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I really like my triple shot but I would like a bit more light on the periphery of the beam. Does anyone have any ideas for upgrading the LEDs? Seems like it could be less $$ than selling and buying the triple pro.
No, the slug on the XR-E is isolated so there is no need to bother for that LED. It's the P4 you need to isolate. However since the slug on a Luxeon isn't isolated either (but is -ve, whilst the P4 is +ve) the light should already have electrical isolation between the LED mount points anyway (in the commercial light I've pulled apart this seems to be achieved using an anodised heatsink plate).Low_Rider said:I have heard of a couple of riders upgrading the emitters to better binned Luxeons (which is a straight swap), but changing to a Cree XR-E or Seoul Semiconductor P4 emitter would be a big undertaking due to different sizes and physical layout.
If using the Cree XR-E emitters you would have to contended with isolating the bottom of the package (I have posted a few techniques on how to do this in the past), and then find suitable optics or reflectors that would fit back in the housing while retaining a decent focus and beam.
The bottom of the substrate on the 7090 package used in the Cree XR-E is designed for SMD soldering, and has three pads which are positive and negative contacts, with an electrically isolated central pad for heat spreading. If the Cree XR-E is not on a star it will need to be isolated, otherwise there will be a dead short across the emitter. The Cree XR-E General and Thermal Management datasheets cover this to a degree.chrism said:No, the slug on the XR-E is isolated so there is no need to bother for that LED.
Ah, but if you're worrying about shorting the bottom pads you're presumably not planning on using them to connect to the LED, so simply cut the traces on either side of the LED to isolate them, which seems to be the standard solution with these when using the top connections.Low_Rider said:The bottom of the substrate on the 7090 package used in the Cree XR-E is designed for SMD soldering, and has three pads which are positive and negative contacts, with an electrically isolated central pad for heat spreading. If the Cree XR-E is not on a star it will need to be isolated, otherwise there will be a dead short across the emitter.
Don't want to highjack this thread, but I would like to ask Low_Rider's opinion on the new Princeton Tec Switchback LED lights. I read on an add that they used 3W Maxbright LEDs.Low_Rider said:Ignore our rambling rideandshoot, we tend to get a little carried away!![]()
If you post some photos of the lens cap and optics, along with measurements like optic height and diameter, and housing depth from the base that the emitters sit on to the top of the housing, we'll see what we can work out for you.
You mention that you're struggling with your periphery vision, but is the light output in general enough for you? I'm just wondering if an optic swap might be an option rather then an emitter upgrade.
Dave.
I like the Switchback 2. It has a cleaner beam pattern than the CatEye Double Shot.rideitall said:Don't want to highjack this thread, but I would like to ask Low_Rider's opinion on the new Princeton Tec Switchback LED lights. I read on an add that they used 3W Maxbright LEDs.
What is your take on the lights and the LED used.
thx
James, saw some of your posted info on the TS vs TS Pro (http://acidinmylegs.blogspot.com/2007/01/pro-or-no.html), the light from the TS Pro looks pretty damn good.[email protected] said:I like the Switchback 2. It has a cleaner beam pattern than the CatEye Double Shot.
I'll have beam shots up when my review -- the one that low-rider mentioned -- is finished... any day now. I am working overtime to get it wrapped up.
rideitall,rideitall said:James, saw some of your posted info on the TS vs TS Pro (http://acidinmylegs.blogspot.com/2007/01/pro-or-no.html), the light from the TS Pro looks pretty damn good.
You also mentioned that the Switchback 2 had a cleaner beam pattern than the CatEye Double Shot.
Have you had a chance to compare the SB3 vs the TS Pro at least in terms of setting up a comparison shot like what was done with the TS and TS Pro.
One last question is regarding the ability to upgrade the LED in an off the shelf lightset. From a quick glance it looks the the Princeton Tec Switchback 3 can be opened up. What LEDs are used in the light and could these be upgraded/changed out to newer LEDs mentioned in other threds (Cree XR-Es or SSC P4s)
I am teetering on buying a SB3, so any info you can provide would be appreciated.
Many thanks for you help on this.
As I mentioned previously, they use Lumiled Luxeon emitters driven at 3 watts per emitter. You can probably put any emitter and optic combination in lights like the Switchback series and the Cat Eye lights if you were prepared to research and put the time in, fabricating new parts and stuffing about getting things to fit.rideitall said:One last question is regarding the ability to upgrade the LED in an off the shelf light set. From a quick glance it looks the Princeton Tec Switchback 3 can be opened up. What LED's are used in the light and could these be upgraded/changed out to newer LED's mentioned in other threads (Cree XR-Es or SSC P4s)
I am teetering on buying a SB3, so any info you can provide would be appreciated.
I appreciate your input on the matter. If I end up buying the lights I would not look attempt modifications right away (mostly because I am cluesless to this sort of thing) however down the road ... who knowsLow_Rider said:Don't get me wrong, I'm all for modifying and playing around, but unless it's on an older inadequate light or you find a real bargain (not likely seeing they have only just hit the shelves so to speak) I think it's a bit silly.
Dave.
give him a break - it's been one dayrideitall said:bump bump bump ..
James
Any insight TS Pro or PT SB 3
Jeff
[email protected] said:I'll post here and on my blog when the review is live. It'll be soon now. A couple more late nights and I should have it.