ChongX Capacitor test - Aliexpress JUNK - Buyer Beware! 

But not as fun😀

Well the Chinese were always good firework makers at least :) You have to give credit where credit is due lol.

Lmaooo

Lmfao. Thanks

@@kingflockthewarrior202 wtf. lol

😂

Black Cat ?

Very interesting, thanks for sharing. Do you know if precious metals, if any, were used in manufacture?

@@TrevorsBench The disc was painted both sides with silver paste. The silver paste came from Japan and it was placed into a kind of cylinderical ceramic conditioner with acetone and many marbles that needed to be "rolled" on a machine for 48 hours before it can be used, subjected to passing the viscosity test. The painted disc would be send to an 800 deg C oven to "bake" off all the impurities. The shiny surfaces on both sides were the plates for soldering the wire connectors. That was almost 50 years ago. Not sure if the production methods had changed now.

@@williamwong5627 Cool, thanks for sharing

100%

This is what Chong Li did after being beat in the Kumite by Frank Dux. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-3agwl3Dp0NU.html

HA ha ha ha ha!

Sounds like a Mortal Kombat character....finish him!

Guys seen this befor rated 63v but didn't even get to 16v 😁

Nichicons rock

Shame about the EOL announcement on Silmics, large, but so damn good!

@@gfriedman99 Panasonic, Rubicon for quality.

I never buy cheap parts. Never.

Sweden taxation: "let me introduce myself" Its literally over 10 times cheaper to buy from Aliexpress. One cheap 200uf 16v cap is over 1,5$ unless you buy china import caps lol

@@OutOfNameIdeas2 cheaper and crappier, you get what you pay for, you go to mouser and get quality parts...

Depends of the country.. in Argentina are very expensive thanks to de taxes and politicians..

@@nopochoclos still, for a tiny bit more you get better capacitors that meet specs that won't blow their guts everywhere ruining your design which all the parts to make that project, transistors, resistors op amps microcontrollers ect. costs more anyway then a few better quality capacitors, its like either you get better capacitors, or you risk flushing all of your hard work down the drain when one of em blows... There still really is no excuse, because it would save you money in the long run... Then if you buy more caps or parts then you need from a place like mouser, you get price brakes on stuff so you pay less for more anyway... Using horrible capacitors can also impact your design and make it under perform as well... Look at the ones he tested, their junk lmao. Even general purpose nichicons are better...

@@bobking7347 It seems that you are one of those who like to win the discussions, I repeat Argentina 1 dollar is equivalent to 200 Argentine pesos, let's repeat with me 200 more times, to this add the ridiculous customs taxes 50% of the cost of the product, to this 30% of Political theft called (solidarity tax), add more money that they charge you when you withdraw at customs, if you ask for curier type UPS / others they charge you all the same above and you must add almost 50% because it does not arrive in your city then they outsource the mail and they steal you when you paid door to door they charge you that extra. In summary here even a capacitor is extremely expensive.

On purpose? As in, sabotage?

​@@chumleykWe could say that, but its more the monetary incentive, a 63 100v caps cost way more than 16 9 or even 5v, and the you have the big tolerance gap which as is +-20% but lets add another 5% because again, they like to overspec things there to sell more but they dont spec if the voltage rating is +-20%, they say the capacitance is.

most electrolytics are 20% anyway, years ago the common/standard grade ones were -20 /+80 ...

I use for my transistor radios.

You should use quality in there.... Thats a shame

Hi Mark, You should be ok. The initial power up would stress the caps to fail if they were weak or fakes. Since it's survived that, I'd say they are good, no worries

@@TrevorsBench thanks for the reassurance. They seem to hold up under stress, the amp is astoundingly good. You know I really like your channel, it's so helpful and informative. Keep it going. My huge thanks.

i purchased that amp from richer sounds. it was a good amp with good build quality.

There r differences between your ChangX and ChongX in the video.

Did you mean: *_ChengX?_*

​@@mattmoreira210Or ChingX?

ChungX 😂

Just go for Panasonic, nichicon, united Chemicon, cde, b&c components, instead of crap and it'll last, especially panasonics fm or fr series or nichicons uhe, uld, upw series

o problema é que algumas lojas aqui no BR estao vendendo esse lixo. eu notei isso nesse momento quando ia trocar um capacitor de uma fonte. fiz um teste rapido com o capacimetro e um cap novo da chong que comprei aqui, está com um valor abaixo do que deveria ser.

@@play134 Comprei no Ebay , vendedor da China 33.000uf 63v, marca SPRAGUE, o vendedor já tinha vendido 104 peças, acreditei por ter essa venda e comprei 4 peças, quando chegaram fiquei desconfiado e fui analisar um deles, não deu outra, removi a capa azul do capacitor e por baixo havia simplesmente outro capacitor com a capa preta, os caras são fo....a, tiveram a manha de recapear um capacitor imitando o original americano, entrei em contato com o vendedor enviando fotos do produto falsificado e pedi o reembolso, pediu desculpas e reembolsou na hora o valor pago. mas já tinha vendido 104 peças.

I always try to source cheap caps but they need to be rated 105C @7000+hrs min. Then once I find them I buy in bulk so costs are low per unit. I wouldn't consider these garbage caps for repair or a project, too risky. Thanks for watching TG!

Yes, I'm sure they were.

I agree with most but Impedance is given at 100 kHz, hat is not the same as ESR but the reactance is very low so it is kinda the ESR. But there is no wear limit given. The parameter of importance is tan d (also known as D or DF) This is given for 100 or 120 Hz. Normally is stated that twice the tan d is the "dead" limit. While measuring he quickly showed D and that was in the 0,6 at 1kHz, that will be around 0,06 at 100 Hz and that is not super bad. (for a normal 85 degrees cap what this probably is in real). Other parameter is the max ripple current, longlivity, ESL, DC leakage etc. But people can not complain, they do care about the specs. The seller does not have datasheets or specs so you are stupid if you buy them.If you care about certain specs, buy caps from a brand that have a datasheet and then check them against that datasheet. Not via some of those made up ESR lists that float over the internet often made by people who have no clue and use a DIY ESR meter at 100 kHz that measures impedance instead of ESR.

@@pa4tim Fantastic placement! On my channel, I made several videos using professional measurement equipment, such as an LCR Bridge, and with a very accurate DC current meter. remembering that the parameters read, and the decision whether they are within the manufacturer's acceptable parameters, depends 100% on the specific datasheet for that capacitor, which in most cases, only reference brands have them in detail. Some parameters read can already give you an idea of ​​the quality and decision to change the capacitors, already having some practical experience. On my channel the content is in Portuguese, but it is possible to activate subtitles with automatic translation. If you can follow along and give your opinions, it will be of great help. Regards

Data sheets of standard caps

You're probably right. They work fine now. The true test will be if they last 5 years or 25 years

@@TrevorsBench I found data sheet for those caps - they are ChengX KM series general purpose capacitors - so I don't think they will last 25 years - they may do fine for 5 years if you don't keep them energized all the time. I think they are intendent for the cheap throw away 1 year warranty devices. www.paullinebarger.net/DS/Chengx/ChengX%20%5Bradial%20thru-hole%5D%20KM%20Series.pdf

@@dmytrodubovoy2923 junk, id recap it instantly

@@TrevorsBench I have the same type LCR as you. What I’ve found (with mine at least) is if you change the frequency to 100 hz or 100khz for your capacitance and ESR tests you’ll have more accurate readings.

@@trevorco2210 I'll keep that in mind, thanks

It does explode real loudly. Tried with 2.2uf 50v one. I had safety glasses but not ear protection. Boy, that was loud. I have ears ringing now. Being in a small confined area didn’t help.

Yes I am well aware of where the aforementioned retailers get their product. What I am saying is that these retailers are reputable and certainly more discriminating of what product they carry. They have long held reputations to uphold.

We all do it, it's natural instinct to want to pay less for anything

CCP sabotage!

Yes, I always wear glasses, i'm blind without them

I've bought thousands of Chinese caps and never had a problem (yet). These duds came from a unknown source and really belong in the garbage can but somebody thought they could profit from them.

Lowest costs for maximum profit, it's human nature

5440uF is 20% under. 6120uF is 10% under spec. What is the tolerance on those?

Teapo's aren't that bad, but still no quality caps. I'd say they are somewhere in the middle.

So do I. I buy them from LCSC and make sure they have good specs. These ones from AliExpress are rejects sold to unsuspecting people looking for a bargain

I actually have an assortment of chongX caps bought 2 years ago in Taiwan. I tested them with 25% overvoltage and none of them leaked, I think he might have gotten rejects.

I hope they've used local components, actually. We might get to watch a great fireworks display.

LOL

Probably not

They would probably fail in that application too

Very festive.

Not sure what to tell you. They could be ok or not, testing them, if you can, will give you some sense if they will work. I think the caps I bought are either fakes or factory rejects that should have been destroyed & not sold. Chongx caps are not regarded as high quality like Rubycon, Nichicon, Elna and so on. Lots of Chongx capacitors were used in Chinese built equipment and are still working today. On the other hand, I've seen lots of broken gear because of these caps failing. I always recommend sticking with a quality brand for caps otherwise it may come back to bite you again

That's fairly typical. Aluminum caps usually have a tolerance of 20% and those are probably just fine for new caps. It's when the capacitance changes drastically and no longer does the job it's supposed to do we consider it failed. There are no 'precision' aluminum caps available because they rely on an electrolyte to work

So does that mean that they would be okay to work with or should I avoid using them ?

@@davidferguson8478 The value is ok and should work. I don't know how long a life they will have

I also buy japanese capacitors, mostly Chemi-Con and Panasonic. And I never had problems with them.

Caps are not supposed to conduct any current

They are a clone of ChengX

Capacitors don't blow up unless they're stressed with high ripple current or run at over voltage. Maybe your capacitors failed because of excess heat or maybe a poor design power supply. Replacing them with quality caps will fix the problem but it may re-occur again if the power supply is a poor design and the stress continues. Quality caps = longer life. Poor quality caps = fails sooner Lots of good brands out there, even some Chinese ones are decent Rubycon, Nichicon, Elna, Panasonic, Kemet to name a few