Hey All,
I am interested in upgrading my BLF GT with an sbt90.2 LED. Does anyone know if there is an sbt90.2 MCPCB that will fit? Or even better would be the full upgrade kit like was available for the XHP70?
Thanks!
I would like to know as well. Would definitely be interested in a conversion kit.
I would start by contacting Vestureofblood here who runs Adventure Sports. This seems right up his alley. Also Texas Lumens who designs the boards. With 8-18650’s the output would be wild.
You mean the sbt90.2? It is an upgrade over the sst-90 from what I’ve read.
Yes thank you.
There has been much interest in this, but it has been brushed off as they would rather sell the entire light for much more cost then help us upgrade something, we already have that is outdated. With that being said if someone can make it happen reasonably I’m in. The other issue is I could be wrong, but I do not think there is a warm version of the sbt90.2 which just ends up turning the light into a lightsaber and melting everything in its path.
I’d ordered the BLF GT70 conversion kit from nealsgadgets. After a month I emailed to find out the status, order cancelled and refunded.
I definitely want to upgrade it, maybe I’ll have to pay someone to do it for me.
I think if we could locate the parts that fit the best (even if they aren’t perfect) that would be a good start…
TexasAce on this forum used to sell the conversion kits for the GT/GT70, but I think his supply dried up. You might want to PM him to see if he has any, otherwise you’d need to find the right mcpcb, driver, and modify the battery carriers for parallel, not series/parallel.
Here is a pic of Texas Ace kit, no longer available. For reference.
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You can get some parts, but I cannot find the battery carriers or a driver. Neal Gadgets may be possible.
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luminus-sbt90-2-led Cool White: 5700K on 32mm diameter by 2mm thickness mcpcb. It is smaller but it may work.
You might ask Victor Zhou from Lumintop on FB Messenger.
Carriers can be done yourself, see THIS thread.
Great info, thanks. Maybe someone that has done the mod can comment on if the 32mm sbt90 would work.
You’d think they’d be happy to sell a kit - I’d want to upgrade my blf gt even if I bought a gt94…
I don’t use facebook, maybe i’ll try their website contact.
Bumpety bump.
Anyone have a decent idea how to perform this mod in 2024? I still got my original GT, but that reflector (and mass) would be much better put to use with an SBT90.2 than the old XHP35 …
Convoy seems to offer the SBT90.2 on 40mm MCPCB for a rather reasonable price. It’s 5mm smaller than the original MPCB, and centering probably would be a bit of a hassle, but could probably be made to work, I suppose?
The carriers are a hassle, but the linked thread above provides a (somewhat cumbersome, but doable) solution for that at least.
So, the remaining main issue becomes the driver - Someone recommended the BLF Q8 driver, but at a quick glance it doesn’t seem to be available anywhere at the moment, and would also require modding to make contact with the carriers?
Other suggestions?
Convoy sells the 3x21D driver, but it’s only 40mm in size so a bit too small, and the Convoy ramping really isn’t as nice as on proper Narsil lights 
. Additionally, it would also require modding to match the carrier battery positive terminal.
A cheap donor light might work too for the driver, but high amp 3v drivers in the 50mm size aren’t really the most common thing, especially in the budget department 
…And on a related note, anyone have tips how to remove the driver section from the top of the head/reflector part of the light? Mine seems to be really stuck, almost like it’d be glued on - can’t remove it by hand force
I would like to do the same thing. Hopefully there is a solution to allow this to happen.
First try to do it the same way that other people have done it in the last few years. See if you can get some of the parts from Lumintop and work from there.
So, long time no update, but FYI in case anyone else is looking for a solution in this day and age;
Lumintop didn’t give any answers through email when asked for a spare driver. On their aliexpress store I managed to get a reply and they said “they will look into it” if they have any spares/old stock laying around, and then nothing. So that was unfortunately a dead end.
Meanwhile, I’ve ordered the 3v MCPCB:s for the battery carriers from JLPCB using the files in the other thread. Was easy, no need to mess with the contents yourself.
The driver was the biggest hurdle after this, but after hours and hours of scouring Taobao for flashlight and led junk, I eventually managed to find;
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a 50mm MCPCB with an “NBT160” SBT-clone.
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47mm sized “violent flying andrew”(Anduril? Thanks google translate :D) 3V driver, to be paired with an SBT90, originally apparently made for the Dongdonghai DDH8 host (seller pic);
…However, I also managed to stumble over another seller that was selling a 4000K version of what I assume is either the “L90”, or Fireflylite FFL909MX equivalent led;
A 4000k version would be much nicer in my opinion and more in line with the original GT, but the hurdle with that is that this would have to involve me trying to reflow the emitter on a MCPCB with a heatgun or some other jerry rig setup myself, which I’ve never tried before, so high chance of me just frying the emitter to a crisp and getting nothing in hand.
I also wonder if there’d be any easy way limit the max current of the driver (thinner wire swap?)? The listing description mentions to “use double wires if you want more than 35A” of power, but personally I’d rather set the top level to something more slightly sensible like ~20A max. I suppose you could set a new max ceiling level in the ramp, if the light really has anduril, or?
The carrier PCBs I got already from JLPCB, but some some of the china stuff I’m still waiting to arrive, so this will be sitting for some more time. I’ll try to post an update if/when I eventually manage to finish the conversion project 
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4 Thanks