A tiny SL SL-20XP upgrade post.

dano

Flashlight Enthusiast
Joined
Aug 11, 2000
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Location
East Bay, Cali.
I was a bit bored, today, so I found my old Streamlight 20XP and brainstormed.

I went to the local Hobbytown and bought a cheapy 3000MAH NiMH 6 cell pack, and with some contorting made it into a 5 cell stick. After cleaning the terminals and a little bright red shrink wrap it was good-to-go for the 20XP.

Then I thought about a lamp option. I had an old out-of-focus 35X lamp. Using a dremel, I ground the ceramic potting compound and removed the lamp. I tried a few different lamps, but settled on the original 35X lamp. I repotted it, BUT adjusted the focus. This lamp is beyond bright with proper focus. If SL would take the time to focus their lamps in the reflectors, it would make a huge difference in light performance for the SL-series of lights.

Minor flubs: the shrinkwrap was a bit too think for the battery stick, and rubs the inside of the light body. Not a huge issue as it does fit. At least the stick doesn't rattle. I used a hi-temp ceramic putty from Arcticsilver (bought at Fry's) to re-pot the lamp. It's non conductive and the website didn't give me a heat rating. So far, it's worked o.k. I'd like to find some of the real ceramic potting stuff (and it was mentioned here; just have to do a search). Also, the 20XP is a plastic bodied light. Not sure what the sustained heat from the 35X lamp will do to it (I already put a UCL lens in the light).

Runtime, estimated, should be about about an hour, probably slightly less. I haven't checked for fear of meltdown. /ubbthreads/images/graemlins/buttrock.gif

Not including the wait for the putty to set, the whole ordeal took about an hour, of which I watched the Tuttels make a bad-arse bike for the I, Robot movie.

--dan
 

Ginseng

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Joined
Feb 27, 2003
Messages
3,734
Dan,

Sounds like a very worthy mod indeed. Was that a sub-C pack I imagine? The SL-35X LA definitely makes for a brighter light. I've used them in my SL-20XP unmodified and really like the diffuse floody beam. Great for gently lighting up a broad area. I think the degree of defocus is intentional as that combined with the satin finish reflector results in beam that is uniquely smooth and meaty. Also, js and I have noted a pretty consistent degree of defocus across quite a few LAs.

Could you describe how you fixed the bulb in place while the ceramic putty set up?

Wilkey
 

dano

Flashlight Enthusiast
Joined
Aug 11, 2000
Messages
3,884
Location
East Bay, Cali.
Yea, sub-c's...

I put a few layers of scotch tape over the rear reflector opening, then pushed the lamp assembly thru the tape, so the lamp's pins pierced it. I then used a 2 AA cell battery holder to light the lamp and focus it. I did this so the lamp wouldn't heat up and set the epoxy too quickly.

Kind of quirky, but worked o.k.

--dan
 

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