I would like to see as well.

I have tried adding a R050 over the existing resistors , for a ~30% increase in lumens . I can’t remember exact measurements .

I think Mitko has done extensive testing on modding the Ut02/U21 driver .

I have also tried more mods for my Ut02 , but they require a different driver :

fet driver and xpl hi v3 for 180-190kcd

fet driver and dedomed xp-g2 for 290-300kcd (900-1000 lumens)

From post #532

LEDtec wrote:

few weeks ago I received my UT02 CW (1A ordered, but in my opinion is a 1C), even on my I measured only about 2.4A at the tail-cap.
Last weekend I replaced the original resistor R05 with a R01 getting 5.6A, but with only two brightness levels, so I replaced it with a R018 getting 5,4A and 1390 lumens and with all levels perfectly functioning.
Then I did the bypass spring and I got 5.6A and 1,450 lumens.
Now I am very happy with this little thrower , I hope the driver resist.

sorry for my bad english

I tried to replicate this mod but that little resistor was beyond my skilset

I’ve been ondering if there are any weak link components on the origional driver that could be upgraded to reduce the risks of resistor modding? Mitko had a diode blow on one of the early manker models. I tried to prove for more information but was never replied to.

You can upgrade the inductor, the FET, the diode and then do a resistor mod.
That reminds me of the mod i was doing on the MT03… Should pick that up again soon.

If you change the diode and do the resistor mod it should be good to go for years .

It’s better to pot the driver too.

What diode needs to be changed?

KawiBoy1428 wrote:

What diode needs to be changed?

Im also interested here.

These are really nice de-domed if your up to the challenge?

http://www.kaidomain.com/p/S026063.Cree-XHP35-HD-E2-1A-White-6500K-LED-Emitter

You could give them a close Shave and make your own HI too!

10fp wrote:

hav put a 075 resistor on top of the shunt and now pulling 5 amps , heaps better and was Very easy to do

Now i just want to go a bit cooler than NW , Can U guys recommend a better xhp 35 maybe around 6000 tint ?

5amps is too much for XHP35?

im yet to mod mine and im very tempting.

do you have any issues after the mod?

Nicolicous wrote:

10fp wrote:

hav put a 075 resistor on top of the shunt and now pulling 5 amps , heaps better and was Very easy to do

Now i just want to go a bit cooler than NW , Can U guys recommend a better xhp 35 maybe around 6000 tint ?

5amps is too much for XHP35?

im yet to mod mine and im very tempting.

do you have any issues after the mod?

UT02 uses a boost driver , 10fp says 5amps draw from the battery

thanks George.

I want to mod mine right now

do you have a photo where to replace the resistor? just incase i stuff up

found it

I love the UT02 as a host. The (old school) XP-G2 de-domed was one of my favorites!

Pulling over 6amps and throwing over 300kcd it was a laser beam jacket pocket rocket thrower!

But for a Bombastic Boomer I use the XHP70.2 UT02 the most. With the Lexel built T/A Narsil driver, copper driver adapter’s, I then bored the head out for a 32mm Maxtoch board, used a Convoy L6 white switch boot and wired off the driver, with resistors, lighted up the stock e-switch, blue or red, but I liked the red only, for DANGER!

The 70.2 P2 1A at 8+ amps is quite impressive out of this smaller light, nice over all beam with a large Hot spot with this smooth reflector.

Oooo… I like the clear switch boot. Ima havta git me one of them! Did you get the boot from the convoy store? How is the beam looking?

LightRider wrote:

Oooo… I like the clear switch boot. Ima havta git me one of them! Did you get the boot from the convoy store? How is the beam looking?

I like the P2-1A the best so far, less of a brown/yellow corona, ring, then say the B-C’ I have tried. The beam is white, not cold blue-ish, like the P2-1C as is the ample spill. The beam is naturally big, coming out of a short reflector, but it lights up the neighbor across the street back yard/driveway like daylight so it has decent trow for a small reflector. It would make for a nice patrol light, even say half way up the ramp it is more than enough light, but then double click for Turbo, yeah there’s no where to hide!

I’m looking at getting a couple more of these UT02’s if I can find them for the $28-$30 price I got the last 4 at? I found some interesting other 70.2’s at Mouser I want to try out. They describe them as a white/white 5700k and a white/warm 5700k? They are P2 bin but 0E and 40E?

gastonpatagonico wrote:

Hello, just add r100 to the driver and get about 119000 cd in nw verison with liitokalas 26650 fully charged

Where’s the best place to find these resistors? They are 0603 resistors correct?

I’d like to join the question…

did u get your from cutters.com.au?

so they have genuine E2 3C?

few members here have question about them

got my order yesterday but yet to test them out.

will do lux reading this weekend. Im expecting higher lux reading than stock LED from MF02

i have UT02 NW and CW

as well as two Astrolux MF 02 throwers

will swap them all and check the lux ready this weekend