Modding the Small Sun ZY-T20 - MT-Gangnam Style - Done - With Beam Shots

Where do I start? Just how much patience do you have? That heatsink itself, wow. The effort involved is incomprehendable to me. What an effort. I may have asked this before, how do you finish it of so its so round and even getting it so flat? Looks like you have found the answer to the shadowy ghosts as well. Good luck with the next stage. This is really amazing work.

I started out with the flat rectangles that were the result of splitting the pipe couplings and flattening them with a hammer and a block of wood. Then I traced out the circles, (2 on each rectangle). I cut them out with a pair of metal shears. First in squares, then cutting the corners and cutting again, till they are octagonal. Then I hammer them all flat again and coat one surface of each one with solder, by heating with a torch. Then I stack them up and use a pair of vise clamps to hold and squeeze, while heating them all together. That squeezes them tight when the solder melts. After cooling, I put the soldered mass into a vise and start smoothing off the octagon with files. Once I am fairly close, I use a dremel bit in my drill press and work it down till it fits. The final edge finish is with a dremel sanding drum in the drill press. It is not a perfect circle, no matter how hard I try, but it's close enough for horseshoes and hand grenades.

I’m stumped for words. A+ for effort and achievement. Thanks for sharing.

Cold! COLD???? It was 16 deg. F in Amarillo this morning.... 5" of snow on the ground and a 20 MPH wind out of the north!!! Our high today is to be 34..... first time above freezing in about 4 days!!! TYLER DOESN'T GET COLD!!! Get my room ready, I'm headed for your house!!

Great work OL.... AS USUAL!!! Your craftsmanship, thought and patience are beyond belief!!!

Dan.

forgive me but i didnt think there were gains to get out of an mtg2 after 4.5a?

Oh, there are certainly gains past 4,5A! Im running one in the 9-10A range.

Here is a chart made by djozz, taken from this thread.

thanks - i was looking for that specific chart but couldnt find it :slight_smile:

looks impressive!

Hmmmmm, looks like 12 amps would be even better. How many extra chips do I have lying around? Better charge up the 20R batts, so they are ready.Tongue Out

I would see how the setup works with 9A first and for how long you get 9A. There is really not much lumen gain after 9A, but you generate a lot of extra heat... And heat is something you already have enough of at 9A..

Nice bonus is with higher amps there is also higher voltage so less for the 7135s to burn off, if I’m reading the chart correctly? If the trade off is lumen heat or driver chip heat, well ….

More photos in the OP, I'm getting there slowly.

I dont believe you do not have a lathe hidden somewhere, even one driven by a horse on a treadmill. I’m telling you to go hide it now as I’m coming around later to bust this myth about you only using hand tools and a cheap drill press in your mods. Your workmanship and creativity which I hate to repeat myself is astonishing. I’m sending your TIR back along with some metal and stuff. I want to see what you create with it, not what I stumble myself through. :Sp

Steve, our Old Lumens IS A LATHE! Like you, I am always astonished at the craftsmanship. Makes us lathe guys work hard to keep up doesn't it!! Dan.

It's done, with beam shots.

Definitely looks like the brightest garage door shot I can recall. Amazing.

So bright it almost looks like you got snow going down that bank from the walkway!

Did/can you do a lux # on that beast?

I think it’s too bright to be able to do a 1 meter reading and I don’t have the set up for longer distances.

EDIT: Lux at 1 meter - 40600 it's a large hot spot and the meter is only seeing a tiny portion of it, but I suppose it still reads correctly. I would like to see what it reads at 10 meters, but that won't happen.

Very nice. Next time I will wear my welding shield before I look at the beam shots. :beer:

Just be glad he didn’t include a video of the driver doing the random strobe mode…

There is some intensity fade comparing your 2 throw pics pic, but it still lights up so much downrange it is incredible. If you had a lightbox that light just might try to melt the box and meter before even got a reading reading. Thanks!