I just received five SST-40 from this seller on Aliexpress, they turned out to be the real deal. There is of course no specific information about tint/bin but with my unscientific testing they seem on par with the one I bought from KD.
There is also a bit of green in the lower modes just like the one from KD. The MCPCB’s is not very good but that didn’t come as a surprise. The price has gone up a bit I payed $1.69 a piece.
Nice, I’m always a little leery of buying emitters for aliexpress, but they have done pretty well with flashlights and other things. One thing about them, if you order from them and they don’t come through, you get your money back, no problem.
After luminarium iaculator revealed his metode in this thread and I happened to be in Italy so I could buy the “magic” fluid they turn out great every time
Put my SST-40 from KD in a Convoy M1 with a MTN-17DD fet+1 driver and I Really like it. The tint almost has a purplish color to it at higher amps, but not in a bad way, very pleasing to the eye, especially for low CRI.
Tempting LED in all, but would be nice to have higher brightness bins available somewhere (for EU).
Still, 2000 Lumen at 20 Watts at 3.6 Volts and 5.6 Amperes is very nice.
The main difference is: when properly dedomed( its not that easy though, at least those samples) The tint didnt shifed much, like only 1000k or something , thus resulting in the best cool white tint( accoarding to the BLFers), like 6000k 1D or so, paired with an the AR glass even i like it.
I tried keeping it at about 7, 7.5 amps tops, to awoid burn-outs
Paied with a good fed dd driver it resulted at arround 2050-2080 lumens( at 7 amps) WHEN DEDOMED, measured with my spectrometer, candelas ( in most knows hosts) are as follows
C8 - 162000
X6 - 108000
L2 - 315000
B158 - 269000
I`ve modded a M3x torch with it too, using a boosted default driver at 7.1amps and it ended at 335k candelas
A very good emitter, especialy if you aint at a good cool white tint after dedoming, simmilar or even an idea better than W2-W3
Something interesting: even with a battery at 3.45v( a never charged brand new VTC6) it still gives 3.8 amps and 98k candels in a C8 host, a result better than most even high driven XPL emitters in that host
Nice to hear that report Mitko. I guess I could machine tube for your(mine) Mitko’s thrower and put the buck driver in. 7A for DD fet is not a lot of fun to play but it surely shows potential.
Edit: or longer tube with parallel craddle for 2x18650 and fed dd for a bit longer turbo times…
Looks good. The candela numbers seem consistent with djozz’s lumen measurements relative to the XPL V6. At 7.5A the SST-40 has about 14% more output than the XPL V6 at 6A (a typical direct drive current for this emitter). I usually get around 94Kcd from a dedomed XPL V6 1A in an X6, and 108Kcd from the SST-40 is a ~14% improvement.
Great new emitter. I’m still waiting on mine from KD.
Got my SST-40s in the mail. It may have too low a Vf for single emitter use (for my tastes). I was getting 8-8.5A with mostly charged cells (GA and 30Q at ~4.05V), measured using a 10mOhm shunt in place of the tailcap in a EE X6 with FET driver. Current seems a bit too close to the 9.6A that fried the LED in djozz’s test; too risky. Maybe better used in multi-emitter FET driver setups where the LED’s low Vf allows them to be driven better than XPLs and have a bit of a safety margin below the ~9.6A point.
Edit: I dedomed one using hot gasoline. The dome separated from the phosphor pretty cleanly in 20-30min. I made some small slits with a razor blade right at the base, as if I was starting to slice the dome off. I’ve heard of other people doing this. Not sure it had any effect, but thought I would mention just in case.
The jetbeam T6 uses XPL emitters, which have a different footprint on the MCPCB than these SST-40s. If you want more throw you could dedome the XPL emitters it came with. You would need to take apart the light and remove the MCPCB and learn a procedure to dedome the LEDs.
High Vf emitters are not so bad as we think.If you want single 18650 performer than run time should matter to.
And I hate to say but it seems that new production XP-G2(at least the one I have) gives the most optimal performance at very low current draw (XML2 or XP-L performance at only 3,6A current draw with even larger beam than good old XP-G2).
3,6A! Light never gets hot and performs superb. I should slap myself out when I was speaking against new production process XP-G2’s cause they ain’t that bad after all… At least for fed dd drivers.
I received four pieces sst-40 yesterday. All four had scuffs and nicks on the domes. It’s not much but I don’t like it. So I guess I’m going going domeless. :cry: