A previous version of this optic/board combination from KD (I have one) had a thinner 1mm thick MCPCB which was also not good: the holes were either too wide or the optic needed a bit sanded off the legs. I never bothered to find out what exactly was wrong because I never used it, but it clearly did not work off the shelf, something had to be fixed.
I fully agree with you 1stein. BanL, can you please try to source some Osram Ostar Projection Compact LE R Q8WP LEDs? These are very powerful red light LEDs.
Just to be sure you know that is 1st gen 70 right? not 70.2
I know
Thats unfortunate, they used to have the same tint and bin xhp70.2
How’s performance?
I didn’t like it compared to the Carclo … it had a more visibly defined hot spot that had half ring artifacts around the spill… the Carclo has a smoother flood beam (depending on what type of LED used like dome vs de-domed) none to very little defined hot spot, better smoother flood spill the farther out the beam is shown, specially in the bigger heads like the X5, Convoy M1 and Surefire 6P… the Carclo in the FW3A was a smooth flood but gave a square beam profile, because the head is so small…and I had to turn the optic down so much to fit it…Carclo Quads don’t work real well in the FW3 size head…but the flood is smoother…
just my 2cent…
Thanks. 
Does anyone know if the MCPCB it comes with works with both 6V and 12V? I want to use it in the Thrunite T1 which is confirmed to be 12V. There’s no option to choose 6V or 12V on the order page.
Black MCPCB for xhp50/70 is only available in the 6V configuration
Edit.
T1 has a xhp50, which is smaller. How do you intend to use the xhp70 in this flashlight?
Pretty sure it is a standard MCPCB (2S2P, 6V). You need a Sinkpad XHP70 12V/6V MCPCB (upgrade shipping in LEDDNA I advice).
The reflector hole in the T1 fits the XHP70. I prefer buying it presoldered. Will just wait for other emitters to use in this host.
Has anyone used this driver? How bad is the PWM?
CF 17mm 0.9V - 3.3V 4 Groups 2 to 5-Mode Boost Driver Circuit Board
I am looking to rebuild a very old 1xAA light and want to add the ability to use a single 14500 as well.
The other concern is that it is only rated for 3V which would limit use to an AA or 3V lithium primary, not sure it would take a 14500.
I have the CF 17 in a mini-mag mod and it has been working well thus far.
It definitely uses PWM on Low and Med that I can detect if I vigorously swing the light back and forth but it’s not noticeable (to me) in normal use.
On 1x14500 it continues to have all 3-modes (each brighter than when using 2xAA) but I normally run 2xNiMH so I can’t say about longterm. On the plus side it’ll even run on 1xAA!
“Has anyone used this driver? How bad is the PWM?”
I have used that driver. I am pretty happy with it. The mode spacing is not ideal in my opinion. Low is about where I would like medium to be. You also have to wait a painfully long time before turning the light back on in order to avoid advancing to the next mode. The PWM is audible to me but I have pretty good ears so I’m not sure how noticeable it would be to most people. It is pretty noisy to me though. I don’t “see” it though. I have run it a fair bit on an 18350 and single Cr123s and had no issues thus far. I did not run it long on a single AA but I did some when outside of a host for testing the modes. It seemed to run great on it. For the price I am happy with it and don’t mind living with its quirks.
Edit: Sorry I don’t know how to do the usual in-text quotation.
pc_light and Superstocker, thanks for the reply! I am targeting using it with a single AA. Sounds like it might be a decent option.
KD, I see that you’re offering dedomed XHP50.2 emitters…but just a single tint.
I would be interested in a dedomed variant of
XHP50.2 6V/12V 3000K CRI80 J2.
Would that be possible?
I have a few of this varrant and I have never noticed the pwm. But I dont think there the exact driver in your link.
This should be using the PAM2803 boost ic. If the battery voltage is over the vf of the led it runs direct drive with the current running through the inductor, FB resistor and diode. They are all in series tied to a Fet which is tied to the led. The mcu controls the Fet for modes. All these components in the leds path has some resistance not just the FB resisitor. So it is limited in current in direct drive. I have never had one stop working with both battery types but if you wanted to add a little more assurance you could change the FB resistor to a little higher value. Pic looks like a R120, for insurance you could change it to R150 or more.