I try to keep the laser on for 1 min and let it cool down for 30 sec, but I am just keeping om yhe safe side. I've kept it on before for 3 mins and it just got a little bit warm. The focus head is actually jayrob's EzFocus adaptor, I like the look of it on this host.
Here's a vid of the laser burning a toothpick, a piece of paper (actually lights the paper on fire), and a piece of plastic.
I fail at embedding so someone please embed for me :P
I built this little guy last week before flying out to New York. Now that i'm back, I had some time to take pics and make a video. Basically I had this host lying around for a while, and after getting back into lasers, I decided to build a 445 out of it. The heatsink is a direct press-fit copper...
You said it! This new generation of laser hobbyists are spoiled! :P
This kind of power a few years ago was UNHEARD of for PHR diodes, and you'd have to spend $200 on a 6x burner to get that kind of power, and even they weren't as efficient as this PHR I have :O
First, some background info... So, as many of you know, i've been out of the laser hobby for a while. A good two years. All this time I had a PHR-803T diode laying around. What got me back into the hobby, was my buddy going camping, and asking me if I could build him a laser to take along. I...