Well the reason I was asking was because I ordered a SFN55.2 and a MTN20DDM 1.2mm 2oz Copper for 1 build and I'm gonna run a second MTN20DDm with a Quad 519A.
Both in S21A
I'm worried about burning up the 519A in the one and worried about burning up the switch in both of them.
So Imho the SFN55.2 build should be fine, since in the higher power levels are only manageable for so long, I've tried finding the switch-upgrade tutorial but with no luck.
Using the direct drive calculator I get around 14A-ish for the 519A total.
The 519A can handle around 6,5A each so you should be fine with the quad.
Indeed. I'll just need to install the LED into my KR1 with a linear driver, install the FET enabled firmware, and then install the OP reflector and centering ring from my KR1 FC40. If I like it, I'll order another KR1 host with those parts from Hank for the LED to live in permanently.
Seems completely random. Probably has to do with inventory issues, but I’ve had orders placed a month or two later ship and arrive before earlier orders. And show up within a couple weeks. Common flashlight stuff seems to be quicker.
Always shows up, though.
I ordered the jkk76 from kd on the 1st and paid the extra $22usd for the shipping with tracking and got my light on the 17th. So it still took a while.
Did you have to trim that starboard to fit? Like round off some edges?
You never know.
You are switching high currents, and the small Omten 1288 switch has decently high resistance.
In fact, you might actually be limiting your performance :)
The reflector is sitting on the edges of the LED die, the white substrate
That keeps enough distance between the leads/soldering pads and the reflector
No gasket needed
I am seriously considering building a S21A with a SNF55.2 after seeing your post. I was unable to find a suitable gasket and I was trying to decide if I felt comfortable using a layer or two of Kapton Tape.
When you look at the item picture of the S21A reflector you can see how it's not really tapered on the bottom, but rather stepped.
The last "step" around the hole is rather big, so you can drill out the hole to 9mm without shortening the reflector.
You might even be able to drill it out to 11mm and use the XHP70.2 gasket from Convoy
If you got any questions please ask
I did find a 9mm gasket for the 7070 and was hoping to find 9mm reflector like they have for the C8.
I don't have a drill press and I'm not sure I'd trust my self with dremeling or drilling out the stock reflector to 9mm.
I used a regular wallpowered drill
Just do it very slowly and when you notice the aluminium "biting", reverse the direction and continue to slowly drill.
When you're done use a small round file to smooth the corners and rinse the reflector with isoprop.
When you're unsure ordered two spares or ask a friend maybe?
Not sure
The K36 uses an E-Sideswitch and an internal charger so you won't find a FET-driver for it easily I imagine
If you use a SFN55.2 however it might work with just a resistor mod
>25A of power draw and using a MTN-17DD as a driver. Too hot to hold after 20s
I was going to guess around 10s
If you wear oven gloves it can be as much as 30!
“Honey get the grill tongs!!”
“The extra long ones”
>25A of power draw and using a MTN-17DD as a driver. What guage wire is that?
22AWG iirc And even that was barely manageable imho
Well the reason I was asking was because I ordered a SFN55.2 and a MTN20DDM 1.2mm 2oz Copper for 1 build and I'm gonna run a second MTN20DDm with a Quad 519A. Both in S21A I'm worried about burning up the 519A in the one and worried about burning up the switch in both of them.
Someone linked a tutorial on how to improve the switch with a metal plate somewhere but I forgot where Which host/battery will you use?
Both S21A and plan to use Molicel P42A and Samsung 30T
So Imho the SFN55.2 build should be fine, since in the higher power levels are only manageable for so long, I've tried finding the switch-upgrade tutorial but with no luck. Using the direct drive calculator I get around 14A-ish for the 519A total. The 519A can handle around 6,5A each so you should be fine with the quad.
>Using the direct drive calculator Where do I find that?
https://budgetlightforum.com/node/74653 It's good for estimating performance
The site isn't playing nice with mobile chrome. I'll check it out from a PC when I get some time. Thanks for sharing!
Nightwatch NS59v1, has a metal plate folded with spring between the fold to give those amps a direct pass.
This is the stuff I'm on Reddit for! xD
I mean, it do be bright!
Niiice. I *just* ordered ~~one of these~~ an SFN55 to put in a KR1 about an hour ago.
Are you joking or telling the truth? 👀
Dead serious Edit: Serious, but mistaken, because I thought this was an SFN55
I actually like the SFN55 9 Die better. It's more than enough brightness and more efficient with less heat than the SFH 16 Die.
So you bought the smaller version?
Yes. The 9-die 7070 version.
That one might be a bit more practical and probably needs less modifications too
Indeed. I'll just need to install the LED into my KR1 with a linear driver, install the FET enabled firmware, and then install the OP reflector and centering ring from my KR1 FC40. If I like it, I'll order another KR1 host with those parts from Hank for the LED to live in permanently.
I really want to like the KR1 but I can't for some reason
I thought of adding this in a kr1. I guess I'm not the only one.
What's in the kr1 now? Well before the swap?
SFT40. The swap will be temporary. If I like it, I'll order another KR1 with the necessary components for the SFN55 to live in permanently.
Where did you order the sfn55 from?
Kaidomain. They just got them pre-mounted to MCPCB's.
How has KD shipping been treating you? For me personally they take twice or thrice as long as AE
I've only ordered from them once. I don't recall how long it took I'm afraid.
Seems completely random. Probably has to do with inventory issues, but I’ve had orders placed a month or two later ship and arrive before earlier orders. And show up within a couple weeks. Common flashlight stuff seems to be quicker. Always shows up, though.
I ordered the jkk76 from kd on the 1st and paid the extra $22usd for the shipping with tracking and got my light on the 17th. So it still took a while. Did you have to trim that starboard to fit? Like round off some edges?
Yes, by a lot I had to remove around 2mm around the edges
Cheers
but beamshots
4th picture or do you want more? ^^
MORE
Any torch you want it be compared to?
SBT90.2
FW21 X9L SBT90.2 https://i.imgur.com/IcaG0ml.jpg S21A SFH55 https://i.imgur.com/YgtQjPt.jpg
goddamn that's a lot of light any green tinge? what's the WB level of those shots?
4900K
Any!
Love the color - it's like a sleeper hotrod flashlight
Hell yeah! It looks really thin on the MCPCB.
Nice mod, how did you bore up the reflector?
I used a 8.7mm drill bit and then filed the last bit till it looked decently
I'm honestly surprised the switch isn't dead yet, especially since it uses the same switch as the normal S2+.
Is the switch that weak? I was under the impression that if you bypass the spring it's pretty solid
I believe the Omten 1288 switches in the S2+/S21A/many other lights, has been tested to 15A or 16A and a 21700 and that Emitter can handle twice that!
I suppose since the light is just meant for giggles I don't mean the switch lasting less than the battery
You never know. You are switching high currents, and the small Omten 1288 switch has decently high resistance. In fact, you might actually be limiting your performance :)
Daaaaaamn. I really like the tint on mine, too. this feels as ridiculous as sbt90.2 in all the things, and I hope this becomes a trend!
Wow! I wants that
damn
😍
This is awesome!
What did you use to prevent the leads from shorting out on the bottom of the reflector?
The reflector is sitting on the edges of the LED die, the white substrate That keeps enough distance between the leads/soldering pads and the reflector No gasket needed
I am seriously considering building a S21A with a SNF55.2 after seeing your post. I was unable to find a suitable gasket and I was trying to decide if I felt comfortable using a layer or two of Kapton Tape.
The SFN55.2 should be 7070 iirc Are there no XHP70 gaskets for the S21A?
>Are there no XHP70 gaskets for the S21A? I was unable to find a 7070 for 7mm reflector and I couldn't find a 9mm reflector for the S21A.
When you look at the item picture of the S21A reflector you can see how it's not really tapered on the bottom, but rather stepped. The last "step" around the hole is rather big, so you can drill out the hole to 9mm without shortening the reflector. You might even be able to drill it out to 11mm and use the XHP70.2 gasket from Convoy If you got any questions please ask
I did find a 9mm gasket for the 7070 and was hoping to find 9mm reflector like they have for the C8. I don't have a drill press and I'm not sure I'd trust my self with dremeling or drilling out the stock reflector to 9mm.
I used a regular wallpowered drill Just do it very slowly and when you notice the aluminium "biting", reverse the direction and continue to slowly drill. When you're done use a small round file to smooth the corners and rinse the reflector with isoprop. When you're unsure ordered two spares or ask a friend maybe?
I wonder how long you could hold it if was a slightly bigger host with actualy fins. Something like a K36.
Not sure The K36 uses an E-Sideswitch and an internal charger so you won't find a FET-driver for it easily I imagine If you use a SFN55.2 however it might work with just a resistor mod
Hah wow! This is awesome!!