As far as longer springs goes...I have some, but they are also very wide at the base. If you need something stiff for multi-cell lights, I recommend this spring. It is very stiff and easily handles multiple 26650s.
Hey Richard, will you be getting any more XHP70 P2-1C and XHP35HI E4 (1A’s) emitters in any time soon or in the future? Have you seen or know about any different tinted XHP70 P2 binned emitters too?
The lumens output is similar between the two---slightly higher on the 319AT, but it is also floodier. So, if you want a little bit tighter beam, I'd go with the 219C, but if you want more flood go with the 319AT. Tint is pretty much identical.
I'm not sure. The P2 was a rare thing to see in XHP70...I only got them twice: once from Cutter and once as a sample batch. They didn't have an official order code, so it was just by luck that you would get them when you ordered 1A. I am not planning on getting any more of them. It looks like XHP70.2 has a P2 order bin when they come in, but who knows what the tint will be like on those (hopefully better than XHP50.2).
XHP35...I am probably going to sell what I've got and be very selective about what I order. They just don't sell---not enough flashlights and drivers that can easily use them.
New H2-C drivers might make XHP35 and XHP35 HI more popular. I did some testing on H1-A and H2-C, they show real potential.
If you decide to reboot your own boost driver project btw, I would happily pay upwards of $20 for a boost driver with similar specs, a customizeable UI, and known component limits.
How much current do you have going through it? I had one at about 9 amps and it did okay, but of course pumps out a lot of heat. This was on 2 Liitokalas.
Did you see it turn towards a bluish tint as it heated up?
Uh, yeah, 8.4v was already too much for the old XHP50, the 50.2 has even lower Vf so wiring it directly to 2s would instantly blow it.
You need to use a 7135 or buck constant current driver.