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Old 07-19-2010, 12:33 PM #1
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Default NEC GLG-3030 glass argon laser tube, pics.

Hi all,
Just received a NEC GLG-3030 argon ion laser head in the mail that's been sitting around someone's garage neglected for years. The photo shows the condition it was in when I got it.
I stripped everything out of the head, gave it a bit of a clean and connected it to my NEC argon power supply using a different starter. After so many years, second click and it fired beautifully. It looks absolutely amazing when it's running.
Here's one photo so far. Will post more soon of the tube running.


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Old 07-19-2010, 12:48 PM #2
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Default Re: Nec glg-3030

Did you get this one from Dave @ LSP? I remember him mentioning he had one of these a while ago.
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Old 07-19-2010, 01:23 PM #3
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Default Re: Nec glg-3030

No....I followed up an old contact from ages ago.
What's LSP?
How's your power supply going anyway, things?
Cheers.
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Old 07-19-2010, 01:32 PM #4
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Default Re: Nec glg-3030

Ah OK

LSP = lasershowparts. Based in Melbourne, so thought it may have come from them.

I received the replacement MOSFET's the other day, just been too busy to try wire it up.

I had a triac explode in my face yesterday, not looking forward to a MOSFET doing the same if it's not the only problem with the PSU

Cheers,
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Old 07-19-2010, 01:37 PM #5
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Default Re: Nec glg-3030

Don't forget to replace that resistor.
I wonder if you could use a variac to slowly wind up the voltage.
I hope it works great for you.
Let me know....
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Old 07-19-2010, 05:54 PM #6
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Default Re: Nec glg-3030

Nice score Rob! When Ben see this hes gonna have flashbacks from the days when he had a GLG-3030.
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Old 07-21-2010, 03:23 AM #7
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Default Re: Nec glg-3030

Very nice little laser head you scored there! What's the output power? Multiline?
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Old 07-21-2010, 07:15 AM #8
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Default Re: Nec glg-3030

Wow Rob, yes PLEASE post a picture of that running...

Is that one of those "bellows/accordion" mirrors on the OC side? Interesting, I've seen those in nonfunctional very old HeNe's, for "ease of adjustment" of the mirrors.
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Old 07-21-2010, 08:13 AM #9
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Default Re: Nec glg-3030

Quote:
Originally Posted by aryntha View Post
Wow Rob, yes PLEASE post a picture of that running...

Is that one of those "bellows/accordion" mirrors on the OC side? Interesting, I've seen those in nonfunctional very old HeNe's, for "ease of adjustment" of the mirrors.
Hey there!
Pics are coming as soon as I get a moment. I'm going to have to be quick with the camera as I don't want to run the tube too long without the fan.
Those 'bellows' things, I think, are to block out the room light between the tube, mirror and light detector. Maybe I'm wrong on that.
Don't you just love the thin bit of glass tube that's been coiled that joins to two ends? Real art! I wonder what that thin tube does.
I love the glow in these tubes when they fire. It's like the Aurora Borealis :-)
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Old 07-21-2010, 08:37 AM #10
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Default Re: Nec glg-3030

Rob, I'm guessing that little glass tube has a similar function as the "gas return hole" seen in the Uniphase "ceramic" type tubes?



... Just a guess.
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Old 07-21-2010, 09:38 AM #11
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Default Re: Nec glg-3030

I think you might be right.
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Old 07-21-2010, 09:42 AM #12
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Wink Re: Nec glg-3030

@Aryntha: you're right ..... the "coil" part of the tube is for make the path more long, so there's no risk that any arc shoot in the return gas path and blow it up
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Old 07-21-2010, 11:20 AM #13
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Default Re: Nec glg-3030

OK, here we go. Some photos of the GLG-3030 running....
Here's the tube with all the old guts stripped out, cleaned up somewhat in preparation for a new housing.


Tube warming up with filament ablaze


And here it is.....



Love to hear what you think.....
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Old 07-21-2010, 01:06 PM #14
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Default Re: Nec glg-3030 glass argon, pics.

Stunning! Always wanted to see one of them running in person. Also, as HIMNL9 said, that's exactly what it's for. If it's too short the arc will go down the return bore because electricity will always take the path of least resistance. If it does go down the return bore the laser is most likely dead afterwards. Although I have seen them survive.
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Old 07-22-2010, 03:28 PM #15
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Default Re: Nec glg-3030 glass argon, pics.

Is the OC on the cathode? Or is that just HR leakage?
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Old 07-22-2010, 03:31 PM #16
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Default Re: Nec glg-3030 glass argon, pics.

I was going with HR leakage.. but now that I look more closely, it might be the OC..

What a beautiful little tube! I love my JDSU, but it would be even more awesome if the discharge was visible.
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