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

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Texas_Ace
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I highly doubt we will be actually using TK75 carriers due to cost. I think they will be more along the lines of the Thorfire S1 carriers but with a second contact ring added around the outside edge. The current would then pass down through the metal connecting pins. The PCB in each carrier would be setup to connect in parallel. So if not all cells were installed or even no cells power would pass right through them as if nothing was wrong.

The other nice thing about doing it this way is that all 8 cells would not HAVE to match, while a good idea the most important thing would be for all the cells in each carrier to match. Since the carriers are setup in parallel it would be just like RC batteries when they are used in parallel.

Texas_Ace
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pilotdog68 wrote:
Even if the TK75 isn’t exactly how TA is envisioning, it’s possible to do our own thing. It’s is doable.

I actually never planned on actually using the TK75 carrier, it was just the only example I could come up with. The carriers have been planned to be custom made all along unless the manufacture just happened to have something that would work.

DB Custom
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FWIW, this is going to be tough.

I put a single R140 resistor on the bank of the TN42’s driver, it’s now doing 710Kcd on LG MJ1’s and 722.5Kcd on 30Q’s. With some 2500 lumens, it could probably stand a wee bit more…

The Miller
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Koenta wrote:
After following this topic for some time I also made the decision to buy one if the price is not getting to high. So please add me to the list.

And did someone already contact the software develepment guys for reflectors to get the best reflector? Maybe they are interested and like to work on this lovely project Glasses

Will update list later
Yes I contacted them via theri website and got a standard “thank you for showing interest in our software blabla please contact us at X@X.com” reply
So I send an email to the address asking the same, no reply yet

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Texas_Ace wrote:
The other nice thing about doing it this way is that all 8 cells would not HAVE to match, while a good idea the most important thing would be for all the cells in each carrier to match. Since the carriers are setup in parallel it would be just like RC batteries when they are used in parallel.

Aren’t the carriers going to be in-series in the tube though?

I am most likely too late or way off base to mention this, but what about a battery tube that can house 2 rows of 4 cells?
Line up 4 in series on one side in a battery slot, and if you want to run 8, line up 4 more down the other battery slot.

All of course housed within the battery tube still exactly how it looks from the outside, in the GT renderings.

Texas_Ace
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JockRobbins wrote:
Aren’t the carriers going to be in-series in the tube though?

I am most likely too late or way off base to mention this, but what about a battery tube that can house 2 rows of 4 cells?
Line up 4 in series on one side in a battery slot, and if you want to run 8, line up 4 more down the other battery slot.

All of course housed within the battery tube still exactly how it looks from the outside, in the GT renderings.

Just because the carrier are physically stacked on top of each other doesn’t mean they are electrically connected in series Wink

With the way I have it planned out each carrier will be it’s own 4S “battery” (which is what it technically is) and they will be electrically connected in parallel, giving you 4S2P. If you leave one empty, it will simply be 4s1p

Enderman
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JockRobbins wrote:

Aren’t the carriers going to be in-series in the tube though?

I am most likely too late or way off base to mention this, but what about a battery tube that can house 2 rows of 4 cells?
Line up 4 in series on one side in a battery slot, and if you want to run 8, line up 4 more down the other battery slot.

All of course housed within the battery tube still exactly how it looks from the outside, in the GT renderings.


The carries are “stacked” on behind the other but with two contacts on each end (or three if they end up putting a tail switch) the voltages will add up in parallel, see this post here: http://budgetlightforum.com/comment/1038664#comment-1038664

Each carrier is 4s1p, stacking carriers increases the p, not s Smile

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Texas_Ace wrote:
JockRobbins wrote:
Aren't the carriers going to be in-series in the tube though? I am most likely too late or way off base to mention this, but what about a battery tube that can house 2 rows of 4 cells? Line up 4 in series on one side in a battery slot, and if you want to run 8, line up 4 more down the other battery slot. All of course housed within the battery tube still exactly how it looks from the outside, in the GT renderings.
Just because the carrier are physically stacked on top of each other doesn't mean they are electrically connected in series Wink With the way I have it planned out each carrier will be it's own 4S "battery" (which is what it technically is) and they will be electrically connected in parallel, giving you 4S2P. If you leave one empty, it will simply be 4s1p

That is the way Fenix has been doing it, except 2S2P, with stacked carriers.

caramba
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I’m interested depending on the price.

mrheosuper
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4s li-ion, so, the driver will be in buck or boost config? or just a Fet direct drive one
if using 4s and xhp35, i prefer the DD driver, simple but high efficiency

Forgot my pen

Texas_Ace
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We are not sure what the driver will be at this point, something FET based though as a buck driver would raise the price a quite a bit.

Tom E
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For reference, the BOSS1 Reflector dimensions:

  O.D.      89.8 mm

  I.D.       85.0 mm

  Depth   58.0 mm

Overall I'd say the quality is very good - no noticeable rings or horizontal marks in the finish as you can see in some reflectors, 2 minor marks/imperfections, big flat surface on the bottom. it's a lot like an over sized HD2010 reflector. The flat bottom on the underside is about 33.5 mm - too big for any stock MCPCB to clear the wire connections, but lots of room to add flat copper extensions outward, so might just do that with using a 20 mm MCPCB, which the recessed cutout in the shelf is made for.

tmxod
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I’m in (depending on final price point).

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That makes sense. I wondered how that was going to work, cheers !!

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JockRobbins wrote:

Aren’t the carriers going to be in-series in the tube though?

I am most likely too late or way off base to mention this, but what about a battery tube that can house 2 rows of 4 cells?
Line up 4 in series on one side in a battery slot, and if you want to run 8, line up 4 more down the other battery slot.

All of course housed within the battery tube still exactly how it looks from the outside, in the GT renderings.

This is actually a clever idea, the carriers could either be keyed so they only go in one way or you could have the 2 carriers each be 2 cells long and half circles. Load one set of 4 batteries in or load 2 sets. It wouldn’t offset the balance as well, but it would simplify the installation of the cells as you wouldn’t have to keep track of which side of the carrier you insert them into.

Lazy-R-us

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Lazy-R-us wrote:
JockRobbins wrote:

Aren’t the carriers going to be in-series in the tube though?

I am most likely too late or way off base to mention this, but what about a battery tube that can house 2 rows of 4 cells?
Line up 4 in series on one side in a battery slot, and if you want to run 8, line up 4 more down the other battery slot.

All of course housed within the battery tube still exactly how it looks from the outside, in the GT renderings.

This is actually a clever idea, the carriers could either be keyed so they only go in one way or you could have the 2 carriers each be 2 cells long and half circles. Load one set of 4 batteries in or load 2 sets. It wouldn’t offset the balance as well, but it would simplify the installation of the cells as you wouldn’t have to keep track of which side of the carrier you insert them into.

Good idea, and put the switch direct in opposite position for good balance. Weight in the bottom in horizontal position and switch on top.

Enderman
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Koenta wrote:

Good idea, and put the switch direct in opposite position for good balance. Weight in the bottom in horizontal position and switch on top.

Either way you would still need to have custom battery holders made…. in which case you should just make them parallel anyway.
Being able to put all 4 at the back is why people want a double long tube in the first place, for balance.
JockRobbins
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Possibly wouldn’t even need carriers. Bore the battery tube with 2x ~26.5mm wide openings side-by-side. Have a rotating tailcap (Olight x7 style) so the springs stay in the correct place.

Not sure if I’m right but running 4 would be 4s1p,
running 8 you’d have 4s2p???

Koenta
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If you look at the weight of the head you are probably right. With the 3D CAD program it’s possible to calculate the weights of the pieces. The battery weight of one 18650 is between 44 and 48 gram.

Enderman
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JockRobbins wrote:
Possibly wouldn’t even need carriers. Bore the battery tube with 2x ~26.5mm wide openings side-by-side. Have a rotating tailcap (Olight x7 style) so the springs stay in the correct place.

Not sure if I’m right but running 4 would be 4s1p,
running 8 you’d have 4s2p???


That sounds overly complicated for a budget light…
The tube would also need to start as a solid chunk of aluminum rather than just an aluminum tube which is cheaper and easier to finish.
Also, added weight.
JockRobbins
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Enderman wrote:
JockRobbins wrote:
Possibly wouldn’t even need carriers. Bore the battery tube with 2x ~26.5mm wide openings side-by-side. Have a rotating tailcap (Olight x7 style) so the springs stay in the correct place.

Not sure if I’m right but running 4 would be 4s1p,
running 8 you’d have 4s2p???


That sounds overly complicated for a budget light…
The tube would also need to start as a solid chunk of aluminum rather than just an aluminum tube which is cheaper and easier to finish.
Also, added weight.

Dunno about complicated as such, but yeah I agree on the aluminium thing. It’d take a huge chunk to make each one – but think Courui D01 – they must have been chunks bored out. And their price point isn’t premium

KawiBoy1428
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Enderman wrote:
Koenta wrote:

Good idea, and put the switch direct in opposite position for good balance. Weight in the bottom in horizontal position and switch on top.

Either way you would still need to have custom battery holders made…. in which case you should just make them parallel anyway.
Being able to put all 4 at the back is why people want a double long tube in the first place, for balance.

Being able to put all 4 at the back is why people want a double long tube in the first place, for balance.

What people? Need to get the facts straight, this was never voted on or polled – but dictated to us BLF member’s.

Or am I wrong?

KB1428 “Live Life WOT

JockRobbins
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KawiBoy1428 wrote:

Being able to put all 4 at the back is why people want a double long tube in the first place, for balance.

What people? Need to get the facts straight, this was never voted on or polled – but dictated to us BLF member’s.

Or am I wrong?

100% right. I was almost going to say exactly what you said.

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JockRobbins wrote:
Xandre wrote:
I like flashlights to be as short as possible.

Short my SR 90,Led Lenser X 21.

In my opinion it looks better,but I shoot up my mouth,cause of the Smith & Wesson

Regards Xandre

I would not define either of them as “short”
And it seems to me you like this GT, but somehow you don’t.
If you dont like some aspects of it – no one is forcing you to buy it Cash

Sure,the big reflector is forcing me Beer

Regards Xandre

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Xandre wrote:
Sure,the big reflector is forcing me Beer

Regards Xandre

I hear ya it’s gonna be sweet Thumbs Up
And the fact it’s designed by peeps on here – that’s awesome

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“Make things as simple as possible, but not simpler.”

Also add me to the interest list

The Miller
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OP updated

Yes thatBoss1 has a nice beam profile and a scaled up reflector like that would fit the render of ar right?
Didn’t hear back from the reflector software peple, but o course t is holida season in the US so all things like that will probably be taken to next week.

teacher
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Please put me down as interested, cause I surely am. Thumbs Up

Wink

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The Miller
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will do later!

Xandre
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Here the boss with XHP 35 ca 400 Meter:

http://www.andis3d.de/4Forum/beams/BOSSAndi.jpg

but I want more.

Regards Xandre

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