Thrunite TN 42 ,a new record in Throw

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bibihang
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Stereodude wrote:
DB Custom wrote:
It might be very important to note the K70 uses 4 series cells and as such, a Buck driver. The TN42 uses 2P2S and as such, a Boost driver. So the type of cell can probably matter more to the boost circuit than the Buck circuit, in other words, it would probably benefit the TN42 more to use better cells, the K70 wouldn’t show any marked increase for the top or premium cell.
Boost or Buck is irrelevant if the output is constant current and the drive circuity is competently designed. As long as the inductor is sized to switch enough current without going into saturation after the battery voltage sags, you’re pretty much set.

IMO, none of these lights should use cells in series if they need unprotected cells. Unprotected cells and series use is a dangerous recipe without a proper battery monitoring system. Of course all of these lights all lack such a system.


A boost driver can be very well-designed and the efficiency can be optimized, but due to the nature of the circuitry the efficiency of a boost driver can never beat the efficiency of a buck driver, given everything else being constant except that for a buck driver has Vin > Vout.

Although running 4 batteries in series isn’t something that sound very safe, but it can sustain at the maximum output much longer and better than the TN42 (and let’s not talking about any programmed step-down feature). Correct me if I am wrong.

P.S. I am always a fans of buck driver with Vin > Vout, because instead of having a 400kcd output that can only sustain for 5 mins then quickly decrease over the time, I’d rather have that 400kcd light which can constantly sustain at this output until the batteries are almost depleted.

bibihang
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DB Custom wrote:
Led-Rise’s calculator is misleading. You cannot directly convert lumens to lux. Lumens is a measure of total output, lux is the measure of intensity in the center of the hot spot. A floody 1500 lumen light creates very little lux, whereas a pencil beam thrower making 1500 lumens puts virtually all it’s lumens down the middle, into the hot spot, for far greater Lux.

A simple converter just can’t show that.


I think the LedRise calculator is fine, because it takes the “Viewangle” into account, which determines how floody or focused your beam is. Smile

Thanks for the clarification and all the hard works and measurements that put into this Dale. Your works and other’s theoretical input have linked theory and field results together pretty well, and that’s feeling good.

Theodore41
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mjgsxr wrote:
Maiden666 wrote:
HI

I,ve done a (non profesional) review- comparative k70-TN42. Its in spanish Flashlight Forum ForoLinternas. (In spanish).

K70-TN42

Hi Maiden666, great looking review with plenty of pics. Sorry I can’t read spanish.
I would say you review looks very profesional. Do you feel the TN42 has made much of a step forward over the K70?


I used Google url translator,and it is 100% OK.Try it.
blueb8llz
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I wish someone out there would mod this with a dedomed xpl,xpg2, or xml2.
A year ago, we would be so stoked to have a reflecter of this caliber with a xml2 or xplHI.
And we would either dedome it or drop in a dedomed xpg2.
These were the known emitters for massive throw.
I feel the xhp35hi is geared for lots of throw with great lumens.
A super amped up xpl or xml2 wouldn’t be that much less lumens, but I suppose the lux would be a lot more don’t you guys think?

giorgoskok
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blueb8llz wrote:
I wish someone out there would mod this with a dedomed xpl,xpg2, or xml2. A year ago, we would be so stoked to have a reflecter of this caliber with a xml2 or xplHI. And we would either dedome it or drop in a dedomed xpg2. These were the known emitters for massive throw. I feel the xhp35hi is geared for lots of throw with great lumens. A super amped up xpl or xml2 wouldn’t be that much less lumens, but I suppose the lux would be a lot more don’t you guys think?

My vote would be dedomed xpl . Better throw and only a small (400?) lumen loss.
Because it has better throw than xpl hi . Ofcourse xp-g2 would throw better , but it will have around 1k lumens only .

mdeni
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blueb8llz wrote:
I wish someone out there would mod this with a dedomed xpl,xpg2, or xml2.
A year ago, we would be so stoked to have a reflecter of this caliber with a xml2 or xplHI.
And we would either dedome it or drop in a dedomed xpg2.
These were the known emitters for massive throw.
I feel the xhp35hi is geared for lots of throw with great lumens.
A super amped up xpl or xml2 wouldn’t be that much less lumens, but I suppose the lux would be a lot more don’t you guys think?

Spotlights have this kind of reflectors all the time. But are regarded as dumb. But TN put a slightly bigger reflector and all run like hell. And charge 200$. Next year they will bring 10mm larger reflector and same story. Meanwhile years before spotlights are offering the same for 30$, but in a plastic body. I dont think the body costs 170$ pardon me.
Theodore41
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mdeni wrote:
blueb8llz wrote:
I wish someone out there would mod this with a dedomed xpl,xpg2, or xml2.
A year ago, we would be so stoked to have a reflecter of this caliber with a xml2 or xplHI.
And we would either dedome it or drop in a dedomed xpg2.
These were the known emitters for massive throw.
I feel the xhp35hi is geared for lots of throw with great lumens.
A super amped up xpl or xml2 wouldn’t be that much less lumens, but I suppose the lux would be a lot more don’t you guys think?

Spotlights have this kind of reflectors all the time. But are regarded as dumb. But TN put a slightly bigger reflector and all run like hell. And charge 200$. Next year they will bring 10mm larger reflector and same story. Meanwhile years before spotlights are offering the same for 30$, but in a plastic body. I dont think the body costs 170$ pardon me.

700000cd with incadescent? Shocked
Stereodude
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bibihang wrote:
A boost driver can be very well-designed and the efficiency can be optimized, but due to the nature of the circuitry the efficiency of a boost driver can never beat the efficiency of a buck driver, given everything else being constant except that for a buck driver has Vin > Vout.

Although running 4 batteries in series isn’t something that sound very safe, but it can sustain at the maximum output much longer and better than the TN42 (and let’s not talking about any programmed step-down feature). Correct me if I am wrong.

Boost and buck are both capable of similar efficiencies. Both can get well over 90%. A buck/boost circuit is less efficient.
DB Custom
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I charged up my “20 Million Candlepower” 12 inch wide spotlight that uses an automotive headlight bulb. Was going to take it with me for comparison beamshots on the mile long throw shots. Got it charged up, took it outside, it’s so pathetic I left it at home. I even have a high grade upgrade bulb in it. The Thrunite TN42 slaughters it.

The big spotlight was like $40, all plastic, bare bones with no heat sinking. Big 12V sealed acid battery. It’s not designed with any sort of quality in mind, just stick a car headlight in a plastic housing and give it a base that allows it to be propped up at an angle, gearheads’ll buy it at the Auto shop because they work on their cars at night and/or go fishing. Wink

The cost, yeah, I have to agree I think the cost is high. AceBeam, Thrunite, Nitecore, Fenix, they all have the same type pricing. I don’t like it myself, have few of their lights. This one though, this one was introductory with a 20% discount and promised that mile… I couldn’t help it. The only mile long thrower I ever built was based on an Olight SR-90 Intimidator, a $400 light before I even started modding. At $179, it seemed like such a deal… and compared to what’s out there on the market, it is!

One thing I found was tripping me up on the ideas of distance and light is that in photography we are trying to maintain brightness for the proper exposure. With flashlights we are allowing brightness to fall to a 1/4 lux. Massive difference and one I was not taking into consideration. In photography, we’re also trying to maintain a shutter speed that allows for some movement, so the light has to be considerably brighter to provide the shot.

Memory loss sucks, I do not recommend it.

mdeni
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Theodore41 wrote:
mdeni wrote:
blueb8llz wrote:
I wish someone out there would mod this with a dedomed xpl,xpg2, or xml2.
A year ago, we would be so stoked to have a reflecter of this caliber with a xml2 or xplHI.
And we would either dedome it or drop in a dedomed xpg2.
These were the known emitters for massive throw.
I feel the xhp35hi is geared for lots of throw with great lumens.
A super amped up xpl or xml2 wouldn’t be that much less lumens, but I suppose the lux would be a lot more don’t you guys think?

Spotlights have this kind of reflectors all the time. But are regarded as dumb. But TN put a slightly bigger reflector and all run like hell. And charge 200$. Next year they will bring 10mm larger reflector and same story. Meanwhile years before spotlights are offering the same for 30$, but in a plastic body. I dont think the body costs 170$ pardon me.

700000cd with incadescent? Shocked

Incadescent or HID does not matter, lumen output does. I don’t think you have seen what 100W incadescent philips in a 20cm reflector can do. Don’t even venture into HID land, where 200W HIDs live for 100$+battery. Those millions of candles are EASILY attainable. And the “top” led thrower has 700k and people are talking like god is walking among us.

The point is, they want to milk money. All they do is put few mm bigger reflector and claim the “top” performer. Look at the Courui01 mods with 82mm reflector. Think of what an xpg3 sliced 150mm wide and 150mm deep reflector can do to this poor TN. Smile

DB Custom
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Not as much as all that, I haven’t seen a sliced G3 do so well.

What it boils down to though is the bird in the hand thing. I HAVE this mile thrower TN42. I don’t have anything nor have I in 3 years seen anything that will best it.

Edit: I’ll also add that while HID’s are capable of impressive results, the only ones I’ve seen had horrible tint and took forever to warm up to peak output. Not practical, they have a place for sure but it’s not something an average user would put up with.

mdeni
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I know. I would get the TN42 this instant. But the price is a bit steep for my taste. Smile

DB Custom
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Interesting, isn’t it? How can Simon sell the wonderfully made L6 for such a low price while other manufacturers sell at 3 times the price and don’t really do much of anything all that much better? Ok, so they have a fancier proprietary driver, but it that alone worth well over $100? I wouldn’t think so! Having been working at learning the machining on my own lathe, turning the aluminum and anodizing it is a pretty basic part of the equation, for the most part the better lights are all the same in that regard and one shouldn’t cost more than the other. Same thing with the AR glass, Chris has the ultimate AR coatings at flashlightlens.com and his lenses aren’t ridiculously priced, so again the market should be fairly equal. With a decent reflector common to most all of em, it really boils down to the driver, and I’m building my own drivers for a while now with the most complex of them not being over $20 or so to produce, this a big custom designed driver for high output at that. So, is it the warranty? The overhead of a bigger fancier face online? Or just more greed?

I know some people will buy a like/same product for more money because they’re trained to perceive the costlier product as having a higher quality by default. Perhaps that’s the target audience for some of the big names, just mark it up to appeal to those with fatter wallets and run with it. Could be that’s all there is to it.

We could have Richard and ToyKeeper design a driver for Simon, he could build a 120mm boss hog light, and he’d probably sell it for $100 or something, now wouldn’t that go over well? Reckon he could build a de-domed XP-G2 1Mcd thrower with that kind of help? Wink Maybe we should get JDub to push in that direction, see where it goes…

mdeni
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Excellent, and realistic idea.

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Well, Richard already makes a Buck driver that will run the XP-G2 at 5.5A, I have one in an L6 making 439Kcd. So if it just takes a bigger head/reflector set-up, I can see upgrading the L6 to an L10 and using 32650’s for run time. The TrustFire 32650 is awesome, and at 6000mAh it’s the highest performing highest capacity cell I know of. I’m using 6 of em in 2 TR-J20’s, they’re unbeatable by any other cell I’ve got (I’ve got a lot of options).

Perspective wise, a 3*32650 Buck driver light with a 120mm head should be flippin awesome! Then again, Thrunite could build it too as far as that goes, maybe they’re already working for something along those lines…

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I don’t think i’m the only one that wants a 400kcd + affordable flashlight . It could be a 700kcd light ….

Maybe Simon is the key as you said Dale . A light with xhp35 , 4S battery holder and the appropriate driver ? I don’t think a cheaper TN42 isn’t possible . But only some people here can make it really happen .

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You really don’t even need a XHP35 or a 4S battery holder, just a host that can hold a reflector big enough to produce that amount of throw with fet driver and a single cell. Reflector size is the most important factor.

giorgoskok
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I was thinking of something with 2k+ lumens , and a stock led . That’s why i was thinking of xhp35…

djburkes
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giorgoskok wrote:
I was thinking of something with 2k+ lumens , and a stock led . That’s why i was thinking of xhp35…

Yeah, I wasn’t thinking about that. It would be nice…$200 is too expensive for a light. I use to not mind paying that price to get a good thrower or flooder but not anymore.

EasyB
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djburkes wrote:
You really don’t even need a XHP35 or a 4S battery holder, just a host that can hold a reflector big enough to produce that amount of throw with fet driver and a single cell. Reflector size is the most important factor.

I agree.

An XPL HI would perform great in a large reflector light. Of course we know that; people here make big XPL HI throwers all the time. The XHP35 does have advantages over the XPL HI: similar luminance but with potentially 50% more lumens. This manifests itself as a hotspot with similar intensity but with a 25% bigger diameter (XHP35 active area is ~2.50mm while the XPL HI is 2.0mm). This is nice but not a huge increase. And it comes with the complication of being 12V. It’s fine that manufacturers use the XHP35 to get that 50% boost in lumens, but we modders can get a pretty similar result with the XPL HI much easier just using a FET driver. Though of course I wouldn’t blame modders for wanting the XHP35; it’s all about optimizing the performance.

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Yeah, it would be nice if there was a single cell driver for it that would push it further than 1.5a.

giorgoskok
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djburkes wrote:
Yeah, it would be nice if there was a single cell driver for it that would push it further than 1.5a.

But you would loose runtime and/or runtime on max setting .

EasyB
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giorgoskok wrote:
djburkes wrote:
Yeah, it would be nice if there was a single cell driver for it that would push it further than 1.5a.

But you would loose runtime and/or runtime on max setting .


Well, isn’t it always a compromise between brightness and runtime?
djburkes
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Yeah, there wouldn’t be much runtime on one cell…just dreaming I guess, lol.

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djburkes wrote:
Yeah, there wouldn’t be much runtime on one cell…just dreaming I guess, lol.

Dreaming isn’t a bad thing Beer

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Has been on holiday for last week, and today got my TN42 from my work place.
Below are some numbers for ref.:
Flashlight – Ceiling Bound – Lux @ 7.5m (kcd) – Total weight with batteries
TN42 (NW) – 286 – 9440 (531) – 852.7 g
K70 stock – 328 lux – 7580 (426) – 772.9 g
K70 (NW) – 323 lux – 7440 (419) – 773 g
TK61 Mod – 189 lux – 7170 (403) – 790.6 g
BOSS1 Mod – 196 lux – 7130 (401) – 1492.1 g
Maxtoch 2X – 199 lux – 4530 (255) – 412.8 g
TM36 Lite – 161 lux – 3410 (192) – 1066.9 g

(Remarks: The TM36 Lite is under performing using protected batteries in parallel. The intensity test may not be as accurate as the distance is too short)

Here they come Smile
Below are the beam shots at about 110m distance, taken using Canon EOS 70D with 15-85 IS USM using tripod:






Next exposure time:






Next:






CWK

will34
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Great shots, thanks for the test!

Poor neighbors, did they called the police or anything? Silly

wkhchin81
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I am not sure, that’s 3:00 am. During the shooting, there were some lights being switch on and off. The area I shined at is the corridor, but the beam coronas spilled over to their kitchens (left units) and bed rooms (right units) Sick

CWK

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Awesome pics wkhchin81, I am surprised that the Boss 1 was able to keep up and has a smaller corona. what kind of mod did you do on it?

wkhchin81
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BLF A6 DD driver with XPL-HI V3 1C from Kaidomain, the copper based plate is from Noctigon 20mm XP, with bypassed spring and a copper ring attached to the original driver for anode. It measured at 1400 lm when the batteries are fully charged. During this test it was about 1300lm. I learned from TOM E Thumbs Up

CWK

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