From: jl@glen--canyon.com   
      
   On Wed, 5 Nov 2025 16:52:30 +0100, Gerhard Hoffmann    
   wrote:   
      
   >Am 05.11.25 um 16:39 schrieb john larkin:   
   >   
   >> But the original 741s tended to have popcorn noise. Millliseconds or   
   >> seconds of silence then a burst of offset pulses, hundreds of   
   >> microvolts. It was caused by crud in oxide layers. Current production   
   >> parts are probably OK.   
   >>   
   >> I like the OPA197.   
   >>   
   >>   
   >> John Larkin   
   >> Highland Tech Glen Canyon Design Center   
   >> Lunatic Fringe Electronics   
   >   
   >IIRC popcorn noise was a problem at RCA. They even had an app note   
   >on how to measure it in their 1974??? data book. The 1st data book I   
   >ever bought, almost still at school...   
   >   
   >Gerhard   
      
   Starting as a freshman EE student, I had a real job too. TI and   
   Motorola reps would show up with a car full of data books and a   
   briefcase full of samples. Great times.   
      
   We actually have a real-life TI rep again now. We have sandwiches in   
   our conference room.   
      
   https://www.dropbox.com/scl/fi/4s4cz13r8i4d6x1kb5r4a/Conference_   
   oom.jpg?rlkey=dmcjg76js62hswuaf73g8stkw&raw=1   
      
      
      
   John Larkin   
   Highland Tech Glen Canyon Design Center   
   Lunatic Fringe Electronics   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)