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Can Dave make a video comparing EBAY OP-AMPS to real ones

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MathWizard:
Some chips on ebay, Aliexpress,  amazon, etc are a lot cheaper than the real thing, and what are people really getting?

I know ebay is not a recommended source for genuine parts. But has anyone done a video, comparing common ebay chips, like op-amp's, to some real ones ? I suppose it could change week to week, but someone with a lot of knowledge and equipment should do a video comparing some.

Like toady I want to get some OP07 op-amps, and I see some cheap ones on ebay. I guess they could be anything, but if they are at least clones, well how good are they ?

But some factories must make clones of chips, and try to make them work the same. There can't be that many places making copies of op-amps.

Ed.Kloonk:
I'd go a step further and suggest examining the impact it might have on a beginner doing most of the prudent things such as reading up, following examples on youtube and on the web and then wondering why their circuit doesn't work properly because they bought lousy parts.

james_s:
Somebody was decapping and posting die pictures a few years ago. IIRC most of the knockoff op amps are some basic jellybean part like the LM358.

John B:
Unless the end goal is to purchase such things off ebay, it's a waste of time and worse still, encourages their sale on both the buyer and seller side.

If you are specifying an OP07, why would you want anything other (read: inferior in performance) than an OP07? They're still jellybean enough that the legit part is reasonably affordable on somewhere like LCSC.

Someone:

--- Quote from: John B on March 22, 2023, 02:03:38 am ---If you are specifying an OP07, why would you want anything other (read: inferior in performance) than an OP07? They're still jellybean enough that the legit part is reasonably affordable on somewhere like LCSC.
--- End quote ---
Depends what specification is important, as there are many manufacturers of OP07:
https://www.lcsc.com/product-detail/General-Purpose-Amplifiers_Hangzhou-Ruimeng-Tech-OP07_C1508997.html
That isn't going to be a drop in replacement for a different brand OP07 in all applications (worse in some areas, and better in others), equally applies between TI and AD parts.

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