Thrunite TN 42 ,a new record in Throw

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:

You are so right. Kind of empowering when I used it.

+1 to all you said ‘Wineslurper’… :+1:
Mine came in a few days ago and I am utterly amazed with it. :smiley:

Any comparison to K70?Is the TN42 way better than the K70?
You understand that I have the K70,and I think if it is sensible to give a TN42 as a Christmas gift to myself . :smiley:

I don’t know about the K70., BUT……… I do think it is mandatory that a TN42 be under your Christmas Tree ‘Theodore41’…… :smiley:
I do think you won’t regret it. :wink:

Merry Christmas teacher,thank you. :slight_smile:

Your welcome Theodore41…. MERRY CHRISTMAS to you also!!!

Have Yourself, a Merry Thrunite Christmas…. :smiley: