The Chinese Quantum Board Knock Off Builds

[ApfelStrudel]

Theres a way to tell B+ apart from C version visually by looking at the die behind the phophor. I know someone posted examples in a thread sonewhere but cant remember where. Maybe someone can remember?
Pretty sure it was this thread:
https://www.rollitup.org/t/new-style-samsung-lm561c-board.955201/
Its quite long and full of the usual shitty arguments between a few people.
Anyways doesnt really matter as you can make up for lower bin by driving softer.
For that price for extrusions i dont import from china, but they are very nice for its purpose.

The dark spot in the dies is the tale tale

I'm in Europe, everything is nasty expensive round here

But like you said it's no biggie if you take it in the account. I run those chips at 85mA a pop so 0.256W a chip and they put out

 

[EmeraldØsiris]

Ok

Nice boards

 

[BIANCAADA6]

Kingbrite qouted me this is this a good deal?

 

[EmeraldØsiris]

Why can't they wrap the boards and put them in padded envelopes? Seems like they are profiting from shipping...

 

[BIANCAADA6]

kit includes

 

[BIANCAADA6]

Why can't they wrap the boards and put them in padded envelopes? Seems like they are profiting from shipping...

Because its a kit sorry the list of the kit contents was second post.

 

[EmeraldØsiris]

kit includesView attachment 4256528

Oh you are looking at sets... 230 is killer though...

 

[BIANCAADA6]

Me and a friend are spliting the order.

 

[EmeraldØsiris]

Looks ok. Just make sure you buy with trade assurance and let them know you will send them back for refund if they are not top bin lm561c diodes. Make sure they state the bin in the sales invoice.

 

[BIANCAADA6]

Looks ok. Just make sure you buy with trade assurance and let them know you will send them back for refund if they are not top bin lm561c diodes. Make sure they state the bin in the sales invoice.

Thanks I will email them.

 

[EmeraldØsiris]

Check this out first: https://app.alibaba.com/dynamiclink?touchId=60794587965&type=product&schema=enalibaba://detail?id=60794587965&ck=share_detail&ck=share_detail&shareScene=buyer

 

[EmeraldØsiris]

I'm not sure what is one carton though

 

[EmeraldØsiris]

They are the 301b's. Not sure how many kits are in one carton... I've bought from Meijiu before and I wouldn't recommend any others.

 

[EmeraldØsiris]

Yeah, these are cheaper than Kingbrites and better diodes, plus free shipping to the US.

https://app.alibaba.com/dynamiclink?touchId=60765665243&type=product&schema=enalibaba://detail?id=60765665243&ck=share_detail&ck=share_detail&shareScene=buyer

 

[Rocket Soul]

kit includesView attachment 4256528

I never get drivers from china for warranty purposes, better from digikey if it breaks so you can get us service.
Heatsinks, generally their heavy and costly to shipp, but if they come with all the right holes it might be worth it cause its easy to setup.
Heatsinkusa.com has heatsinks which are probably better. But its i hassle to get the cut and fixed for mounting. 20 boards only, should be around 500+shipping. Another 550 for drivers from digikey. Actually, i thinknits a good deal but not sure about taxes, but you can allways make them do you a cheaper invoice.

Also, not sure if those drivers will run the boards at 100%, only 48V and i think the 288 boards are almost 54. Ask Jerry Kingbrite about the voltage.

 

[ApfelStrudel]

Oh you are looking at sets... 230 is killer though...

That's for 10 kits

 

[EmeraldØsiris]

That's for 10 kits

Yeah but they are $132 per kit

 

[BIANCAADA6]

The unit cost deliveried plus i guess customs will be 160.00 a set.

 

[Rocket Soul]

The unit cost deliveried plus i guess customs will be 160.00 a set.

What space are you covering, what dimensions?

 

[BIANCAADA6]

Do u think its a good deal? I have 2 sets hlg 288 from hlg they were like 660.00. im wanting to run 5 sets over a 4x9 spot.