The GT, Proto V2 arrived!, the BLF special giga thrower

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emarkd
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Yokiamy wrote:
XHP35 is 12V

Ah, gotcha. I thought they could be wired 6v or 12v like the rest of the XHP line but had forgotten that they’re different. Then the discussion happened about modding for 12v XHP70 and I lost track of what was being modded. My fault.

BrianK wrote:
emarked, taken from the very first post in the thread…

………….. Cell placement in carriers, 2 ot them, designed to have a functional light even when there are cells in only 1.

(I added the bold)

Gah, thanks. I shoulda thought to check the first post before asking. Great design, basically with a “filler” piece built in.

wimmer2121
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The Miller wrote:
welcome and your are on it Wink

Thank you sir! I’m excited about this one!!

and thanks to you, hahoo, for looking out for me Smile

BrianK
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emarkd, not everyone thinks of everything. BTDT myself.

I’d be curious to know what the throw on a modded GT would be like with the other LED and goosed amps. I remember reading somewhere here that basically the light output has to be hugely more to gain a bit of throw. At least that’s what I got from it. It would be nice for giggles, but I’m thinking not so efficient. (Since when did we care about efficiency though?) But Narsil would allow for less amperage to the LED to regain efficiency, correct?

The Miller
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it is my understanding that for a driver like this amps are kind of hard.
So besides 2.5A being the sweet spot for max output more amps at 12V reliable would mean different components, higher costs
It is interesting, for what I understood from TAs many post about series is that high amps are harder then higher voltage, would this be why so many single cell XPH35hi lights have made it to market at a relative low cost?

Texas_Ace
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Correct, buck drivers (and electrical components in general) have a much harder time dealing with amps then voltage.

Voltage can be scaled up with virtually no change in component tolerances or loses. The only real limit with voltage is keeping it from arcing or sparking. So the components needs to be rated for the voltage but it is a fairly simple task, you just add space between the traces or insulation to keep the voltage from arcing across and shorting something out.

Current on the other hand you can not escape, the only way to deal with more current is with larger, beefier, better components. This means more raw materials to make the components, more shipping costs ect.

The end result is that as current goes up, so does price, weight and size.

5A @ 12V is 60W of power, which is plenty for any LED on the market right now, sure an xhp70 might gain a little pushing it harder but not enough to really matter. People can get custom drivers for more extreme setups then that.

Know guns, know peace, know safety. No guns, no peace, no safety.

The ultimate result of shielding men from the effects of folly is to fill the world with fools. --Herbert Spencer , English Philosopher (1820-1903)

Texas Avenger Driver Series

My LED Test series - XP-L2 V5  - Nichia 219C 90+ CRILatticebright "XM-L"XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5  - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT - XHP70.2 P2 - XHP50.2 J4 - Samsung IH351D

Complete collection of all my LED test Charts

EasyB
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Regarding an XHP70.2 in this light: people are reporting ~180Kcd in the smooth L6 reflector. If the L6 reflector has an active diameter of ~66mm, then the 120mm diameter GT reflector has ~3.3x more area, leading to around 594Kcd. That is driven at a very high current though.

The Miller
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OK
TN42 on highest
28°C outside no wind
After 6m22s the part with switch and driver is hot
I still can touch it but not comfortable.

The tube gets warmer and the head too but slower then the tube

10m49s
Switch driver part is hot
Uncomfortable hot
Head lags behind
Battery tube hot but less then the hottest parts at 6.22

13m40s
I stop for the hottest parts are not nice to hold and I don’t want to heat it up too much
Ah what the heck ok after a minute cool down back to highest
Two minutes in, again driver and switch area not burning hot but too hot to comfortable touch
Placed it on a bench so no heat can escape via my hand

4m30s head is hot, tube is hot. Only driver/switch area feels burning hit but I can keep my hands on it without actually burning so it is between 50°C and 55°C

5m58s
Driver/switch area seems stable, head and tube still rising. (So we are ~20 minutes in on freshly charged Panasonic protected 3400 cells.

8m40s
The tube and head feel like when I stopped the first time.
After a couple of seconds I can’t hold the driver/switch area, it still rises in temp.

10m42s
Tube can be held without tendency to grip with one finger and switch fingers to give the heat no chance of giving a burning sensation.
Head, no more then 4 seconds in firm grip, gotta let go then, max 2 seconds for driver/switch parts

14m30s
Tube is getting too hot to firmly grip
No equilibrium
Almost half an hour in
Was I walking a little breeze would have cooled it, was it cooler or was there a little wind, that would have helped
Would I have held it, my hand could have taken away heat.

Turning off at 16m30s
Cells feel warm, lol tricky to unscrew the tube
Carrier is warmer

So half an hour in not ideal situation for cooling
Yes the GT should do better but we can up the default thermal stepdown for it for sure Wink

Five minutes later, all can be touched normally but is still warm to hot
Wow I am happy with the deep fins at the hottest parts of the GT!

EDIT voltage cells 3.81
walked with it on med for a few minutes too
starting voltage 4.19
pretty decent I think

Texas_Ace
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Now you understand why I was so keen on max cooling for the GT with it’s “low output”. There is no such thing as too much cooling. lol

Also around here the outside temps can easily be 90-95f at night (last night it was around 93 till midnight). So it would heat up even more.

Know guns, know peace, know safety. No guns, no peace, no safety.

The ultimate result of shielding men from the effects of folly is to fill the world with fools. --Herbert Spencer , English Philosopher (1820-1903)

Texas Avenger Driver Series

My LED Test series - XP-L2 V5  - Nichia 219C 90+ CRILatticebright "XM-L"XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5  - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT - XHP70.2 P2 - XHP50.2 J4 - Samsung IH351D

Complete collection of all my LED test Charts

nodoubt
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wimmer2121 wrote:
The Miller wrote:
welcome and your are on it Wink

Thank you sir! I’m excited about this one!!

and thanks to you, hahoo, for looking out for me Smile

that hahoo sounds like a nice guy Wink

eekazum
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nodoubt wrote:
wimmer2121 wrote:
The Miller wrote:
welcome and your are on it Wink

Thank you sir! I’m excited about this one!!

and thanks to you, hahoo, for looking out for me Smile

that hahoo sounds like a nice guy Wink

Yeah no doubt. I wonder who he is?

pirate joe 22
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in for 1

NikolaS
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Quote:
Yeah no doubt. I wonder who he is?

Must be Tom Hanks ! Cool

nodoubt
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NikolaS wrote:
Quote:
Yeah no doubt. I wonder who he is?

Must be Tom Hanks ! Cool


haha! would be nice…my bank account would have a few more zeros in it for sure Thumbs Up
wimmer2121
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nodoubt wrote:
that hahoo sounds like a nice guy Wink

Is that your name here buddy? Really appreciate you looking out for me like you did… you’re a true gentleman! That goes for everyone else who tried to help too. nobones, eek… y’all know who you are! Smile

Btw I did finally receive a few texts from saabluster this week. He didn’t offer any timetable for my Deft-X mega upgrade though…. we just talked about life and stuff. Facepalm

nodoubt
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wimmer2121 wrote:
nodoubt wrote:
that hahoo sounds like a nice guy Wink

Is that your name here buddy? Really appreciate you looking out for me like you did… you’re a true gentleman! That goes for everyone else who tried to help too. nobones, eek… y’all know who you are! Smile

Btw I did finally receive a few texts from saabluster this week. He didn’t offer any timetable for my Deft-X mega upgrade though…. we just talked about life and stuff. Facepalm

anytime my friend… Thumbs Up
this light should be epic, would of hated to see you miss out Wink

tino79
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If it’s possible I like to have one, too.

ISO
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Even if its not that useful I really want this flashlight. Its big, ugly, heavy and everyone will ask about it and thats perfect Big Smile .

BrianK
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ISO wrote:
Even if its not that useful I really want this flashlight. Its big, ugly, heavy and everone will ask about it and thats perfect Big Smile .

I don’t know about ugly, but I’m definitely chuckling!

It’ll look like a normal size light in the hands of a really massive person. Slung on me it’ll look like exactly what it is, a huge light. Yes, it will definitely get comments.

I’d like to see an extended Q8ish 8 cell light for massively extended runtime if it could be done. It would be the power outage light to beat! Of course it would need to be easily slung.

M3L8BQMjr2m
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Just registered for this, you can put me down for one GT too.

The Miller
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Welcome to BLF!
Will update list later Smile

Lyubo Yanev
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Please put me down for one more, 3 in total. Thank you.

JPLight
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Q8 and GT really seem to push up the number of Members here … Thumbs UpWink

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JPLight wrote:
Q8 and GT really seem to push up the number of Members here … Thumbs UpWink

Yeah, and my postcount too with all the welcomes Wink

Will34 had a really sweet idea for a GT marking, we are tweaking it now so it can be presented!

nodoubt
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any news on the reflector yet ?

The Miller
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And we have a first view on the reflector!




nodoubt
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[quote=The Miller]And we have a first view on the reflector!

wow, ask and ye shall receive Shocked !
looks shiney! Silly
i wanna see a pic of it beside of a grapefruit Big Smile

DavidEF
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It looks nice. But, why is the reflector pictured not the same as the drawing? Where are the extra ribs and such? Did they decide it was unnecessary?

Reason is not automatic. Those who deny it cannot be conquered by it. Do not count on them. Leave them alone.
-Ayn Rand

The Miller
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nodoubt][quote=The Miller wrote:
And we have a first view on the reflector!

wow, ask and ye shall receive Shocked !
looks shiney! Silly
i wanna see a pic of it beside of a grapefruit Big Smile


Yeah this was funny, yourquestion (not yet answered and ten receiving the email Wink

David, I thought it were like guide lines, those ribs, not for making them but to indicate the sizes.
But IDK,

Wieselflinkpro
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I would prefer a deper reflector, 140mm or similar. I think it should be at least as deep as its diameter.

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