Sloppy china practices (example)

how about

martin

I got a free chinese NiMH charger with a camera, it charged only partially the batteries and I opened it, looking for the controller chip and the algorithm used. You can see the inside here (there were no components in the other side):

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Regards
Miguel Giménez

Well... the Chinese *can* build to whatever quality level you're willing to pay for. Many Chinese *designs* are junk because they know, in many cases, consumers are ignorant: Many computer "enthusiast" "think" they need a, say,

500W power supply when they really only need a solid 250W device. If you toss truth-in-marketing out the window, clearly it's a win to advertise a 250W power supply at 500W to give yourself a competitive edge, right?

I think you looked wrong. IIRC the 5400 series are 50Hz AC rectifiers and therefore too slow to act as a rectifier diode in a switch mode power supply.

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Reply to nico@nctdevpuntnl (punt=.)
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Sure, it will also tell us that chinese goods have way higher probability of unreliability. And in the event of a construction that requires that components are to specification, may give a new meaning to "chinese fireworks".

I like it :-)

(considering what I have seen so far)

In watching this video, I never thought it could be like this. Makes American factories seem, well there are no American factories.

I sort of question why modify a SMPS if for the the same money you can buy one with 25 A total on 12V? I have a big CB transmitter (150W pep) and it has same output at 11.8 as 13.8 V. Only display backlight dims a bit.... Some of those supplies have 12V 14A and 12V 15A for example, outputs that possibly can be used in parallel. Some time ago I checked almost a hundred of those PC power supplies just for my transmitter. Some can simply do 12V 25A.

I ended up running the thing from a sealed lead-acid that is constantly under charge to reduce hum and ground loops (audio is via the PC).

ISTM the bomb should have a strikethru or the "DOES NOT CONTAIN" should be "CONTAINS". ...or am I missing something?

I couldn't immediately think of a suitable icon I did it very quickly, just as an idea,

just a random idea

martin

Given that probably >90% of all consumer electronics comes from China these days, that would be the case even if they didn't engage in crappy engineering/specsmanship. :-)

Very true... anyone who actually cares about their specs needs to test them themselves, or at least try to find some test documentation from a lab they trust.

"Free of china manufactured components" ..? ;)

Kind of like the "Intel inside" (or "Intel free" :-)

(Maybe a bit rude, bit until the gov in .ch deals with it..)

It's a battery cooker? D from BC

I evaluated a name-brand Japanese switching supply against the MeanWell chinese equivalent. The MW was better. 48 volts, 150 watts, open frame, $42.

John

What a terrible name though. Kind of like this one:

I have an NiMH battery charger (made in China by or for a Taiwan-based company). It's beautiful.. separate switchers for each cell as well as the off-line switcher. Light, small, and it was cheap to buy in a Taipei shop. If you buy the cheapest electronics at the cheapest place (or the cheapest tools) you're likely going to find problems. There are seemingly legitimate Chinese companies like the 2000+ employee company that was spamming us here a while ago who put fake UL markings on their products. Buyer beware, but most of the stuff is quite good these days and getting better and better every year as they get the latest production equipment. OTOH, there are fast buck artists and they have an alarming tendency to try and compete each other into the ground, which is not necessarily good for buyers and end customers.

Best regards, Spehro Pefhany

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Made in China, but with Japanese ass kicking.

amps

As

A lot of Japanese equipment is made in China.

Leon

How about the PC power supply maker "Sparkle"? Then there's always "Lucky Goldstar", now just LG.

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  Keith

brand

amps

As

the

Japanese management of their China (and other offshore) operations is pretty good from what I hear. They're famous for micromanaging their auto parts suppliers in North America. There is a HUGE difference between investing in a manufactruring operation in another country and just contracting some local company to build something for you with little or no oversight (eg. at least one US bench power supply 'manufacturer'). I guess it's just too tempting to buy something with your name on it that looks about the right size and shape and nominally works for $20 and sell it for $100 ($200 retail) compared to actually ensuring that the quality is there on every single unit (which might cost an extra $5 or $10).