I did solder a spring but it was from another green laser. It's dead center and soldered very securely. I don't think it was anywhere near touching the inside of the pen. Also, it was in use when it first dropped in power. It didn't blink off for a moment which would have been evidence of a short. One module failed. No biggie. I don't want to turn this thread into negative feedback for FastTech. They are taking care of the problem. I'll report back when I get my replacement.
Well I'm also not trying to make this a negative tread as well, but where trying to determine if it was a user error or the module its self. I've have about 15 of these module and been the only one with a bad on so far and it was still working just very under spec. And even my oldest is still working about spec. I do know first had if you overturn the pot it will start out bright and drop power within a second. And if your luck you can turn it back to restore power. And you said you didn't touch the pot before placing it in your unit so that rules that out!
Nice review Blord I just ordered a 100mw violet for 9.34 from fasttech..sweet,I love a bargain.I'm hoping it will drop right into my 50mw 532nm(host).Got it off fleabay for 15.00 shipped.Do you think the al collar is enough of a heat sink for a 100mw?
I actually removed my module and unscrewed the back, and even without all the unnecessary optics, I still get a crooked beam coming out at maybe 5 degrees off where it should be? So my guess is that the crystal the diode is pumping got epoxied in slightly crooked, or maybe the wavelength doubling crystal....either way, probably just a result of how cheap it is. If we wanted QC, we would pay more.