MT35 Plus with SBT90.2 mod ( GT90 kit from Texas Ace )

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CNCman
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MT35 Plus with SBT90.2 mod ( GT90 kit from Texas Ace )

Hi all Smile
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.
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Here is the original being disassembled.








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The kit is in the lower area, 2 x battery carriers, driver + momentary switch, mbpcb sbt90.2, centering ring.

The momentary switch was too big so I trimmed it with a dremel tool carefully.

After trimming.

And the switch hole needed slotting as well.

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Ready to drill 3 mounting holes very carefully with a Dremel free handed.

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Here is a copper puck 38mm x 10mm that will get mounted on the driver side, opposite the led, for a heat sink.


Copper spacer acts as a heat sink for the driver with Arctic Silver between.


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Centering ring.







Battery carriers needed some modding. I could not get the center brass button to collapse, so I removed the compression washer and added another beryllium copper spring in the center of the silver plated spring.







The replacement metric flat head screw gives enough room for the center spring to fit.
The screw came from an old laptop I scavenged parts from.






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Finished and ready for testing.

The extension tube is slighty too long, so it needed a spacer.



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Both battery carriers checked about 4.2 volts.

Checking amps.


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The weather will be better tomorrow night for some beam shots.
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22 amps on turbo
1,829,513cd
5800 lumens
2700 meter throw
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Edited by: CNCman on 02/07/2021 - 07:10
Chatika vas Paus
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Very nice. I, too, have recently been thinking about doing this. Does your sbt90.2 centering washer fit this reflector? Because the hole in it seems too big.

Sunnysunsun
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Wow, impressive work as always. Out of curiosity, why didn’t you use the original switch and instead choose to go through the trouble of fitting the new switch?

Yokiamy
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Nice work!
Just out of curiosity; Why the Astrolux?
Wouldn’t it be easier to buy a first batch original GT ?

They’re probably just as expensive (got mine for 100€)

CNCman
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Chatika vas Paus wrote:
Very nice. I, too, have recently been thinking about doing this. Does your sbt90.2 centering washer fit this reflector? Because the hole in it seems too big.

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It fits because its home made. You can carefully modify the centering ring that comes with the kit. The mcpcb diameter and location of wires in relation to the diameter of the hole is a big problem. The reflector will make contact with wires on the mcpcb if not careful.
CNCman
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Yokiamy wrote:
Nice work!
Just out of curiosity; Why the Astrolux?
Wouldn’t it be easier to buy a first batch original GT ?

They’re probably just as expensive (got mine for 100€)


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$300.00 US Lumintop BLF GT XHP35 HI at Banggood.
$170.00 US Mateminco MT35 Plus at Banggood.
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No used ones for sale.
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Skylight
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Awesome work, CNCman. Crown Thumbs Up Looking forward to the beamshots. Cool

I have always wondered what the SBT90 would be like in the MF04. I have a MF04S and I’m planning to modify it with a dedomed XHP70.2. If the SBT90 was available in 4000K I would prefer it. It would be interesting to know if a direct driven, dedomed XHP70.2 P4 is much different from a SBT90.

CNCman
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Skylight wrote:
Awesome work, CNCman. Crown Thumbs Up Looking forward to the beamshots. Cool

I have always wondered what the SBT90 would be like in the MF04. I have a MF04S and I’m planning to modify it with a dedomed XHP70.2. If the SBT90 was available in 4000K I would prefer it. It would be interesting to know if a direct driven, dedomed XHP70.2 P4 is much different from a SBT90.


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Check out this for your answer Skylight Big Smile
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https://budgetlightforum.com/node/62600?page=2
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The dedomed Digi-Key XHP 70.2 5700K
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
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It is hard to beat the XHP 70.2 when driven hard. Wink
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. Wink
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I hope the rain and cold will let up soon to get some night shots Beer
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Skylight
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Thank you very much, CNCman. Perfect measurements! Cool Grad

I didn’t expect such a fast and complete answer to my question. Now I can put a dedomed XHP70.2 in my MF04S without thinking a SBT90 might throw much further.