[PART 1] Official BLF GT Group Buy thread. Group buy officially closed! Lights shipping.

[WaylonJennings]

@wimmer2121

I’d like to echo what MAD said. What an awesome undertaking and collaboration by this team. I am amazed by what seems a monumental effort put forth by you guys. I’m happy I joined BLF and I’ll be very proud to own the GT. That said… it is for sale. lol just kidding

Same old Wimmer. I haven’t heard from you in a while. I was driving through Kentucky a few weeks ago and I almost looked you up.

[MRsDNF]

Thanks for the update on The Miller guys. :+1:

[WaylonJennings]

@Texas_Ace

@JasonWW

@WaylonJennings

Please add me to the list for a second GT. I think that I need a second GT with a XHP 70.2

Just so no one is confused, you’ll need to get that emitter yourself and install it.

All GT’s come with xhp35.

Correct, I am modding the prototype with an xhp70.2 but it is a mod at this point.

The normal XHP70 has good performance but a dark spot in the middle. I have an xhp70.2 coming that I hope will fix the dark spot but not sure what the beam will look like yet.

Let us know how it works out. I think the xhp70.2 would be a great light.

[sp5it]

That was probably already asked, but where can I buy mcpcb for XHP 70.2 that fit GT?
Mike

[NikolaS]

@Jerommel

@Bozlight29

I checked the facebookpage of Millers wife and she posted some photo’s of him celebrating Sinterklaas, a Dutch children’s feast which celebrates the name day of Saint Nicholas on 5 December. He looks ok, so I guess we will hear from him soon.

I just did the same.
And he just replied to my earlier email.
He had been ill, but he’ll be back here soon.

As for the payments, i’m waiting on funds, i will pay tomorrow.
So don’t take me off the list !!

Good news Jerommel, thanks for letting us know. Hope he feels better

[JasonWW]

@WaylonJennings

@JasonWW

@WaylonJennings

Please add me to the list for a second GT. I think that I need a second GT with a XHP 70.2

Just so no one is confused, you’ll need to get that emitter yourself and install it.

All GT’s come with xhp35.

I guess I could have been more clear about that. I have never attempted an emitter switch, but the GT sounds like it was designed to be easily modified.

Yes, you have to be clear because people jump to wrong conclusions very fast. They will be asking to buy it with the xhp70 option. Lol

Swapping the emitter out is easy, you just unsolder 2 wires and unscrew the mcpcb. Swap it, put the screws back in and then solder the 2 wires back on.

You’d need a 12v version of the xhp70.2 on a large diameter DTP copper mcpcb. Probably a Maxtoch.

Maybe a new centering ring will be needed or maybe the stock one can be enlarged?

Then to up the output from the driver from 2.5 amp to 5 amp you need to remove the driver and solder in a new resistor. That should be good for about 6,000 lumen.

I’m sure we will get more details from Texas_Ace soon. Maybe there will be a new thread for GT mods.

[JasonWW]

@sp5it

That was probably already asked, but where can I buy mcpcb for XHP 70.2 that fit GT?
Mike

The Maxtoch store on Aliexpress. I think this is the one. I’m guessing there is no difference in the star design for 6v and 12 volt and it’s all inside the led. Nope, this is the 6 volt version.

MAXTOCH Copper MCPCB Cree XHP70 MK-R2 MKR 32mm x 1.6mm Direct Thermal Path Copper Board

http://s.aliexpress.com/n22aYRJ3

[DB_Custom (Dale)]

It’s actually a difference in the MCPCB, the emitter is the same regardless. There is a separation in the way the electrical pads are on the MCPCB which allows a 2S2P for 12V. So if you want 12V, you have to have a 12V set-up MCPCB.

[JasonWW]

Mountain Electronics also carries it, but it says 6 volt.

Maxtoch XHP70 32mm Copper MCPCB

[JasonWW]

@DB Custom

It’s actually a difference in the MCPCB, the emitter is the same regardless. There is a separation in the way the electrical pads are on the MCPCB which allows a 2S2P for 12V. So if you want 12V, you have to have a 12V set-up MCPCB.

That’s what I was thinking, but wasn’t sure. Thanks.

So I think both of my links are the 6 volt version. Someone mentioned that the MaxToch store had the 12v version, but it was not advertised.

Below is the 12 volt version. Actually it can do both 12v or 6v.

Here’s the xhp70 bottom.

.

[Kindle]

Showed the review video to a family member who is now enamored and wants one, sooo…

Please add my name for a second light.

[Jerommel]

You could cut the traces and ‘jumper-wire’ the 2 halves in series.

[northbeard]

I’ve managed to make it onto the list at #1280. Signed up for batteries, too.

I can’t believe that so much interest has been generated in such a niche flashlight. I’m going to hazard the guess that the group over 1000 will probably be the last wave before any public distribution begins, if there is any. I’d like to hope that this much interest is enough to make the entire project worthwhile from Lumintop’s perspective. Or are the numbers still too small to make a difference in the grand scheme of things?

Hats off to the entire team for keeping this together!

[Jerommel]

@Jerommel

You could cut the traces and ‘jumper-wire’ the 2 halves in series.

Like this:

[Texas_Ace]

@Bozlight29

I checked the facebookpage of Millers wife and she posted some photo’s of him celebrating Sinterklaas, a Dutch children’s feast which celebrates the name day of Saint Nicholas on 5 December. He looks ok, so I guess we will hear from him soon.

Thanks for the update, that is good to hear.

[Jerommel]

@JasonWW

There you have the problem of giving the thermal pad half the voltage, because it is connected to the pads, and to the body of the light.
So it’s a bad recommendation, because you will short circuit half the LED and probably blow up the driver too.

[Texas_Ace]

@WaylonJennings

@Texas_Ace

@JasonWW

@WaylonJennings

Please add me to the list for a second GT. I think that I need a second GT with a XHP 70.2

Just so no one is confused, you’ll need to get that emitter yourself and install it.

All GT’s come with xhp35.

Correct, I am modding the prototype with an xhp70.2 but it is a mod at this point.

The normal XHP70 has good performance but a dark spot in the middle. I have an xhp70.2 coming that I hope will fix the dark spot but not sure what the beam will look like yet.

Let us know how it works out. I think the xhp70.2 would be a great light.

I just installed the xhp70.2 in the prototype, still have some testing to do but the results are promising so far.

Have not testing lumen output yet but should be around 6000+ with the new sense resistor and looks every bit of it.

A quick throw test showed it at ~1300m of throw.

At close ranges the xhp70.2 got rid of the donuts hole completely. At longer ranges while not a hole, it is still a bit darker in the middle of the hotspot. I will play with the focus tomorrow to see what kind of improvements can be made.

Tint is also pretty good for a latest gen Cree. It does have some tint shift around the hot spot but the hot spot itself looks great.

I will report on it more after I get the full test done.

[Texas_Ace]

@sp5it

That was probably already asked, but where can I buy mcpcb for XHP 70.2 that fit GT?
Mike

Lumintop has said if there is interest they would consider making a batch of XHP70 mcpcb’s to make this swap fairly easy. At this point you would need to either customize a normal mcpcb or have someone do it for you.

[Texas_Ace]

@Jerommel

@Jerommel

You could cut the traces and ‘jumper-wire’ the 2 halves in series.

Like this:

This is what the prototype mcpcb is, it uses an an SD75 mcpcb with the pads cut to convert it into a 12v mcpcb. You have to be careful when reflowing the LED but it works fine.

[JasonWW]

@Jerommel

@JasonWW

There you have the problem of giving the thermal pad half the voltage, because it is connected to the pads, and to the body of the light.
So it’s a bad recommendation, because you will short circuit half the LED and probably blow up the driver too.

That’s a picture from Cree I found.

Hopefully MaxToch will have a well designed 12 volt version.