser. The...
  17. twelti

    I have lots of dumb questions and maybe a couple of good ones! I will think a little more and...

    I have lots of dumb questions and maybe a couple of good ones! I will think a little more and post, or maybe just ask you. Zip code is a closely guarded secret (not). i will add, and see who is in my area (Thousand Oaks).
  18. twelti

    Banggood RGB module

    Thanks for the clarification. I will probably order a complete package. Two of everything!
  19. twelti

    Intro and need advice for goggles

    Yes, I meant to say IR. So, the higher power green direct diode lasers should not have issues, but they are more expensive?
  20. twelti

    Banggood RGB module

    Thanks again. I did see that "budget-tested-safety goggles" thread, but not sure if he was legit. I guess he is! I will order asap. I'm interested in the Lumia projector. I have been looking at galvanometers and such, wondering how to make a cheap light show. I am in acoustics, so have...




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