On Sun, Apr 19, 2020 at 12:29:24PM -0700, David G Dixon wrote: > I guess I've been lucky -- I've done tons and tons of DIY for 12 years, and > the only "fake" chips I ever bought were a bad batch of LF444 quad opamps. > How did you know they were bad? Were they quiet, with lots of gain and acceptable slew rate? -- Gordonjcp