Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers



Laser Pointer Store

Where to buy?

Fill

New member
Joined
Oct 9, 2018
Messages
3
Likes
0
Points
1
Sorry if this is a retarded question, i just got started building lasers and cant find anywhere to buy laser hosts, and also is dtrs laser shop still alive?
 

RedCowboy

Well-known member
LPF Site Supporter
Joined
Jul 10, 2015
Messages
7,026
Likes
1,761
Points
113
DTR is not taking orders on ebay, amazon or his shop at the moment, don't know why, he's been down for a while although his shop is getting a remodel so .......

You can order some items here > https://www.ebay.com/str/Barnett-Unlimited?_trksid=p2047675.l2563

p.s. May have to get Rich/Lifetime17 to make some copper modules if this continues.
 

Fill

New member
Joined
Oct 9, 2018
Messages
3
Likes
0
Points
1
Thanks, and after searching for a bit i found out you can buy of this forum, seems a bit sketchy, is it safe?
 

RedCowboy

Well-known member
LPF Site Supporter
Joined
Jul 10, 2015
Messages
7,026
Likes
1,761
Points
113

Fill

New member
Joined
Oct 9, 2018
Messages
3
Likes
0
Points
1

paul1598419

Well-known member
Joined
Sep 20, 2013
Messages
13,856
Likes
1,994
Points
113
If you know which diode you want, you can often find them cheaper on eBay from sellers like Techhood, Newgazer, Existotem and LaserLands. Laserland.net is cheaper than eBay if you find something that LaserLands has on eBay. I am hoping DTR will start filling orders again soon. I am down to 1 TO-5 12 mm module. I still have a few TO-18 copper modules but I do prefer the copper modules DTR supplies over the much cheaper Chinese version of the AixiZ nickel plated brass modules. I see Barnett has NDB7875s in stock for anyone looking for that diode. $29.95 isn't bad for that diode, but you can buy the other diodes, lenses and other items cheaper from the Chinese sellers on eBay.
 
Last edited:

RedCowboy

Well-known member
LPF Site Supporter
Joined
Jul 10, 2015
Messages
7,026
Likes
1,761
Points
113
We need copper modules, without copper you lose output to heat fade faster, especially in the case of the 5w+ overdriven 9mm diodes, they need the copper back half to pull heat from more than the diodes backing plate edge.

I have some but not enough to sell any, I am thinking Rich/Lifetime17 can make some if anyone needs then ask him.

Also I think a copper module back half without the pedestal would be better, like the way Rick Trent makes his copper modules to get a better purchase on the backing plate.
 
Last edited:

Lifetime17

Well-known member
LPF Site Supporter
Joined
Dec 15, 2014
Messages
4,677
Likes
1,344
Points
113
Hi,
The Vets here will steer you in the right direction so relax they will not misinform you on a purchase or safety issues ,

Rich:)
 

BowtieGuy

Well-known member
LPF Site Supporter
Joined
Oct 14, 2012
Messages
5,398
Likes
1,899
Points
113
If you want Laser hosts, ^^^^^ this guy ^^^^^ right here is a good place to start for high quality custom hosts, just check out his signature! :)

Sorry if this is a retarded question, i just got started building lasers and cant find anywhere to buy laser hosts, and also is dtrs laser shop still alive?
 

steve001

Well-known member
Joined
Jun 3, 2007
Messages
2,159
Likes
388
Points
83
I was wondering if i should get the 7w nubm44 module or the 2w m140 module, the thing is i'm concerned that the beam divergence on the 7w laser is to much when looking at the beam at night, is it to noticeable if you used a 3 element lens?
An expander will decrease the fast and slow axis. Will it still be noticeable yes. But your personal level of tolerance is what matters. A suggestion would be to use a cylindrical lens pair to correct both axis. Or just one cylindrical lens to correct the fast axis. That will create a square-ish beam that at some distance will look round.
 

RedCowboy

Well-known member
LPF Site Supporter
Joined
Jul 10, 2015
Messages
7,026
Likes
1,761
Points
113
He may want to start with the m-140, but remember that that too must be respected, laser safety glasses must be worn when working with any of these lasers, of course you can view the beam that terminates far field as long as you do so safely, but when working up close safety glasses are a must, and beware of reflections.

Yes the divergence of the NUBM44 is 3 times as wide as the m-140, with a 3E lens the m-140 looks like pretty much like a beam when shown into the far field, but the 44 makes a noticeable line, granted the m-140 makes a line 1/3 as long but is looks a lot better to the naked eye when viewed safely, even at short distances viewed through laser safety glasses you can see how much more divergent the nubm44 is, all mine use beam expanders and/or c-lens correction, for desktop duty I still enjoy a 7875.
 
Last edited:

paul1598419

Well-known member
Joined
Sep 20, 2013
Messages
13,856
Likes
1,994
Points
113
The M140 diodes are great for getting powers just over 2 watts when driven at 1.8 amps and paired with a short focal length asperic lens. You can get the lens on eBay for $8.00 or less and the diode is very inexpensive at less than $17.00. It is a good burning laser at distances up to 10 feet. It will burn into wood quite easily. Not a bad choice for a first build.
 

hakzaw1

Well-known member
Joined
Apr 2, 2009
Messages
9,355
Likes
1,430
Points
113
''Sorry if this is a RETARDED question, i just got started building lasers and cant find anywhere to buy laser hosts, and also is dtrs laser shop still alive? ''

Please do not use that word here-- it is offensive and unkind.

if you cant find hosts?? where are you looking?? duh
DTR shop is temp closed.. & he does not sell many/any hosts and no completed lasers.
see Jayrob- Lifetime- Flaminpyro- or post a WTB in the BS&T section-- someone will have one FS..
 




Top