- Jul 3, 2015
This is for a NUBM44. I want to put in cylindrical lenses.
No real need to wonder much other than wondering if that was worth doing why is it not done. It would already have been done 1000X over in commercial or hobbyist laser pointers, if worth doing--the real world being the real world and not a figment of imagination.I wonder if a sufficiently over-engineered graphite-infused PETG heatsink made using a 3D printer could give say 15 seconds of duty cycle (for the NUBM44)
Robert, thanks for all this detail.You may want to find a machine shop near you, here's one I found with a quick search that looks promising.
Here's some specs on one of mine, also if you want to use the 3XBE with a 6X c-lens pair on a nubm44 you need to use a sanwu G2 but if you use a NDB7A75 you can use a DTR G2 and you get even better divergence from the 7A75 with only a watt or so less output, I have a 7A75 doing 6w with a 6x c-lens pair and it's quick to light my fireworks at 20 feet away.
Of course you want your module hole centered and my output was made to hold the 3XBE by it's outside dia. but I went with a threaded plate, Rich has a tap for the odd sanwu 3XBE threads otherwise you can press fit a sanwu adaptor.
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How does the shelf attach to the host? I am going to see if I can use the shop you suggested or another one that I located awhile ago.7A75 as in NDB7A75 ...... it's twice the strength of a 7875 and half again the divergence, that is your spot/bar width will be 150% of a 7875 but 200% +the wattage. Really 3w is about the max from a 7875 @ 2.4a but I have had 7A75's doing 6.5w @ 4A but 6W is typical @ 4A with a good copper heat sink/DTR module although I have had some that will only do 5w but those were earlier production I expect, right now I have a 7A75 with some runtime on it doing 5.8w through a 6X pair, that's 5.8w out of the c-lens and it's primary is a G2.
You only use a portion ( about the middle 1/3 depending on the lens ) of your c-lens height so you have play, but you do want to make sure your lenses won't stick up too high and hit your cover, so depending on which lenses you use you can adjust the height, if you go low on the shelf you can always add a shim as thick as you want.
As a rule of thumb I make the shelf just below the module hole so it can be put in from either end.
I don't know what's up with Trinh but quick turnaround is not typical.