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Yes. a green laser isn't really green at first it's actually 3 lasers in one! which is why they are more expensive than diode pointers. ;) They're an 808nm IR diode pumping a crystal to get 1064nm IR light, which is then frequency doubled to 532nm light which we see as a bright green. The...

the Viper is the 55mW green I assume? (It's been a while) I've a yellow version and it works fine with both AAA primary and rechargable cells. Though on the NiMH batteries it tends to die faster due to the high current draw. Primaries will often work better due to their higher initial voltage...

Yeah about that age, and a bit older on occasion. But that’s a topic for later. I Don’t want to De-rail the thread. :)

This is pretty much my thoughts on the matter as well. There is no replacement for good safe practices and caution. A good life vest and a waterproof, very long throw flashlight is probably the best solution, but ultimately, like a lifeboat or anything else, they are a precaution. The best thing...

I'm at a pretty strong disconnect with this place now due to my inactivity and alot of the members i was friends with not being around anymore. I'm still around though. I just keep a silent vigil. People know how to get ahold of me if I'm needed. My expertise is mostly in gas, and few people...

yep. healthy output for one of those is usually around 3mW of red if the output mirror is clean iirc.

Yes. I helped make one. There's a very similarly designed one out here I used to run. It's been long since retired though, and it does orange not yellow.

That's why dye lasers were used for so long. They're very versatile....just really messy and large.

It's not that we want to dissuade you. But I think everyone here just wants you to understand what a pain it is. Greens are very easy and forgiving. but if you want to make a yellow you'd need your own mirrors at the very least, and they would not be cheap. any other parts you would need to be...

Making one isn't much more complex than a green. But it requires lots of specifically made parts and is much more tempermental. Buying the parts individually to try to make one is often far more expensive than just buying a retail unit. It's not like a green where the parts are common and you...

of course you cant run a transformer on DC. *rolls eyes* gimme a break Cyp. The answer is indeed in the above post. As that's the only way to really modulate a HeNe. You can't fully start and stop it, as that'd be very hard on the tube and starting circuit, like you would a diode. It is analog...

Holy! I've actually been looking for one of these. I used to play with one as a kid in the tech lab at school. Very neat to see there is one still around. They require a 12V supply at about 2A (at the HeNe supply inputs anyway, not sure about the back plug). but I don't recall what polarity, The...

Yeah, they're soft seal, but they are fairly robust overall, most of the ones i've seen that are still in service work fine. might need a little cleaning though. I'd give it a good home if I was close enough to pick it up. I have no place to put it though, nor do I have any way to transport this...

I agree. many older units are specific, but more recent ones are universal. It will be very important to look over the unit carefully and give all the info you can. If it was labelled 110 on tape or something, then odds are, that is what it is set up for.

Indeed, I can only imagine what these cost new. Fantastic supply. shame it doesn't have the desktop feet. I'll be using it in that config rather than as a half-rack mount.

Got it the other day. Works great. Thanks a bunch. I've been needing a high current supply for a while now.

Yeah, I wouldn't be too worried. air cooled, fully sealed ion tubes generally don't care if they sit if they were properly manufactured. Usually it's the large ones that have manual gas feeds and such that weigh like 100 lbs that need babying. most little air cooled tubes don't mind too much...

Well. technically there's alot of factors that come into play for heating things/"burning" things with lasers, but the three biggest things are often power, absorbtion, and beam profile. wavelength doesn't have a ton to do with it for your purposes, except in relation to what your burning being...

That would make sense for those lasers. Those Melles griot ones are mainly made for alot of their lab lasers and HeNes. almost every MG laser i've ever had has about a 1mm output or slightly smaller. so the 2.5mm opening is very good. the one that I have is a 20x and it is very nice. perfect for...

I think it wouldnt be too haard to have someone who can do machining or 3d printing to make them. they're not hard t o make.