Thrunite TN 42 ,a new record in Throw

I got over 700 kcd on the BOSS1 (forgot but maybe tops was ~740) with a dedomed XPL. Should hit 800+ kcd on the hot XP-G2 S4 2B, which I still have a couple of, but didn't try in the BOSS1. Tuning is the key, and I didn't get to locking the tuning down to the max throw setup. It's tricky to test over 10 meters for me as well, but you really need to go over 10 meters to get an accurate measurement on throw. My convention, and Dale's, is to measure at 5 meters - I can do this by myself, day or night in the basement.

For the outdoor tests I did at over 10 meters, think every light I measured had a higher reading.

The 4 big low resistance cells I used (EFEST 4200's) really help battle the Vf. Amps goes up with each added cell, in fact I blew a dedomed XM-L2 U4 1C in the BOSS1 from too much current, and the dedomed XPL seems to hold up to high amps better.

Of course the TN42 is a different power system of 2S2P, probably has a superior reflector to the BOSS1. I'd love to see a dedomed XPL/buck driver setup in that light - could probably get 800 kcd out of it, specially with a higher bin XPL of W2/W3 class. Of course the TN42 is an expensive piece to buy as a host, and don't think RMM's buck driver works well, if at all, with an e-switch.

The BOSS1 is typical budget quality all the way, just up-scaled in size. Wish they would start dumping them at a $40-$50 price, then I would definitely buy a couple.

How many Lumens had the Deft-X?

anyone pumped up the TN42 yet?

i ordered the NW one and hope that 2.5 - 2.7 A would work...

Yeah Tom RMM’s Mtn.Max 4S E-switch drivers work, the SD75 with the smooth reflector on the right, is running one with a 3amp choked down to 2.81+ XHP35 beats my K70 for throw.

Early driver TEST VICTIMS……popped a few 35HI’s and 35HD’s too!

Not sure I understand... There's no e-switch firmware option I could see: http://www.mtnelectronics.com MTN-MAX 26mm, and if you do set it up, what's the parasitic drain? I thought that was the big issue?

I asked, he made it? I got it in the SD75 and the T90-2 too…

XHP35 Gang….The L6 is running one of the smooth test reflectors I got from Simon now, Old pics from this summer, built a couple more since then…K70 sits in a BOX in the closet… :smiley: I have 2 TN42’s CW/NW sitting at home, see whats up with them, the other T90-2 Linear driver, I built is waiting on a show down! :+1:

I think it had 450 lumens.

I believe you - don't need pics of an invoice or lights. I'm curious because he doesn't advertise it, and I thought parasitic drain would be an issue - thought he mentioned something bout it before. Ok, guess Richard didn't mention anything about the parasitic drain to you and you didn't measure it. Oh well...

Ahh - found the post from Richard: https://budgetlightforum.com/t/-/32835/63

I think the parasitic drain is a problem with the zener mod. By using a linear voltage regulator it looks like that problem is solved. Like here:

thats a mean looking group you got there. very surprising that your sd75 outthrows a k70.
so the t90 throws the best of the bunch? have you done the showdown with your new tn42’s yet? curious to see how they stack up

This is well known - the LDO is for e-switches, the zener is for power switches. Zeners have significant drain, LDO's do not. We are talking bout the MTN-MAX buck driver, different animal - this is what he referred to, and buck drivers are a more complex design - some can have high parasitic drain, some are very low if they are designed for e-switch lights properly. You linked to a straight simple FET based driver.

Oh ok, I was not aware of the additional difficulties with buck drivers with respect to parasitic drain.

Got my TN42 NW today. The PWM (if it actually uses it) is totally a non issue, since it cannot be seen with the naked eye on moon. Have to check with the scope later.

And yes, I also got 700kcd. Measured with a cheap meter from 3.3m so will have to check again but still.

I have been using flat top Samsung 30Q’s in my TN42, they are a little loose so I ordered 4 LG MJ1 button tops for the 3500mAh capacity and 10A continuous delivery. I found some weird action in charging them up, they didn’t all charge initially and when I did tinker with them and get them charging they terminated early at around 4.17-4.18V. Never had issues with 4 new cells before.

Just tested the big light on the meter and it showed 700Kcd exactly. A little lower than the 30Q’s at 702.5Kcd. I’ll try to drain these MJ1’s a bit and do another charge run, see what they do.

I found the same issue with new 30Qs today in that the charge terminated early. So tried again, and same thing.

thrunite really pushed their own limits on this one.
after initial testing on sample one. vinh was only able to increase about 300 lumens and 79k lux.
his stock numbers were 2140 lumens , 703k lux
after mods, 2430 lumens, 782k lux.

his testing with other samples wont be for a while. he needs to wait for more tn42’s to arrive.
maybe he will try xpl or xpg2?

I have a K70 and I think if it is sensible to go for a TN42 selling the Acebeam.
What do you say about, after those months of having both the lights?

OK folks, after reading about the TN42 I ordered one and it arrived today. I just tried it out just now (it’s dark in northern Michigan) and all I can say what throw! Everything I read about it is true. Very nicely machined. I don’t have any pictures yet but it’s a keeper. Huge head and a great feeling in my hand. Apparently reading this forum proves I am vulnerable to the power of the light!

Congrats!

Can’t quit looking into that huge reflector, can you? :wink: :smiley: