nc208
Well-Known Member
Is there a max safe operating temp? My heatsinks never go above 86 degrees Fahrenheit. I' blown away you guys are running yours at 75 degrees celcius.
New style Samsung LM561C Board
- Thread starter chuckduck
- Start date
legalcanada
Well-Known Member
yes the operating range of diodes according to samsung is -40C to +85C and max storage temp is -40C to +120C. i guess it could also depend on the design of the fixture
i run my boards hard, although only 1400ma and HLG states max current of 1600ma for the qb304 (115-120v). i figure if they last a couple years i'm more than happy, i'll probably be replacing them before they die anyways
i run my boards hard, although only 1400ma and HLG states max current of 1600ma for the qb304 (115-120v). i figure if they last a couple years i'm more than happy, i'll probably be replacing them before they die anyways
Randomblame
Well-Known Member
Hmm! The temp differences are no wonder!
If, then you have to compare both with similar load. Yours run only with about 100w per board.
So the temps are mainly different because the QB run at around 150w to reach 75°C and also with 10% less diodes.
You should run your boards at ~160w and compare temps again then it would be a fair test.
chuckduck
Well-Known Member
Solid point. If I was to run these on a 2100mA driver the most I'd get would be 140 watts.
Sounds like my issue must be the driver. I took apart the troublesome section and ran each board individually on the driver and they would both start up but then turn off after about 8-10 minutes. Maybe I should double check my wiring on the cord. But the next step will be to get a new driver and see if that fixes the problem. I'm going to need a few anyway for the new boards coming. Any other suggestions?
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nfhiggs
Well-Known Member
Yeah that's almost certainly a faulty driver.
Randomblame
Well-Known Member
That's realy sounds like a driver defect. Can happen sometimes but I'm pretty sure you will get a new one simply because it's a Meanwell driver
Space Genetix
Well-Known Member
We have a few of this boards working now and they work very fine but I ask the seller by ebay if are real LM561C.yes i have a feeling that's what it is - they probably have piles of these 561b diodes or boards already made and now no one wants them anymore, and soon enough people won't want the 561cs either it'll be the 301bs or whatever. ha ha ha. a friend was considering purchasing these boards off ebay, 2x 308 boards for $150 euro ... i think they are the wrong type and told her i hope she hasn't already purchased ...
@chuckduck i really look forward to following your progress - it will be interesting to see if there is much difference between the 2 sides of your tent. i guess it'd be hard to gauge unless you were monocropping the same clones or something, and there will be quite a bit of overlap near the center. a lux/par meter will be interesting to see as well.
either way i'm sure they both will produce great, so i guess you can look at it like you paid full price for the lm561c and got the lm561b for $17.50 a board... not too bad! maybe i'll ask him if he'll sell the 561B boards for $20 eachafter seeing some par numbers hopefully
https://www.ebay.es/itm/202140578473?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649
Randomblame
Well-Known Member
Sorry, but the diodes looks like LM561b or b+!
A few pages back are some macro shots of true LM561c!
These boards are overpriced, for 75€ a piece you get real Quantumboards.
You can get similar boards with 336 of these LED's for half the price. Links are already posted somewhere in the thread.
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Victor6634
Well-Known Member
I would rather spend the extra money with HLG and get a true tested product and not have to worry.With the time they spend testing these boards it’s worth it to me.
Randomblame
Well-Known Member
Especially when the other boards costs exactly the same I would always prefer the originals.
The selller has exactly 3 products on e3ay and looks like a private who's trying to make some extra cash with re-selling these boards as well as COB/heatsink kits and small 60w Meanwell drivers.
I have no problem with that, he should only convince himself that he sells real ones if he claims it. Otherwise, if he act willfully or at best be negligent, both can cause problems if someone opens a case against the seller.
Ebay offers buyer protection so you can at least get your money back, but in the worst case, he has to expect an expulsion if he acted willfully.
The selller has exactly 3 products on e3ay and looks like a private who's trying to make some extra cash with re-selling these boards as well as COB/heatsink kits and small 60w Meanwell drivers.
I have no problem with that, he should only convince himself that he sells real ones if he claims it. Otherwise, if he act willfully or at best be negligent, both can cause problems if someone opens a case against the seller.
Ebay offers buyer protection so you can at least get your money back, but in the worst case, he has to expect an expulsion if he acted willfully.
Good luck to find in inventory....Like slate heat sinks ha
Prawn Connery
Well-Known Member
That's why I bought Samsung strips. No heatsink hassles - U channel seems to do the job - and no worries about fake or wrong spec LEDs. Even QBs are hard to get - you've got to be right on it when they restock, otherwise they sell out in days, sometimes hours.
Cobkits has both in stock!
Fra91
Member
sorry if I intrude in the discussion and I apologize already in advance for my bad English. I buy from the guy on ebay (the one that sells two pcb cards at € 150) the lamp complete and I paid € 750 should arrive at the beginning of January. I also ordered 8 pcb cards from alibaba from two different suppliers, even those arriving in mid-January. you may be interested I keep you updated
For European buyers, I am about to receive some boards to test from a shop within Europe.It has 342 lm561c s6 az bin.This shop will also provide me an apogee sq-520 to take different reading from different distance and configuration.They say board is completely passive up to 2100 mA with a little airflow inside tent.Hope this could help other people struggling to find genuine board within Europe
DankaDank
Well-Known Member
Looks like this eBay seller is buying these boards from Shenzhen Hansion Technology.
CLICK HERE FOR LINK
Now we know Hansion and Mufue are dodgy.
Fra91
Member
I bought both hansion and mofue and I paid $ 40 per pcb And Jeff from hansion confirms having sold the pcb board to ledgrowsolutions in Spain
In europe I found this one https://www.ebay.es/itm/Samsung-LM561C-S6-3000k-308pcs-DIY-LedGrowBoards-x-2-PCS/202140578473?_trkparms=aid=777003&algo=DISCL.MBE&ao=2&asc=20170831090935&meid=eea0b420fa9f4da4a49789b9b936407c&pid=100012&rk=1&rkt=7&sd=202105276119&_trksid=p2047675.c100012.m1985Can you post a link? Thanks
And I think it is damn expensive 150euro for 2 boards
EDIT: ok I arrived late as always. cheers guys
Did you manage to buy just 1 or 2 boards or did u had to place a bigger order?