medicinehuman
Well-Known Member
Did you flatten and smooth(sand) the heat sink surface?
Some of those alpine 11's have dome tops.Yeah, pretty sure it's a bad thing. Just not sure what the cause is. I'm guessing non-adequate thermal grease as I"m just using the TIM that came with on the heat sinks.
Did you flatten and smooth(sand) the heat sink surface?
I believe I'm using the same alpine 11 plus as captainmorgan. However, I forgot about the sanding portion, I didn't know if this was integral or not.Some of those alpine 11's have dome tops.
That's what I use too, but it is important for heat transfer that you sand flat. I believe that is what went wrong, take em apart and clean and put sand paper on something smooth like glass on a workbench and criss cross your heatsink surface on it . I used several grades of good sand paper, 400 to get it flat and then went with 600 then 800 then 1000 and last was 1500. It really doesn't take long to smooth. Use a good thermal paste, I used Artic silver there's better out there. I just tore one down and checked my paste job and it looked great. A real flat surface and the cob being stiff and flat squished out any extra paste. Someone may correct me if I'm wrong.I believe I'm using the same alpine 11 plus as captainmorgan. However, I forgot about the sanding portion, I didn't know if this was integral or not.
Awesome, sounds good to me, thanks.That's what I use too, but it is important for heat transfer that you sand flat. I believe that is what went wrong, take em apart and clean and put sand paper on something smooth like glass on a workbench and criss cross your heatsink surface on it . I used several grades of good sand paper, 400 to get it flat and then went with 600 then 800 then 1000 and last was 1500. It really doesn't take long to smooth. Use a good thermal paste, I used Artic silver there's better out there. I just tore one down and checked my paste job and it looked great. A real flat surface and the cob being stiff and flat squished out any extra paste. Someone may correct me if I'm wrong.
Not nearly as much smoke as that, but yeah pretty much that emanating from behind the COB. With the fans blowing it's actually kind of hard to tell where the smoke is coming from, but I really don't want to test anything else until i get everything cleaned, sanded and properly coated with TIM before so I don't completely fry something.It could be something similar to this but from the back?...
Or like others have said...Stock TIM and no surface prep could be it just as likely.
how large of an area will this setup cover?Yes very handy!
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Does anyone know what kind of fuse to put on the DC side of an led driver for cxa 3070s? I have read that a 2 amp auto fuse will work but most of those are rated for either 12 or 24 volts. I understand that my driver puts out approx. 39 volts or so at 1.4 amp. Do I need to find a fuse that's rated for the max voltage as well as current?
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I aswell am looking for how to choose a fuse. From what i have read, wouldnt you want to put thefuse on the ac side of the driver? So when it blows it shuts off the driver. If you had a fuse on the dc side wouldnt the driver still be on and powered? It is my understanding you dont ever turnon a driver without having the load (leds) properly wired. I have a meanwell 60 1400. So would I want a 2 amp fuse? On the hot wire ac side right or no?
That is a great point. Hopefully somebody with the knowledge will post. I am wiring 3 drivers in parallel to one cord so if the fuse tripped on the ac side all my lights would go down. I'm also not sure if the amperage in front of the driver would match the amperage on the DC side. I would rather fry an 11 dollar driver then a cxa 3070 though.
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Any one know what that means. LOLAs a brother around here ,would 've said :
RTFM !
(Read the f...n manual )
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Inrush current for LPC-60 : 51A at 230VAC / 26 A @ 115VAC ....
Input current : 0.5 A @230VAC / 0.9 @ 115VAC
Inrush is ~x10 of input current @ 230 VAC , ~29 x of input current @ 115VAC
Right fuse / circuit breaker for AC side for single LPC -60-1400 :
230 VAC 5 A T (=slow tripping / burn-up )
or
115 VAC 3A T
Cheers!