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- Jul 10, 2015
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The GBall is a single element with a longer FL like the G7 and it is very efficient like a G2, I remember a power test DTR did of an 06 with the GBall and with a G2 and the numbers were very similar.
The problem is they are fixed at a less than ideal focus, many are focused very short such as just inches away, that makes for a big spot across the room.
Others are focused closer to infinity, with a beam expander you will find some that burn good at 5 to 20 feet also burn with a longer but razor sharp line at 50 feet through the beam expander.
I have had many but most are dead/weak now from running de-canned, I have a couple that came with a pretty good focus that work well with a beam expander and nothing else, just the factory GBall intact and a BE, it's G2 power with a shorter spot far field, and although the spot at 15 feet isn't perfectly sharp it burns very well, I am thinking of trying the backwards G2 followed by a recovered GBall, so far they like to shatter when I try to cut them from the can, but maybe I can just trim the can, will be a project as I expect future diodes may be GBalls.
Light Transmission
G9 = 96%
G2 = 95%
GBall = 94%
G7 = 85%
3E = 70%
Here's an old video of an NUBM06 with GBall intact that has an ok focus, not perfect but not terrible. THIS IS WITH THE FIXED GBALL INTACT.
When I find a GBall diode with a pretty good focus I simply use an emptied out 3E lens barrel and the 3XBE with its adaptor and a spacer/washers, then it will focus to burn across a good range of 3 to 30 feet or so, the good part is the power is high as the GBall is efficient.
The wide end of the empty 3E barrel will fit over the GBall when screwed into the 3X adaptor, just use a spacer/washers to keep from crushing it.
This was an NUBM05 with GBall intact and a 3XBE, I got bored one night and de-canned it, now it's long since dead yet my GBall intact 06 lives on.
The problem is they are fixed at a less than ideal focus, many are focused very short such as just inches away, that makes for a big spot across the room.
Others are focused closer to infinity, with a beam expander you will find some that burn good at 5 to 20 feet also burn with a longer but razor sharp line at 50 feet through the beam expander.
I have had many but most are dead/weak now from running de-canned, I have a couple that came with a pretty good focus that work well with a beam expander and nothing else, just the factory GBall intact and a BE, it's G2 power with a shorter spot far field, and although the spot at 15 feet isn't perfectly sharp it burns very well, I am thinking of trying the backwards G2 followed by a recovered GBall, so far they like to shatter when I try to cut them from the can, but maybe I can just trim the can, will be a project as I expect future diodes may be GBalls.
Light Transmission
G9 = 96%
G2 = 95%
GBall = 94%
G7 = 85%
3E = 70%
Here's an old video of an NUBM06 with GBall intact that has an ok focus, not perfect but not terrible. THIS IS WITH THE FIXED GBALL INTACT.
When I find a GBall diode with a pretty good focus I simply use an emptied out 3E lens barrel and the 3XBE with its adaptor and a spacer/washers, then it will focus to burn across a good range of 3 to 30 feet or so, the good part is the power is high as the GBall is efficient.
The wide end of the empty 3E barrel will fit over the GBall when screwed into the 3X adaptor, just use a spacer/washers to keep from crushing it.
This was an NUBM05 with GBall intact and a 3XBE, I got bored one night and de-canned it, now it's long since dead yet my GBall intact 06 lives on.
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