NE5532 this is what the original looks like and the counterfeit inside. We warn
Jokes aside, the problem of counterfeit electronic components is huge. In our forum, we run a topic called fakes , which has now grown to 41 pages.
The blog team zeptobars.com dealing as a hobby with opening and, more precisely, dissolving the casings of integrated circuits with acid, opened the original NE5532 chip by Texas Instruments and bought a counterfeit from the famous eBay offer of 100 pieces for PLN 20. The effect is terrifying, the counterfeit not only has a smaller matrix, but also lacks many connections, you can say that only the basic things have been kept so that the system can work as an operational amplifier. On the forums, they noticed that the system is definitely much slower, the rate of rise is ~1.25V/µS, instead of 9V/µS.
Interestingly, they also opened the Philips NE5532A production system and the matrix was very similar to the original, it can be said that the parameters in this case will be preserved.
More information and full resolution photos can be viewed at:
https://zeptobars.com/en/read/Ti-NE5532-real-vs-fake-opamp
We warn against counterfeits.
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Comments
It seems to me that if someone is an audiophile and already has what you mention, he also replaced the opamps with more audiophile ones. Counterfeits are a big bane of our times, sometimes it's really... [Read more]
There is a simple method for counterfeit integrated circuits - buy from reliable sources. It's just that the costs then increase several times ... [Read more]
How would they do it? Audiophiles have no idea about the theory of electronics, let alone the practice of soldering. Well, unless someone would set up a special "factory" engaged in such activities :D [Read more]
I'm afraid that with them it's like in the past with drug addicts (perfect knowledge of the necessary piece of chemistry), and here this one procedure is manageable. [Read more]
I had one NE5532 that when connected to the circuit just got hot as hell. Inserted in its place LM833 (identical pinout and similar parameters) worked correctly. It was supposed to act as a W.CZ comparator. ... [Read more]
Oh buddy, I'm afraid you'd be very surprised if you started digging into the subject. Sure, there is a group of those who can't change anything in their equipment themselves (and maybe they... [Read more]
One may ask, why did you concoct the comparator with the 5532 instead of using an integrated comparator for it? [Read more]
One comparator and one buffer (that is, an amplifier with a gain of 1) were needed in the circuit. In the original scheme there was just a W.CZ operational amplifier. As it was impossible to buy it... [Read more]
But you know what you pay for. For hobby applications, I do not see the slightest sense of buying in China. Prices in wholesalers, i.e. DigiKey, Mouser, RS, etc. are slightly higher than in the Far East... [Read more]
Both integrated circuits and simpler (not necessarily cheaper) elements such as transistors are counterfeited. Apparently, there are also "empty" systems inside, only the type of housing / number of pins... [Read more]
Why a fake now? After all, so many famous companies boast that they are making newer and newer systems in the technology of smaller and smaller nanometers, and that they are supposedly much better... [Read more]
Or rather, some users are fakes who can't read the documentation. :?: :D And what the hell to open, digest in acid, etc ... It is enough to be able to read the documentation, and not to sow... [Read more]
Well, you're not bad at it... The cream of society sits in Dallas and they produce high-end elements, and not all of them either, because they have more modern factories in China and Taiwan. image... [Read more]
The problem is that fakes do not meet the parameters specified in the documentation, someone even measured it: https://www.eevblog.com/forum/reviews/chinese-fake-op-amps/ Unless they have their documentation,... [Read more]
I've already written once :!: And Texas Instruments itself has several datasheets - because it produces them in different factories It's a pity that you can't see the nonsense you provide... [Read more]
You most likely have an older operating system that is no longer supported by the manufacturer ;) Use a different browser, e.g. mozilla firefox or use http:// instead of https:// in the link address ... [Read more]
"And in addition, the larger the chip, the greater the capacity, and the noise floor." Sorry, but this is complete nonsense, because there are definitely more factors here than just the size of the structure. ... [Read more]
Sockets for circuits in audiophile equipment? That's a crime :-) [Read more]
Why do you think so? Your equipment - your business. [Read more]