I have seen Vf go up a large amount after a seemingly perfect dedome. Maybe do an emitter swap to a domed xp-g2 to see if the amps jump?
I’m probably going to take the easy way out, and wait for my new benchtop power supply to show up tomorrow and check the Vf of the LED while it’s still soldered to the pill then compare that to an untouched one. I hate desoldering and resoldering MCPCB’s without good reason, it makes a mess of the nice paint job.
My Korad KA3005D, the cheap, faithful, power supply that could, died on me thanks to a brain fart. I’ve gotten used to some of its features and in the process of looking for a replacement capable of higher currents by better known brands I found that they were missing on most 10A models. I came a full 360° and ended up with another Korad. It’s a KA3010D. My first one showed up and was smoking like a Jamaican Rasta Convention in seconds. I went through an extremely painless return process, and the company has tested the model they’re sending me as a replacement. As long as this one doesn’t burn up in seconds, I expect it to be a nice upgrade to the bench.
More data tomorrow…
Edit: I was looking at the wrong tracking info, my power supply is due Thursday not tomorrow. Phooey.
Even better!
Kloepper Knife Works,
Any chance that you have AMC7138 stacking problems?
I used to, but lately my technique has gotten much better. This board had 3 stacked on the lead side by RMM when I bought it, three on the spring side by me yesterday. It seems unlikely that the 3 I did damaged anything else, and if you exclude them, with 11 it should still make 4A. I’ll take a picture in a bit.
Ok. Maybe that or maybe something shorted like tiny blob of solder. I alway have correct tail measurements that corresponds to number of amc7135/8 chips. My method of tail measurements is undisputed clamp meter, and it is crazy accurate.
Some pictures of my stack job. Be kind, I’m not uber great at soldering, but I’m getting better.
362kcd on only 3.3A sounds like a lot 
Hopefully it should get a lot higher if we can get the XP-G2 S3 up to over 5-6A
Is the 362kcd measurement with the stock switch, or from when you tested the Amp without the switch?
Test direct driving it without the driver, that was i plan to do for max throw, for a hot & short run time 
I suspect your brass post (or is that an aluminum post on a short spring?) is limiting your amp slightly, those who have tested & posted results here with both a brass post & a wire bypassed spring, have so far shown the wire bypassed spring to get an higher amp.
At least on a DD or FET driver set up, i am not sure how it effects a linear driver.
What battery do you use & what size gauge on the wires?
362kcd is with the switch in place on the light.
That’s solder on the spring, there’s a wire hiding under it.
Efest purple 26650 battery, stock wires on driver (probably 22ga).
Ok, thats solder yeah thats how i make them also, a big dab of solder on top of the wire bypass on the spring sanded flat But yours where so tidy & round i didn’t recognize it for what it was.
The Efest purple 26650 battery should easily supply what ever the driver is letting through, the only “hotter” battery i know of is the green Efest 26650, but that is only 0.3A more capable.
cajampa
There are Purple 4200ma now- quite new ones, which are on thier way to me: i believe they would be better
Its true: for some wierd reason 4200 Green ones are better at 4-5-6 amps on both LD1 and A17DD drivers- i tested them alot
Maybe for high amps 3500 Purple ones would be a better option(havent tested it realy), but we dont see that often 10+ amps from a single battery in flashlights
Anyone able to post some beam shots of their setups yet?
Really keen to see what the de-domed XP-G2 will look like, as I need to order an emitter for my host.
If anyone could post a side by side shot next to maybe a stock Zeusray that would be handy. My worry going XP-G2 is the beam will just be too darn narrow.
I have a domed XP-G2 in an Aleto 26605 (giant SK68 look alike) @ 3 amps. But I find it quite useless for distance as the beam is so tiny. My de-domed XM-L2 Zeusray easily throws as well, but with a far more useful beam.
So I’d kind of like to know what the XP-G2 de-domed is like in the 1504, as I might go XP-L de-domed instead.
High lux is great, but not if it’s actually useless. I can always use a laser pointer for that kind of work.
I’d recommend you go with the XP-L based on what I’m seeing right now. If the Vf is going to be the limiting factor with the XP-G2’s then the extra 60kcd won’t make that big of a difference in ultimate throw distance.
Not the final word though, I’ll know more tomorrow.
Interesting i did not know Efest had a purple IMR4200.
I checked out there web side, and the purple IMR4200 is only a 40A, so i would guess that the 50A green one would still be stronger at under 7A.
And yes you are right at higher amp over 6A the 64A purple Efest looks to be the stronger battery.
It is really unfortunate that HKJ haven’t done a test on the green one yet.
When i checked Efest webside i saw this a IMR 35A 2800mAh 18650 purple thats looks interesting, a very unusual capacity at 2800mha i really wonder what it is based on.
And i hope HKJ soon test it because if it really are as strong as the old 2500mha purple 35A the added capacity should make it easily one of the strongest battery on the market. But we know they fudge the amp rating a bit so i wait for HKJ’s test on it, Efest is usually good at sending battery’s to him.
Guys i don’t know if you saw that in RMM’s thread he announced that he had ordered a reel of XM-L2 U4 1C’s, those could also be a candidate for the bigger die max throw.
They are reasonably CW & should be very efficient, i can’t wait to see what they can do
They XP-L V6 1A that LEDDNA sells are suspected to only be V5’s, and if they are the XM-L2 U4 should be 2 flux bins over that
Personally, I ordered a 1405 to use with one of RMM’s new buck drivers. I was planning on going with an XP-L, but I may still opt for an XP-G2. We’ll see.
Well I put together a dedomed XP-L V6 3C and a BLF17DD driver. I’m getting 4.5 amps at the tail and about 225kcd.I think the high Vf of these new emitters is going to be the bane of single cell lights.
KKW, I was pulling either 5.6 or 5.8 at the tail (no switch) with the dog dedomed XP-L V6 3C with 17DD-S08 driver and a 25R so something else has to be going on with your light.
I have yet to personally see 5amps+ on a single XP-L, you maybe have just gotten a great one.
You may be right, just reporting my results. I did scrape the wire on the diode to the right of the die, there are reports that this may raise the Vf. In preparation for this I tested it before the dedome. 4.5 amps at the tail (no switch).
Maybe I’m just unlucky and the fact that I’m not cherry picking LED’s is making a difference too.