Activity Stream

I Will be attending SELEM 17 2024! I have missed a few years 😞 ...but now am happy to return to see some old friends and to meet new ones. Due to to circumstances...I will arrive at hotel/venue 08/04 in the afternoon and sadly departing early on the 9th. Thinking about the Homewood...

That was Aron Bacs who was interested, but he got a military contracting job (yay!) but as a result can't make it to SELEM (boo!!!). And unfortunately that 4-BR house is no longer available for that week. The 3BR house on the golf course is available, but as someone pointed out the Homewood...

Hank, I thought a couple folks from the recent PL Zoom call were interested in the Air BnB option that you found? Did that not work out? Honestly, it's really a great deal. If you had all 4 rooms booked, it ends up being cheaper than any of the local hotels, and you've got the entire house...

I think this could be a lot of fun! If people are concerned about the whole "contest" part, well, I think Ethan was using that term loosely. We could just go around the room and have folks demonstrate their approach; we don't need to actually grade / score everyone's effort. Adam

Looks like round-trip train tickets from Charlotte to Wilmington start at around $200-ish for coach seats. The trip takes about 10 hrs, although it does vary a bit between different trains. That's honestly not bad though. Depending on how bad the traffic is around Washington DC, I've made...

I have been looking for an excuse to take a long Amtrak journey. I'm going to check the options and see if the stars align.

Really nice ,thanks :)

That sounds good enough, You have a wonderful laser now, I'd keep it intact. Let me see if I can find an MRA core that lights/lases. I pulled the manual from storage, I need to scan it. Steve

At the moment there is only Argon 7.0 (99,99999%) and Krypton (99,9999%) available in austria.

you put the whole tube in a box filled with argon to prevent to get air in the tube while connecting?

At the cathode = full rebuild only. Through the reservoir is the other method, but painfully slow and requires careful means to manipulate the valves so as to not burn them out. Coherent has a very mean preventative trick waiting for you if you try to take the end bell off to weld in a new...

I'll express my support for this version. Steve

This makes the effort a bit clear. That means, you pinch the copper tube in the front near of the cathode or at another position? If you find time, it would be nice if you can send me the MRA Manual :)

Maybe another version of Steve’s submission?

Six nines after the decimal point or better 99.999999% Hydrogen, Oxygen, Nitrogen in the parts per million are too high. If you use "dirty" gas it will lase, it will then have a very short life. The difference is how the storage tank itself is lined and processed prior to filling.

I'm so glad that there is still someone who really knows their way around the old tubes ;) What grade of gas do you need, is this special made for laser filling or is there a product name for that special grade? Are you able to send a pic from your filling stand, i am very interested about...

The beauty of an Innova is the ability to move the bore and get around the dust. Dust like that appears when it was used to pump a dye laser in the past, and as they say about Horses in the US, "Ridden Hard and Put Away Wet", generating four or more watts to pump the dye. It can go a long,...

Greetings, all; I gave a talk yesterday to an ILDA Zoom thang about my new laser art piece, Alien Black Box. More info here: https://illuminatuslasers.com/alienblackbox.shtml This piece uses stepper motors to move the lumia disks, and people were interested in sourcing. Here is where I...

Thanks Steve for all the information. I will now always let it run as long as i have time. Two things i have noticed. 1) small parts are sticking inside the front brewster. that might also be a big problem. They are "new" because from the last cleaning session the brewsters were clean. ...

see attached, this is typical of the 910,920,930 family of medical lasers... Your laser was the top deck under the wood lid of one of those... Around 250 KG without the crate and ophthalmic gear. Steve

Dean Glassburn closed, Evergreen Closed, Cambridge Lasers Closed, Dynamic Laser does Aircooled and He is closing the business. That leaves me for long tubes in the US, and I have the tooling and rare gas. I also have MRA magnets, the Pinchoff tool , Ion Pump, Turbo Pump, etc, so you would...

You big show off! ;) ;) ;) ;)

https://youtu.be/_8JMVl-_KKs?feature=shared

Perspective, literally, visual perspective is the key here. Greg is correct. Each pendulum is on a graduating smaller length, front to back. Look closely at the start of the video, the long wooden board strip is not level...because of the different pendulum lengths, longer in front, shorter in...

Could it be the pendulums are of differing lengths so each is swinging at a slightly lagging or leading period to the next?

Now it runs since 2hrs at 25Amps and the voltage dropped from 223,9V to 223,4V. Do you have a U-I chart or field service manual etc. for this type ? Is mr. glassburn still active in laser business?