TallNHairyDave
Newly Enlightened
I'm currently building a 4D Mag in a black 4D host with a DIY custom heatsink, running 4 x 18650 cells through a Blueshark w. Remora to drive a 7 x Cree XPG board with khatod optics.
First task was to mod the switch assembly so it would work with flat top 18650s as I'm going to use AW's excellent 2600mah protected cells in here. (Ignore the bits of flash still attached in this pic from where I cut down the bottom of the switch on the lathe, I've since trimmed them off cleanly.)
(ooops. I got the Mrs to take the pics and she put the negative contact/grub screw back in the wrong way round before she took the photo and didn't notice! :laughing: It doesn't stick out like that in reality!)
And also chop off the pillar that would hold the original bulb, and drill a hole to be able to wire up the -VE contact.
The heatsink is in progress on my small hobbyist lathe at the moment - just roughing out the interior "cup" to house the LED board and optics (which is why the finish isn't perfect - it's deliberately undersize at the moment so I can make tiny finishing cuts to get it to the final size once it's "almost there").
Turned down from a 50mm diameter aluminium bar and it's a single piece construction with a fairly long tail to extend into the mag body for good heatsinking. This will leave just enough room for the BlueShark/Remora board on it's heatsink. For reference, I've bored out 8.1mm so far; just waiting for the LED and optics to arrive so I can measure the height and confirm how deep I need to go (I think it's 13.9mm but want to make sure first!)
The heatsink will extend both into the body between the head and the top of the switch, and fill the head of the mag. Should make for some decent heatsinking, and initial tests by just putting it in the torch without any thermal grease and then heating it up with a butane "blue flame" lighter show that it transfers heat to the body and head of the torch nicely.
Bought one of allburger's 18650 spacer + tailcap mod kits to mount the cells and handle the tailcap connection. He's made me a custom version of his kit which is normally to fit 2 x 18650s in a 2D. Just waiting for it to arrive.
And finally, HUGE cheers to TX101 for all his advise on the build so far with which electronics bits would be best to drive the 7 x Cree XPGs and how best to put together a balance charger for the 4 x 18650 cells that'll drive it.
More pics and write up as I progress.
Dave
First task was to mod the switch assembly so it would work with flat top 18650s as I'm going to use AW's excellent 2600mah protected cells in here. (Ignore the bits of flash still attached in this pic from where I cut down the bottom of the switch on the lathe, I've since trimmed them off cleanly.)
(ooops. I got the Mrs to take the pics and she put the negative contact/grub screw back in the wrong way round before she took the photo and didn't notice! :laughing: It doesn't stick out like that in reality!)
And also chop off the pillar that would hold the original bulb, and drill a hole to be able to wire up the -VE contact.
The heatsink is in progress on my small hobbyist lathe at the moment - just roughing out the interior "cup" to house the LED board and optics (which is why the finish isn't perfect - it's deliberately undersize at the moment so I can make tiny finishing cuts to get it to the final size once it's "almost there").
Turned down from a 50mm diameter aluminium bar and it's a single piece construction with a fairly long tail to extend into the mag body for good heatsinking. This will leave just enough room for the BlueShark/Remora board on it's heatsink. For reference, I've bored out 8.1mm so far; just waiting for the LED and optics to arrive so I can measure the height and confirm how deep I need to go (I think it's 13.9mm but want to make sure first!)
The heatsink will extend both into the body between the head and the top of the switch, and fill the head of the mag. Should make for some decent heatsinking, and initial tests by just putting it in the torch without any thermal grease and then heating it up with a butane "blue flame" lighter show that it transfers heat to the body and head of the torch nicely.
Bought one of allburger's 18650 spacer + tailcap mod kits to mount the cells and handle the tailcap connection. He's made me a custom version of his kit which is normally to fit 2 x 18650s in a 2D. Just waiting for it to arrive.
And finally, HUGE cheers to TX101 for all his advise on the build so far with which electronics bits would be best to drive the 7 x Cree XPGs and how best to put together a balance charger for the 4 x 18650 cells that'll drive it.
More pics and write up as I progress.
Dave
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I really wasn't sure it was going to work at all!
