If Lumintop would be interested I would finalize my very high current driver for 3V LED from 2S battery
The head part would be needed to machine out proper parts for thermal pads to get an efficient cooling, but even without that it might be enough to get rid of about 4-5W heat
Sounds too difficult for entry level modders, most people just want a conversion kit (as with the XHP70) driver, mcpcb with LED and different battery carriers for 4P.
There is no modding if Lumintop would release a SBT GT
4S would need a way bigger inductor size than 2S or current had to go down a lot
At a current like 35A you cant make an easy mod, I bet also the K75 has dedicated heat pads to cool components on the driver
Things get toasty at that high currents even with 95% efficiency
My 3 ordered SBT90.2's arrived today. I got a couple spare GT's to play with. The LED's are a big assembly - no idea how I'll fit them in a reflector. Might be better off in a zoomie for now. I got a couple big zoomies - the 1504. Betta it would be interesting in one of these...
I did dismantled my K75 and soldered some cables between the driver and led to measure current. Results
Low 500ma
Mid low 800ma
Mid high 2.7A
High 5.9A
Turbo 28.7A
How do you plan to driver them and at what current? I have some GT reflectors for scratch builds, a massive triple with 3 GT reflectors would be fun but the power needed would be huge. I have 6 on order and im going to need drivers.
Straight FET or FET+1. Doesn't need anything special. Even the SIR800DP can handle the amps, but I have better FETs. If the K75 can do 28 amps, should be able to match it, or little better perhaps.
That's pretty good #'s. The 1504 unfortunately is designed for a 16 mm MCPCB - forgot bout that, but looks like I could dremel it out to about 19 mm, so might do that. The other high performance zoomie is the Brinyte B158 - I got one with an empty spare brass pill, and that's for a 20 mm MCPCB.
I finished the 1540 mod, details here: https://budgetlightforum.com/t/-/59274/40. Not getting the amps I was hoping for, but it's not fully tweaked for high amps - should use a better FET, thicker wires, etc.