[sdiy] The TL074 has changed!

[mskala at northcoastsynthesis.com]

On Fri, 1 Aug 2025, Mike Beauchamp wrote:

> To make things more murky, here's a manufacturer expecting TL074H's but upon
> decapping them, suspects they are TL074C (or counterfeit)
>
> https://the-analog-thing.org/newsletter/9/

Interesting that the counterfeiters would go that route - subbing
apparently-genuine TL074Cs, still a fairly expensive chip, for TL074Hs.
The one time I've encountered fake TL074s it appeared that they were
cheaper quad op amps from some other family entirely, likely bipolar:
   https://northcoastsynthesis.com/news/beware-fake-parts/

I didn't decap any of those chips and didn't keep a sample of them.

ST Microelectronics still offer classic JFET-input non-H TL074s, which
could be attractive to those of us who still want such, but they seem to
have discontinued the DIP package, now offering such chips only in
surface-mount.

-- 
Matthew Skala
North Coast Synthesis Ltd.