Interesting, high price and sad it is a 3B instead of a 3D but interesting for sure. What is the obsession with the B and C tints? It seems to be way to hard to find the A and D tints.
Correct. I have the XHP-50 Armytek Viking Pro and you almost can’t see the donut hole. With proper focus, this should be easy to correct—much more now with the .2 versions of these powerhouses!!!
Got a XHP70.2 today - 5000K P2 3B. Has anyone else rcv'd one yet? Debating where to put it. I'd like to try it in the Convoy L6 I have the TA driver in with the SMI reflector, or would also like to try it the MT07, but don't have a custom driver in it, but do have it resistor modded.
A member sent it to me from overseas, along with a SinkPAD. I'll post some pics.
We don’t have a test of the 70.2 to know for sure but we can assume it is at least the same improvement as the 50.2. In which case we can figure it has a Vf of over 1V lower then the old 70.
Seeing as the old 70 could pull 12A a full 1V lower Vf could easily see these 70.2’s pulling upwards of 15-20A+ depending on the cells used. Even if that didn’t pop it you can bet it won’t be making peak lumens up there. I figure it should be around 10A for max lumens, so you want a fair amount of resistance to drop the power that much.
End point is that it running it in DD with low resistance is not a wise idea.
An inline resistor is not a bad shout. So quick maths: if your drawing 20A then assuming batteries are powering at 8.4v then total circuit resistance is ~0.42ohm. To get ~13A total resistance should be ~0.64ohms meaning you need to add a resistance value of ~0.22ohm.
The issue is that the resistor could need to dissipate as much as 5-10W. I don’t know of many that can do that and fit inside the flashlight body. The ones that do exist are expensive. Wire on the other hand is cheap and easy and can dissipate a fair amount of heat if it is silicone and long enough.
The best option is to use a regulated driver obviously. The stock L6 driver should be able to work as long as you don’t want more then 7-8A.
There is no black hole, well under 1 foot to a white wall there is, but nothing further away than 1 foot. It's got the usual new LED yellow around the hot spot. Could be the 3B tint, or just the nature of the LED's with our typical reflector designs.
The thing gets hot, maybe the hottest I ever felt after 30 secs. I didn't let it cool down much before getting the throw readings, and it was getting darn uncomfortable holding it for the 30-40 secs or so.
Is this thing usable? Well for a few moments, yes. I had two EVVA unprotected 4000K cells I tried. They were at 4.05V and I got about 11A on the clamp meter, and maybe about 6,800 lumens at start.
Surprisingly, ramping seemed to be working ok, but as has been pointed out, there's not many steps in the ramping table at the high levels, so it jumps bright fairly quick at the end.