Need some hints for Mag head

[Vermonter73]

Hi Folks

I'm getting addicted to CPF Just when I think I start to get things figured out, I discover more options! ARGH!

I'm researching my options for a bike light. I think I'm going with a modified Mag head. I have an old 3-D that would make a great donor.

But I need some hints as to where to find reflectors and how to mount the emmiters. I've found lots of individual pieces, but haven't quite figured out how it all goes together.

I'm thinking of using 4 XR-Es.

I'm also wondering how I open up the head.

If there's a better choice for a nice looking compact head with a good amount of spill, please let me know.

Thanks for the help. I'm going to get some work done now. Honest.

edit:
This is what I've come up with so far -
Use a Perfect XR-19 Heatsink http://theledguy.chainreactionweb.com/product_info.php?products_id=912
mount 4 emitters to it. Then put 4 McR-19XR reflectors on the emitters http://theledguy.chainreactionweb.com/product_info.php?products_id=917

Secure that inside the head. Will there still be room for a driver? Preferably the bFlex. I'll put some type of cover on the back, with a switch. Maybe a remote switch.

Will the Mag head have enough surface area to dissipate all that heat? What type of beam will I get from the 4 McR-19XR reflectors?

Then I just need to run wires to a battery pack in a waterbottle. I'm thinking of using one of the BatterySpace Lion w/ charger.

 

[DonShock]

You can fit the tailcap into the open rear of the head to finish it off nicely. Although it's a tight fit, there is a little room for a switch and driver between the tailcap and the heatsink. I've done it before and it comes out looking pretty nice. Although the head and tailcap won't thread together, I've just used a thick o-ring on the tailcap to hold them together. The thick o-ring gives plenty of tension to hold the tailcap firmly in the head, maintains the watertightness, but can still just be pulled apart if needed. It might not work if there was a lot of tension trying to pull out the tailcap, but would be plenty firm enough to operate a mounted switch without worry. For a more permanent connection, I had thought of using a couple of set screws in the head to hold the tailcap.

 

[Vermonter73]

Thanks for the info!

Which heatsink did you use? Which emitters and reflectors?

I'm also wondering if anybody knows if I could fit three McR-27 reflectors instead of four McR-19s, and get a wider beam? I assume four McR-27s won't fit?

 

[DonShock]

That's just a spare Perfect XR19 Cree Heatsink in there to show clearance, no other parts installed. The one I actually built had even less clearance since I used the stock reflector, no heatsink, and a 6D incandescent bulb powered by an external 9v battery. I took it apart later to use the parts for other projects. I just figured a picture was worth a thousand words.

 

[Vermonter73]

Thanks for making the pic for me!

 

[cmacclel]

You can fit 3 or 4 19mm reflectors. The 27's won't fit at all unless you only want one

If your by my way on a weekend we should be able to throw something together.

Mac

 

[Vermonter73]

Duh, I fin@lly figured out how to get better se@rch results!

Double-duh, I got the head apart.