A twisty solution for the old Kroll

[TranquillityBase]

OK...I gave up:sigh:

RV7, said his NiMH drivers need a good quality switch, and the Kroll is a no go for this driver...I was pretty sure it wouldn't work, but no harm in trying.

RV7's NiMH driver pulls about 1850 mA at the battery side, so the Kroll is out:thumbsdow

This driver really sings with the direct connection offered by a twisty design...The exciting side benefit is, this 'twisty screw' can be adapted to other existing Kroll bodied lights:twothumbs

I didn't mod the cell tube, and a #15 o-ring works excellent for sealing the plug, while offering good resistance for setting preload on the 1AA cell. I used the old Sharpie for a line of reference, then I set the cell preload...No worries about damage to the driver, the cell tube bottoms out, long before too much stress would be loaded on the driver board.

The end results are fantastic, no DMM or light meter necessary...My 1AA light warmed up much quicker, and the difference in brightness was very easy to see.

 

[Bullzeyebill]

I am glad you worked around the problem. I too wish that the Kroll could handle higher currrent, particularly with my VIP delivering 1 amp to the led with two AA NiMh's. Kroll works for awhile but cause premature drop off of current and voltage to led. I would like to have one of those if you could see fit to produce some.

Bill

 

[Nebula]

TB - Another nice job! I ordered a couple of RV7's boards recently and would be interested in learning more about your mod. Any idea where a mooch (ME) can find a couple of those fancy little screws? 😗.

Kirk

 

[TranquillityBase]

Oh baby!

I think this one has potential...I just may end with a light, that has a Sapphire lens, on both ends...Dang, now I gotta start all over...😉

 

[kenster]

What the who what is that??????? 😱oo: Is that one of those Trit Spheres like Bart is selling? SHEESH! You sure have been having a lot of fun and turning out some very cool stuff that`s for sure! :thumbsup: Mr BEADBLASTER! 😉

 

[TranquillityBase]

What the who what is that??????? 😱oo: Is that one of those Trit Spheres like Bart is selling? SHEESH! You sure have been having a lot of fun and turning out some very cool stuff that`s for sure! :thumbsup: Mr BEADBLASTER! 😉

Ya ain't seen nuttin yet...

I need to figure out how to shock isolate the globe, and seal it in, just in case...

I can seal the end off with glass, but I'd like to keep the slots, and add three more slots, offset 120 degrees from the first set of three. How can I seal the slots??? I need a glass sleeve.

 

[kenster]

Well, you have a Lathe and a Milling Machine, right? You might want to think about making a newly designed tailcap to better accomodate some windows that you can make somewhat water tight a lot easier and don`t blast the inside where the Trit Shere is placed as well since I think that would make it look even cooler since it would reflect off the Ti. Just a thought? 😉

 

[mahoney]

Nice looking solution!

For those of you without a lathe...you can replace a Kroll with a modded AA Mini-mag tailcap. The mod is simple, remove the spring and the spare lamp, but save the plastic sleeve the spare lamp stores in. Get a large headed copper harness makers rivet at the hardware store with a shank at least 1/4" longer than the plastic sleeve. Put the rivet in the sleeve and replace the sleeve in the tailcap so that the head of the rivet will contact the end of the batteries. You may need to cut the rivet shorter to fine tune the point at which the batteries make contact when you twist the battery pack. A copper or aluminium nail would probably work as well if you can't find a rivet.