Water Cooled Flashlight Modding a MT35 PLUS RE-MODDED

CNCman · 2021-03-14T14:35:55.000Z

Still getting things ready for some testing on the light and making a Lumen tube to check it also.
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I was not sure how the driver would handle long run times so we decided to add a copper heat sink to the rear of the driver with Artic MX-4. There is 3mil tape in the area of a possible short.

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The light was coming on when the battery tube touched the spring and not when seated. So we turned the outside diameter and taped it.
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CNCman · 2020-09-06T01:51:01.000Z

Finished compact battery holder.

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Just under 8 amps @ 12 volts. Guessing around 8500K lumens, not able to get accurate readings yet.

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8 inch lumen tube is not calibrated yet, guessing it’s reading high 2K.

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Re-plumbing with good tubing.

Beam shots don’t really show how nice it shines.

low ramp start.

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25010 lux at 6.46 meters is 1,043,707 CD and 2043 meters throw, approx 8500 lumens.
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This light just blew a mcpcb 1 day after I changed a burnt XHP70.2. I will fix it again with another modded mcpcb.
Texas Ace has a Luminus 90.2 kit ordered I will probably put in, but that will require more invasive work, so I may put that kit in another big light.
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I know this light looks strange, but it is an experiment in heat control. If were possible to find a very small pump, it would be possible to incorporate the cooling into the head ( no exterior tubing ), and improve its appearance.
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originally MATEMINCO MT35 PLUS, XHP35 HI, 4 x 18650 batteries
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I want to Thank the many BLF members who helped me during this mod.

Tally-ho · 2020-09-06T17:58:44.000Z

The water-block is genius, so how about taking advantage of the length of the battery tube for cooling the water temperature ?
Something like a battery tube with milled fins on the whole length and the water pipe going through the fins. Sorry for the 4 years old kid drawing

CNCman · 2020-09-06T12:39:48.000Z

I never thought of going around the battery tube and adding a handle, Good Idea
Definitely looks better too Yes, that is the way to do it, wish I had thought of that in the beginning

grin · 2020-09-06T13:03:14.000Z

I couldnt think of a good way to do build water blocks but your builds have given me some good ideas to work with.

kennybobby · 2020-09-06T14:57:42.000Z

The_Fat_Controller:

Well, when they show a wavien collar…
You can see there he has picked a lens with a monstrous 100mm+ FL to make the effect as dramatic as possible.

Thank you for post #44 that very informative vide and your beamshot, quite impressive.

CNCman · 2021-03-14T13:26:13.000Z

grin:

I couldnt think of a good way to do build water blocks but your builds have given me some good ideas to work with.

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This one is much cheaper and easier to make.

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grin · 2020-09-06T17:32:08.000Z

They are both well done.
I am thinking the copper tube with a web soldered between them so it is similar cross section to an I beam would be rigid enough to take the place of a spider.

CNCman · 2020-09-06T21:35:53.000Z

grin:

They are both well done.
I am thinking the copper tube with a web soldered between them so it is similar cross section to an I beam would be rigid enough to take the place of a spider.

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Mine are overkill in size, you can go much smaller because the water will take the heat away, just make sure the pump is on before the led.
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I’m searching for a front mirror coating also, found this one for glass, it might work on aluminum. Just need to learn the process, not buy the kit, its expensive.
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angelgilding.com

Pump Spray Silver Kit

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MascaratumB · 2020-09-06T23:05:14.000Z

This is a great build :o

Well done CNCman

grin · 2020-09-07T02:05:33.000Z

Sorry wrong thread

CNCman · 2020-09-07T01:06:18.000Z

Thanks for the comments BLF’rs
Sorry it took so long to finish.

Sirstinky · 2020-09-07T02:18:04.000Z

Awesome project. I wish I had a lathe and mill to do all that you do. 8500lm is nothing to scoff at for sure.

lumenzilla · 2020-09-07T04:47:35.000Z

If the water pipe is transparent, I’d like to see it with fluorescence and UV light to “ignite” it

CNCman · 2021-04-04T20:06:40.000Z

After burning a few mcpcbs and leds it was time to correct some misjudgments in function and appearance.
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The 20mm mcpcb was upgraded to a 32mm and the 20mm pocket was filled with a copper coupon and soldered in place. Then re-surfaced, drilled and tapped for mounting screws.
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A new centering ring had to be machined and fitted in place with a dremel tool. Very difficult to get it right, took 3 attempts.
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Relocated the aluminum cooling coil and resized it with the correct amount of cooling capacity, previously overkill.
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Machined a battery tube adapter to combine two short tubes.
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Rewired everything with shorter wires.
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Didi-Key XHP 70.2 5700K dedomed led.

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The centering ring was very challenging to machine.

The wires had to be held down while soldered.

Side view showing inlet and exhaust tubes.

Ready for installation.

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FINISED

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Left XHP 70.2 …… Right Luminus SBT 90.2.

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The led was from Digi-Key at XHP 70.2 5700K before dedoming.
The driver is 12v 8amp from Lexel with 5v power supply for pump.
Runs cool and only gets warm in warm weather.
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The dedomed Digi-Key XHP 70.2 5700K performed much better than the 6500K dedomed Mtn. Electronics led.
12V 8Amps on turbo
1.372,969cd
9,200lm
2,343m throw
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Specs for Luminus SBT 90.2 not water cooled.
3V 22 amps on turbo
1,829,513cd
5800 lumens
2700 meter throw

MT35 Plus with SBT90.2 mod ( GT90 kit from Texas Ace ) Flashlight Modding and DIY Parts

Hi all I purchased this kit from Texas Ace last yr with the intent of buying a used GT with the original xhp35 led. Well that idea was a bust, nobody was selling that GT and the new ones were out of my price range. So after 3 months I gave up and ordered a new Mateminco MT35 Plus instead. So from start to finish we go. . Here is the original being disassembled. [image] [image] [image] [image] [image] [image] [image] [image] . The kit is in the lower area, 2 x battery …

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It is hard to beat the XHP 70.2 when driven hard.
A lot has been promoted about the SBT 90.2, but the proof is in the beam shots.
When standing behind the two lights, I give the 70.2 my vote.
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Enderman · 2021-02-01T01:11:14.000Z

Very nice job on the MCPCB modifications
Great performance results.

CNCman · 2021-02-02T00:46:16.000Z

Thanks Enderman.
I have watched several of your builds and they inspired me to try new things.
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Enderman · 2021-02-02T01:23:42.000Z

CNCman:

Thanks Enderman. :sunglasses:
I have watched several of your builds and they inspired me to try new things. :heart_eyes:
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Yay I’m glad I could inspire people with my builds
I wish I had my own lathe and mill to do stuff like you tho haha

Skylight · 2021-02-08T21:03:48.000Z

The water cooling in black now looks like it really belongs there. Nice to see how you improved the copper heat sink, the MCPCB and the whole water cooling system. Very neat and professional.

Really useful comparison of the dedomed XHP70.2 and the SBT90.

CNCman · 2021-02-11T22:51:51.000Z

Skylight:

The water cooling in black now looks like it really belongs there. Nice to see how you improved the copper heat sink, the MCPCB and the whole water cooling system. Very neat and professional. :+1:

Really useful comparison of the dedomed XHP70.2 and the SBT90.

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Thanks Skylight
It was put on hold for other projects for too long waiting for a SBT90.2 that was never installed. DB Custom suggested that I leave it as is and build another light, he was correct and that is what I did. I really liked the XHP70.2 with more lumens than the SBT90.2 with more throw.