Re: FS: Sanwu Laser store - R/G/B handhelds x3 BE & Stainless steel "The Spiker" rele
70% is very pessimistic because all good laser diode have the maximum power concentrated in the center. I do not notice a difference in power between the G2 and my G7 barrel with all diodes (except red and it's almost not visible)
in terms of power it is impossible for it to exceed 20% in loss (I think more like 15%).
I order a LPM to check this
I agree with the hot center, but the rapidly diverging axis is very aggressive....I was thinking 30% clipping by volume in the case of the NUBM44 and the 12mm copper module, by power could be 20% as the G7 is 12% , I posted a pic showing where the G7 sits in the 12mm copper module when focused far field, how's the physical location compare with your 8mm FL lens ? How much thinner are your lens barrel's walls ? Can't be all that much in reality. I can speculate all day, do the power test and see.
Also I know from DTR's videos that the nubm44 with G2 @ 4.5a puts out 6.8w + and same but with a 3 element puts out 5.5w that's roughly a 20% loss in power. ((( Base on that I can say the G7 has to have less loss, it may hold the 88% or 85% ?? even with the 44's divergence because I can see it's a bit stronger, that's why I use them. The lens you buy may be the same that's in the G7, it's funny how it works out sometimes. )))
Again it's the aggressive divergence, do a power test with the Sanwu G7 and your G7 and post the results, I suspect they won't be much different except the Sanwu G7 is likely at optimum as it was purpose made for our favorite MM diodes at the time when the 7A75 was top shelf, and you will do well to match it because of the raw divergence and your 8mm FL.
With the NDB7875 you have a better chance of matching or possibly exceeding by a small amount, but the only way to know is to test and see. :beer:
Something else that strikes me is how strong the G2 and 6X cyl pair is, also when I get a NUBM06 with a decent focused GBall and use it with a 3X beam expander again I am impressed at how well it burns compared to my G7/3E and 3X beam expander units, this is no doubt because of the efficiency of the GBall lens vs. the clipping of the G7 and 3E lens......the print on the face of the beam expander fits with a 3 element and touches the edges with the G7, I can see there is some clipping of the weaker ends, this is another reason why using a short FL lens and CYL correction is by far the best way.
I recently picked up some 7A75 diodes and run them at 4.0a with a G7 and 3XBE, they give the nubm44 with G7 and 3XBE a very good fight, but cant touch the corrected set up, but that's also a matter of energy concentration at the target as well as the G2's efficiency.
*NOTE: For what it's worth I am not trying to argue or come across as terse, I am curious as to what numbers you get.
