12xCXB3590 Passively Cooled

benbud89

Well-Known Member
Thank you for sharing your neat build and information, Netherfly. How much time had passed before you took the temperature of the holder? My main concern, is that I dont know what average temperature a 40w heat sink is going to be. Your cob may dissipate 35ws, but at about 60% efficient, only 14w of those are heat. So it is difficult relating to the issue., and understanding what temperature level they are going to give off. THanks again :)
 

deakus

Member
The problem is the shipping. I got a quote on 24 60W sinks from those guys and although its only $175 usd for the sinks, its $120 usd shipping.
Try and source locally is my only wisdom! Im in the UK and in the process of starting a small business making LED growlights,I spent hours getting info on supply of heatsinks...managed to find a supplier for similar spec as Netherfly at a moderately decent price inc shipping
 

VANNELLE

Active Member
here are some heatsinks for people who are on a low budget, just like me.
I paid 2,49 each , got them from servershop24.de

They look Alu but infact the base is red copper, in the middle aprox. 10 mm thick, they weigh 650 gr. each.
They come with a alu casing with is ideal for handling and drilling the heatsinks. they protect the fins.
You can remove the casing when finished.
I will put a 80mm fan on them but its possible to bend them for passive use.

They meassure 83x90 mm, height is aprox. 65 mm.
The square in the middle is 58 x 58 mm. i allready predrilled the holes for a ideal cob holder for my 3590's.
 

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Netherfly

Well-Known Member
Thank you for sharing your neat build and information, Netherfly. How much time had passed before you took the temperature of the holder? My main concern, is that I dont know what average temperature a 40w heat sink is going to be. Your cob may dissipate 35ws, but at about 60% efficient, only 14w of those are heat. So it is difficult relating to the issue., and understanding what temperature level they are going to give off. THanks again :)
The temps tested earlier (first page) where quite long term.
I don't think the temperature will ever exceed 40/42 degrees celcius, even with 23.5 in the room it's below.
Everything was done with the ventilation in the tent still @ the lowest setting.

@VANNELLE nice sinks, damn that's good money for heatsinks of that material and weight!
 

2ANONYMOUS

Well-Known Member
looks great my plans are same heat sinks from cutter ,, tho great build i think for some its much cheaper to find the square tubing drill holes in corners and every where use butterfly nuts so you can actually turn the lights might be a good idea
 
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