| General > General Technical Chat |
| i won't buy chinise parts from aliexpress or ebay |
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| cmrincon:
Hey! I want to share with you a short story about how not to save money: Yesterday i was learning about mosfets amps and i decided to use a few 2n7000 N-channel mosfet which i got from aliexpress time ago. I did the maths, even i simulated the circuit. When i mounted the circuit in my breadboard i could see that the mosfet was in ohm region and with a volt above VTh the drain current was more than it could handle, no matter if i slightly drop down vgs, the circuit still didn't work because my mosfet didn't behaves as datasheet and it was useless for amplification ( maybe for switching purposes). Few weeks ago i get capacitors from another chinise vendor on ali, and i used them to repair a sat receiver. Yesterday i got to repair it again, was hard because i couldn't see at first glance what was wrong with the receiver, but after a few test i repaired it. Guess what was wrong? the chinise capacitors! I can't belive that all chinise parts are like this ones, and i gave my last chance to lcsc. I bought some MMBTH10, ceramic caps and few rf npn bjts from not chinise manufacturer. In a month i will know if i will loose the money or it is a cheap way to buy parts. Don't buy not original parts!! |
| Quarlo Klobrigney:
Internet grammar police here. :palm: ..You have employed a double negative. Your statement reads that you will buy from Aliexpress. |
| Pinkus:
Well, I guess you learned from that lesson.... as many of us did before. Unfortunately there are enough cheapos left so the problem will not vanish. |
| Mechatrommer:
i won't never buy chinise parts from aliexpress or ebay = i will buy chinise parts from aliexpress or ebay Don't buy not original parts!! = buy original parts!! both points are valid imho... its just we learn to read the spec and make it half or a third capability when it comes to china clone parts.. with 1/10X the price, still bang for the buck, in certain occasions. ymmv. |
| cmrincon:
I'm sorry, i modified the topic in order to avoid confusions! :phew: |
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