Author Topic: Defiant 3C MT-G2, 4 x 26650 custom build. Night shots added.  (Read 5976 times)

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Offline MRsDNF

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Defiant 3C MT-G2, 4 x 26650 custom build. Night shots added.
« on: August 13, 2013, 11:04:48 AM »
I can't remember how long this light has taken to build but it has been an on again, off again ordeal for some time for one reason or another. I'm a little disappointed with the output off the light with the effort that went into building it. Its running a 5 amp IOS 3 mode driver which works fine, just the led I feel could be driven a lot harder with the setup in this light. The light itself was sent to me by a member on this forum.
As usual I'll let the pictures do the talking so you don't have to listen to my waffle.
Firstly the copper pill where the led is soldered directly to the pill with the star sandwiched under it. The thread diameter is 30mm to give you an idea how big it is. This is the first time I have made a pill like this and I owe a lot off thanks to members who have done this previously on this forum for the idea. The pedestal for the led was machined on my lathe. I drilled a hole in the star and carefully filed out where the led normally sits.




The 5 amp driver has as someone has described it elsewhere been iced. The wires to the led are considerably larger than the standard wires.


The heat sink on the largest fin is 60mm in diameter. It has a forward switch which works very well.


The plastic switch holder is the reject one from the OL comp build light. The ends are recessed for the round contacts to sit into and not move around. They came from IOS. The spring is the heavy one also sold by IOS. I have used a few of these lately and feel so far that there is no need to add braid to them. With a spring either end of four 26650 batteries, they are held very firmly. The switch came from, Also from memory FF with the contact plate removed. These have a very firm spring in them and also used in the C3 XM-L2 build.


The tailcap was made from copper mainly for a good contact for the earth.


The battery tube is one piece this time. It took awhile to machine out as I only have a small boring bar which was right on its limits machining in from both ends. If the tube was five mm longer I would not of been able to machine it. Its standing next to a TR3T6 for a comparison size wise.


This is the heatsink with the pill and switch assembled into it. The screw at the back holds the switch assembly into place to stop it moving around. The rubber switch boot came from FT.


This was meant to be all the components in the build but due to some prescription medicines doing their thing some items were accidently left out.


The finished light. About time one sez. The second picture is the TR-3T6 with a C8 sitting on top of it.


And finally a group hug shot. Left to right. Back to front. 3C XM-L2, 3C MT-G2, Rebuilt HD2010 2 x 26650 (I cant believe the light output after rebuilding), standard HD2010, and last but not least a C8.


The light has had a 9 amp IOS driver installed today. To say this driver changed this light from a light to something that says look at me would be an understatement.


HD-2010 Standard.


HD-2010 5 Amp.


3C XM-L2 5 Amp.


3C MT-G2 9 Amps.
« Last Edit: August 16, 2013, 12:13:59 PM by MRsDNF »
When the big picture is to big, look for a point you can start at and build from there.

Offline Spasmod

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Re: Defiant 3C MT-G2, 4 x 26650 custom build. Night shots added.
« Reply #1 on: August 17, 2013, 03:27:24 PM »
Wow Steve that is impressive!
I know you said you didn't think it was as good as you were expecting but I absolutely love it!, that's one helluva lot of light and just look at the tint it's gorgeous :)

Oh and I just noticed you've put the 9 amps driver in.... good grief!! that's crazy LOL
« Last Edit: August 17, 2013, 03:28:24 PM by Spasmod »

Offline gords1001

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Re: Defiant 3C MT-G2, 4 x 26650 custom build. Night shots added.
« Reply #2 on: August 17, 2013, 11:49:34 PM »
thats awesome.   I really hope my lathe will cut metric threads then I can pkay too.

Offline MRsDNF

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Re: Defiant 3C MT-G2, 4 x 26650 custom build. Night shots added.
« Reply #3 on: August 18, 2013, 12:51:22 AM »
Thanks guys. gords. I hope so to gords. make sure you get as much info with it as you can. Normally they have a plate attached with what gears you need for what thread etc. In the end I'm sure mr gords will just make his own threads up like someone else does. Good luck. :D
Edit. The 9 amp driver may be coming out as I'm not happy with the way the high temperature protection works. This driver pumps out a lot of current to the MTG-2 and even with all the heatsinking I have it gets hot fast. I'm waiting for a response from Hank.
« Last Edit: August 18, 2013, 01:02:07 AM by MRsDNF »
When the big picture is to big, look for a point you can start at and build from there.

Offline MRsDNF

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Re: Defiant 3C MT-G2, 4 x 26650 custom build. Night shots added.
« Reply #4 on: August 18, 2013, 10:08:51 AM »
A quick update. After using the light last night for a short period outside I've come to the conclusion that the 9 amp driver in this light was not practical. When the high temp protection kicks in it is supposed to change down to low mode with flashing every now and then and then go back to high mode when a certain temp was reached. Instead it locks itself into whatever mode that it is in with an occasional kick down to low and straight back into high. On medium the light just locks itself into medium.
I have reinstalled the 5 amp driver today and after testing it took 33 minutes to overheat, the 9amp was 7.5 minutes in the same temp room, and the over temp on high did indeed work as advertised. Kicking down to low with flashing and going back into high when it had cooled to whatever temp it was programmed to. during this time the mode changes still worked.
With the 5 amp driver it took approximately, in still air, 35 minutes before the light was too hot to hang onto for any amount of time.
When the big picture is to big, look for a point you can start at and build from there.

Offline gords1001

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Re: Defiant 3C MT-G2, 4 x 26650 custom build. Night shots added.
« Reply #5 on: August 18, 2013, 11:07:51 PM »
I really believe that 5a is most practical in a light with an mt-g2 for that reason.  I'm not a fan of five minute lights at any output, yeah its impressive but pointless if you can't use them as a light

Offline MRsDNF

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Re: Defiant 3C MT-G2, 4 x 26650 custom build. Night shots added.
« Reply #6 on: August 19, 2013, 09:09:52 AM »
I dont believe what I just read. Have you tried the 9 amp driver from here.
When the big picture is to big, look for a point you can start at and build from there.

Offline gords1001

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Re: Defiant 3C MT-G2, 4 x 26650 custom build. Night shots added.
« Reply #7 on: August 19, 2013, 04:45:21 PM »
drthck? on the other forum has and it seemed to work I've not felt the need to put 9a through a clicky yet but that will change next month when I attack my fit 40s.  ::)