Thanks for the nice comments, MRsDNF, MtnDon and MascaratumB. Sorry if I am replying late but here are the updates.
A few days ago I drilled out the holes of the seven leds reflector. I used a 10mm drill bit.
Before drilling
Half done with drilling
After drilling, I removed sharp edges and cleaned the reflector with air. It looks nice again and the holes are a little bigger now.
The switch retaining ring had to be drilled, too, to allow fitting a Convoy L6 switch cover. The self-made silicone covers did not work properly.
Switch retaining ring before drilling
After drilling and filing
Last Thursday five XHP70.2 leds arrived. I will use four of them in this flashlight. They are 5000K 90 CRI with N2 3C bin. I bought them at the HotRed Official Store on Aliexpress. XHP70.2 90CRI
Compared to a XHP70.2 P2 3A with 70 CRI (bottom right corner) it is clearly visible that these leds have the for high CRI leds typical orange phospor cover.
The four XHP70.2 look great in the reflector. The for now empty spaces will be fitted with three XHP70.2 P2 7A 70 CRI leds to achieve a rosy 4000K light.
That’s for sure. I added some new pictures below where you can see that I will actually use 7 XHP70 with a big copper spacer underneath.
I didn’t want to make an advertisement for the Deko brand :innocent: but it is a great drill. It is one of the few drills on Aliexpress that is brushless. It is said that brushless motors are more efficient, stronger and better than brushed motors. The Deko drill is indeed strong with 58Nm torque and it even has an impact mode for drilling walls. It has a 40Wh battery that seems to last forever, two speed settings and a very handy percentage display on the battery pack.
I am not an expert in drills but compared to the old drill with Ni-MH batteries that I used previously this is a whole new world. So far, I found no flaws with this Deko drill and I would recommend it. [end of advertisement ]
Thanks CNCman. I never did a mod with 7 XHP70 before but I hope to get it right.
True. Inside, the heart and the brain are missing, leds and driver.
50k lumens would be an optimistic but nice lumen value. :heart_eyes: If the FET can handle 70-80A I might reach that. However, my aim is more like around 30000 lumens which is already plenty. To handle the heat well I will solder the led MCPCBs to a copper plate and maybe add a little copper piece as heatsink on the FET.
Thanks pinkpanda3310. I chose a challenging mod on purpose because if it was not for the contest I would always postpone it. The contest gives me the right motivation to finish this mod within a certain time limit.
Thanks for the reminder, pinkpanda3310. :innocent: Just realised that time is running fast and I need to reserve a few afternoons for flashlight modding.
Here is a little update what I have so far:
- Host Dongdonghai D8A
- 7x reflector
- 7 XHP70.2 leds (3× 3000K, 4× 5000K 90CRI)
- 20mm copper rod
- 65mm, 55mm, 40mm copper discs for the spacer
- 30mm TA driver and side switch
- 8 18650 tube
Soldering paste, thermal paste, 16 or 18AWG cable, drill, metal saw, dremel and other material
So as of now I have everything to continue with the internal parts of the build. Some copper sawing, drilling and soldering is left to do.
What I am still waiting for is a 82x2mm AR coated glass lens (from the Haikelite MT07). It showed me to have arrived in my country so it should make it in time. It will replace the 80x3.8mm stock not coated glass lens.